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Home My WebLink About10-16-18 Board of Public Works Meeting AgendaPROPOSED RESOLUTION City of Board of Public Works Declaration of Lead Agency Cascadilla Creek Dredging & Sediment Trap October 15, 2018 WHEREAS: 6 NYCRR Part 617 of the State Environmental Quality Review Law and Chapter 176.6 of the City Code, Environmental Quality Review, require that a lead agency be established for conducting environmental review of projects in accordance with local and state environmental law, and WHEREAS: State Law specifies that for actions governed by local environmental review, the lead agency shall be that local agency which has primary responsibility for approving and funding or carrying out the action, and WHEREAS: the City Board of Public Works intends to undertake a project to dredge the lower reach of Cascadilla Creek and install one sediment trap in the stream channel, and WHEREAS: the project involves the mechanical dredging of Cascadilla Creek between the confluence with Cayuga Inlet and the pedestrian bridge adjacent to New York State Route 13 (N. Meadow Street). The length of the creek corridor to be impacted is approximately 1,700 feet and between 12,000 – 18,000 cubic yards of sediment may be dredged to restore navigation and minimize winter ice jam formations. The sediment will be temporarily placed on an adjacent site for drying and subsequently removed. To minimize the future deposition of these coarse aggregates in the dredged channel, the City is also proposing the installation of a sediment trap within the channelized segment of the creek that can be accessed by City forces on a permitted basis to remove captured sediments, and WHEREAS: this has been determined to be a Type I Action in accordance with the City of Ithaca Environmental Quantity Review Ordinance (CEQR) 176-4 B. (1) (h) [2] and the State Environmental Quality Review Act (SEQRA) 617.4 (b)(10) and is subject to Environmental Review, and WHEREAS: the NYS Dormitory Authority, NYS Department of Environmental Conservation, and the NYS Canal Corporation, all potentially involved agencies in this action, have all consented to the Board acting as Lead Agency for this project, now, therefore be it RESOLVED: that the Board of Public Works does, by way of this resolution, declare itself Lead Agency in Environmental Review for the proposed project. Moved by: Seconded by: In favor: Against: Abstain: Absent: Vacancies: PROPOSED RESOLUTION City of Board of Public Works CEQR/SEQR Negative Declaration Cascadilla Creek Dredging & Sediment Trap October 15, 2018 WHEREAS: the City Board of Public Works intends to undertake a project to dredge the lower reach of Cascadilla Creek and install one sediment trap in the stream channel, and WHEREAS: the project involves the mechanical dredging of Cascadilla Creek between the confluence with Cayuga Inlet and the pedestrian bridge adjacent to New York State Route 13 (N. Meadow Street). The length of the creek corridor to be impacted is approximately 1,700 feet and between 12,000 – 18,000 cubic yards of sediment may be dredged to restore navigation and minimize winter ice jam formations. The sediment will be temporarily placed on an adjacent site for drying and subsequently removed. To minimize the future deposition of these coarse aggregates in the dredged channel, the City is also proposing the installation of a sediment trap within the channelized segment of the creek that can be accessed by City forces on a permitted basis to remove captured sediments, and WHEREAS: this has been determined to be a Type I Action in accordance with the City of Ithaca Environmental Quantity Review Ordinance (CEQR) 176-4 B. (1) (h) [2] and the State Environmental Quality Review Act (SEQRA) 617.4 (b)(10) and is subject to Environmental Review, and WHEREAS: the NYS Dormitory Authority, NYS Department of Environmental Conservation, and the NYS Canal Corporation, all potentially involved agencies in this action, have all consented to the Board acting as Lead Agency for this project, and WHEREAS: on October 15, 2018, the Board did declare itself Lead Agency in Environmental Review for the proposed project, and WHEREAS:this Board, acting as Lead Agency in environmental review, did on October 15, 2018 review and accept as adequate: a Full Environmental Assessment Form (FEAF), Part 1, 2 and 3, prepared by staff and the following documents: “Cascadilla Creek Preliminary Design Report” dated March 2018 and prepared by T.G. Miller P. C and “6XEVXUIDFH,QYHVWLJDWLRQ&DVFDGLOD&UHHN'UHGJLQJ,WKDFD1<´ dated July 24, 2018 and prepared by Atlantic Testing and Laboratories, Limited (ALT) and other a materials, now, therefore be it RESOLVED: that the City Board of Public Works determines that for the reasons stated in the FEAF Part 3, the proposed project will result in no significant impact on the environment and that a Negative Declaration for purposes of Article 8 of the Environmental Conservation Law be filed in accordance with the provisions of Part 617 of the State Environmental Quality Review Act. Moved by: Seconded by: In favor: Against: Abstain: Absent: Vacancies: Page 1 of 11 FULL ENVIRONMENTAL ASSESSMENT FORM - Part III Project Name: Cascadilla Creek Dredging and Installation of a Sediment Trap Date Created: 10-10-18 PROJECT DESCRIPTION In response to notable sediment deposition that impairs boat navigation and fosters winter ice jams, the City of Ithaca is pursuing the mechanical dredging of Cascadilla Creek between the confluence with Cayuga Inlet and the pedestrian bridge adjacent to New York State Route 13 (N. Meadow Street). The length of the creek corridor to be impacted is approximately 1,700 feet and between 12,000 – 18,000 cubic yards of sediment may be dredged to restore navigation and minimize winter ice jam formations. The sediment will be temporarily placed on an adjacent site for drying and subsequently removed. To minimize the future deposition of these coarse aggregates in the dredged channel, the City is also proposing the installation of a sediment trap within the channelized segment of the creek that can be accessed by City forces on a permitted basis to remove captured sediments. The project involves approvals or funding from the City Board of Public Works, NYS DEC, NYS Canal Corporation, US Army Corps of Engineers and the NYS Dormitory Authority. This has been determined to be a Type I Action in accordance with the City of Ithaca Environmental Quantity Review Ordinance (CEQR) 176-4 B. (1) (h) [2] and the State Environmental Quality Review Act (SEQRA) 617.4 (b)(10) and is subject to Environmental Review. IMPACT ON LAND The project site is both with the Cascadilla Creek Channel and on and adjacent site that has been developed for low intensity commercial use for some time. The owner of the adjacent land plans to develop the site for housing and mixed use in the near future. It is anticipated that the mechanical operation will utilize barges to float the excavators and haul sediment to the shore line. A long- reach, track-mounted excavator may also be utilized for sediment removal between boat slips and docks along the north bank. A temporary dewatering facility will be located on a site immediately adjacent to this segment of creek on the north bank. Minor grading may be needed to facilitate dewatering, however no significant excavation is anticipated. The property owner has signed a Letter of Intent relative to the use of this land for the project by temporary easement. At completion, the partially dried sediments will be removed for a beneficial use and the site will be temporarily restored and stabilized as needed until the larger development plans proceed. Impacts: The project will temporarily disturb previously developed land for dredging operations. Mitigations: A Basic Storm Water Pollution Prevention Plan (SWPPP) will be required to manage stormwater for the duration of the project. The SWPPP will include erosion and sediment controls. The Lead Agency has determined that with the proposed mitigations, no significant impacts to land are anticipated. Page 2 of 11 IMPACT ON WATER The dredging operation is described as follows n the attached Preliminary Design Report dated March 2018 and prepared by T.G. Miller: The extents of the dredging work are illustrated on drawings C100-C201 attached to this Report. Bathymetric survey data collected by the USGS in July 2016 was supplemented with a field survey performed by this firm in February 2017 to produce a representative map of existing hydrographic conditions. In general, the depth of sediment to be removed averages 3.6 feet. The width of the dredged area varies between 80 and 160 feet. It is anticipated the mechanical operation will utilize barges to float the excavators and haul sediment to the shore line. A long-reach, track-mounted excavator may also be utilized for sediment removal between boat slips and docks along the north bank. A temporary dewatering facility will be located immediately adjacent to this segment of creek on the north bank. A Basic Storm Water Pollution Prevention Plan (SWPPP) will be required to manage stormwater for the duration of the project. NYSDEC defines the following three classes of sediments: Class A - No Appreciable Contamination (No Toxicity to aquatic life). If sediment chemistry is found to be at or below the chemical concentrations which define this class, dredging and in-water or riparian placement, at approved locations, can generally proceed. Class B - Moderate Contamination (Chronic Toxicity to aquatic life). Dredging and riparian placement may be conducted with several restrictions. These restrictions may be applied based upon site- specific concerns and knowledge coupled with sediment evaluation. Class C - High Contamination (Acute Toxicity to aquatic life). Class C dredged material is expected to be acutely toxic to aquatic biota and therefore, dredging and disposal requirements may be stringent. When the contaminant levels exceed Class C, it is the responsibility of the applicant to ensure that the dredged material is not a regulated hazardous material as defined in 6NYCRR Part 371. The Lead Agency notes that guidelines for the disposal of Class B sediments, though more restricted than Class A, still allows for a broad range of options including many beneficial uses. Sediment sampling and testing was conducted in June 2018 to characterize the sediments and provide other data for the dredging. The results have been provided in the attached report titled Subsurface Investigation Cascadila Creek Dredging, Ithaca, NY dated July 24, 2018 and prepared by Atlantic Testing and Laboratories, Limited (ALT). Seven sediment samples were collected and analyzed for a variety of compounds. Laboratory testing identified concentrations of semi- volatile organic compounds, metals and PBC in the Class B range in the some of the samples and two concentrations of dichlorodiphenyldichloroethane (DDT) in the Class C range in two samples. Page 3 of 11 The report concludes: Based on these findings, if this material is to be removed, dredging should be completed per criteria for Class B sediments (with Class C sediment considerations in the areas SD- 04 and SD-05) and the removed materials should be managed under an appropriate approved reuse option, via a Beneficial Use Determination, or properly disposed of per NYSDEC regulations. On October 9, 2018, Mike Thorne, the Superintendent of Public Works, and Lisa Nicholas, the Deputy Director of Planning , met with DEC staff from the Divisions of Materials Management and Water to clarify whether these results, particularly for the Class C samples, would necessitate special handling and disposal of the dredged sediments and prevent a Beneficial Use Determination (BUD). DEC Staff reported that it is likely all sediments could be handled and disposed of as Class B due to the low levels of DDT detected in the two samples and the recent elevation of DDT threshold for Class B sediments. DEC staff also indicated that a BUD was probable. Impacts: x The project will temporarily disturb in-stream/bottom sediments which will result in localized turbidity. x The project will temporarily disturb areas along the streambank for mechanical dredging x The project will temporarily discharge water (removed with the sediments during the dredging) back into Cascadilla Creek as part of the dewatering process. x The project will require in stream handling of sediments that contain contaminates that exceed Class A standards. Mitigations: The project will require the following permits: NYSDEC Section 401 (Water Quality), NYSDEC Article 15 (Protection of Waters) and NYSDEC SPEDES (Discharge), ACOE Section 10 & 404 (Work in Navigable Waters). Permits from NYSDEC will have conditions related to turbity and protection of the aquatic ecosystem. Best practices will be required to minimize downstream migration of suspended sediments and handling of Class B sediments. In addition, dredging will be restricted to the period between July 15 and March 15th to minimize interference with the warm water fish community during spawning. A Basic SWPPP will also be required in accordance with the City’s Stormwater Regulations. Strict regulatory compliance to the terms of the above permits will mitigate any potential impacts to water. The Lead Agency has determined that with the proposed mitigations, no significant impacts to water are anticipated. IMPACT ON DRAINAGE The purpose of the project is to improve drainage within the stream by removing accumulated sediments and installing an upstream sediment trap, therefore these aspects of the project will increase stream capacity and have a positive effect on drainage. The dewatering facility and dredging operations will require a Basic SWPPP to address potential erosion and stormwater runoff during the project. The Lead Agency has determined that based on the above information, no significant negative impacts to drainage are anticipated. Page 4 of 11 IMPACT ON AIR There are no residential uses within 750 feet for the project site. Adjacent and nearby uses include the Ithaca Waste Water Treatment Plant, The City Golf Course, TCAT bus storage and garage, and other similar uses. Dredging is expected to last approximately 3 months and will involve use of equipment and movement of sediments which have the potential for temporary minor impacts to air quality in proximity to the site. The dredging operation will involve the use of diesel equipment such as barge mounted to excavators, long-reach, track-mounted excavator and one or two dump trucks. It is expected that the excavators will load the sediments directly onto dump trucks which will then carry the materials across the site to the dewatering location. These operations will not increase the likelihood of airborne dust particles because the sediments will be wet. Sediment drying and removal may have the potential to create airborne dust. Sediments will not completely dry out during dewatering. Moisture content will still be high when the material is loaded for hauling to a disposal site. If the sediment must reside for a longer period of time before removal, tarps will be used to prevent wind-blown dust. Removal of the dried sediments is expected to last 3-10 weeks depending on the number and size of trucks used for hauling. Trucking required to transport the dried sediments off site will produce emissions but is unlikely to create the potential for airborne particles as the sediments will have a high moisture content. Mitigations measure to minimize airborne dust will include: x Misting or fog-spraying site to minimize dust, as needed x Tarping the dried sediments if they must stay on site longer than anticipated x Maintaining crushed stone tracking pads at all entrances to the construction site x Requiring trucks to be covered when hauling off site The Lead Agency has determined that based on the information above no significant impact to air is anticipated. IMPACT ON PLANTS AND ANIMALS A comprehensive habitat survey titled Characterization of Aquatic Habitats of Southern Cayuga Lake Tributaries and Shoreline, Ithaca New York was completed by Ecologic LLC in 2008. The report was intended to characterize shoreline and tributary habitat that could potentially be affected by future dredging. The study identified three habitat units in the lower reach of Cascadilla Creek – the conditions of which are summarized in the following table: Substrate and Cover Key: D = dominant; SD = subdominant; A = abundant; P = present; S = sparse Substrate and Cover Habitat Unit Substrate Cover % Cover Depth (ft) Shoreline Cover type(s) Noted Aquatic Vegetation 1 Silt - D (off-shore) Docks/boats - A Shading - A >25 Up to 7 ft, reduced to Lacustrine riprap/artificial shore None observed Page 5 of 11 Sand - D (near shore) Fallen tree/brush - S Boulders (riprap) - S ≤5 in Cascadilla Cr. Lacustrine submerged structure 13 Sand - D Silt - SD Shading - A Fallen tree/brush – P Log/stump/root - P 10-25 0.5-4, mostly ≤3 Successional northern hardwoods None observed 14 Silt - D Submersed veg. - A Fallen tree/brush – P Emergent veg. - S 10-25 1-4, mostly ≤3 Successional shrubland Successional northern hardwoods Shallow emergent marsh (little) Stuckenia pectinata Typha sp. Vallisneria americana Substrate and Cover Key: D = dominant; SD = subdominant; A = abundant; P = present; S = sparse The survey provided a detailed description of each habitat unit (below) Habitat Unit 1 This habitat unit is abundant in portions of Sixmile Creek, Cascadilla Creek, and Cayuga Inlet. It is characterized by significantly human-modified shoreline consisting of wooden, concrete, rock, or metal bulkheads, docks, retaining walls, riprap, or other structures. These structures provide the bulk of the available in-water cover, which is generally abundant. Aquatic vegetation is generally lacking. Depth in near-shore areas often exceeded 5 ft. Littoral fish species [e.g., sunfish (Lepomis spp.), bass (Micropterus spp.), and minnows (Cyprinidae)] may make use of this habitat due to the cover provided by the various structures. Wildlife use of this habitat is limited due to a general lack of forage and terrestrial cover, though some passerine birds and ducks (mallard, Anas platyrhynchos) were observed in this habitat. Recreational use of this habitat in the form of boating is heavy. Evidence of use impairment of this habitat type due to sediment accumulation was not readily apparent in most areas. The exception to this is the portion of Cascadilla Creek containing this habitat type. Much of the creek in this area has considerable accumulation of fine sediment, reducing water depth to 2-5 ft in most areas. Sediment accumulation in these areas negatively affects motorboat use. In Sixmile Creek, deep-draft (>5 ft) vessels may be limited in their ability to use this habitat due to depth limitations, but other boat traffic in this habitat is apparently heavy based on the number of boat slips and docks present. Habitat Unit 13 Habitat unit 13 is limited to the upper southern portion of the channel of Cascadilla Creek. This habitat is characterized by very shallow (mostly <3 ft deep), stagnant, turbid water with cover provided by large woody debris and overhead shading by trees. Substrate is predominantly sand with silt as subdominant. No aquatic vegetation was observed except for floating fragments that apparently drifted in from other areas. This area provides relatively poor habitat for most aquatic organisms due to the high turbidity and low structural diversity. It is also of little recreational value due to the high turbidity and the shallow depth of water. Use impairment due to accumulated sediment is apparent. Motorized boat traffic is precluded due to the shallow depth, and even canoeing or kayaking would be difficult in the shallowest areas. The high turbidity results in low aesthetic quality. Habitat Unit 14 Page 6 of 11 Habitat unit 14 is similar in nature to habitat unit 13 and is located in the lower southern portion of the channel of Cascadilla Creek (Figure 2B). This habitat is characterized by very shallow (mostly <3 ft deep), stagnant, turbid water with cover provided by submersed vegetation (primarily wild celery) and fallen trees and brush (Table 1, Photo 16). There is also a small stand of cattail at its western end. Substrate is predominantly deep silt. This area provides marginally better habitat for fish and wildlife than habitat unit 13. Common carp, belted kingfisher and mallard were observed using this habitat. This area is of little recreational value due to the high turbidity and the shallow depth of water. Use impairment due to accumulated sediment is apparent. Motorized boat traffic is precluded due to the shallow depth. The high turbidity also results in low aesthetic quality. Potential Impacts & Mitigations Impacts of dredging on the fish community would be minor in nature and temporary in duration. Southern Cayuga Lake provides only limited areas of prime spawning habitat for the warm water fish community; the extensive littoral habitat in the lake’s northern basin is more important to maintaining the lake-wide fishery. In addition, required DEC permits will restrict dredging to the period between July 15 and March 15th to minimize interference with the warm water fish community during spawning. As documented in the habitat survey, sediment deposition has impaired the quality of the littoral habitat for aquatic biota. Removal of sediment will also remove macrophytes and macroinvertebrates. These impacts will be temporary; recolonization of the stream channel with these aquatic organisms is expected to be rapid. The dredging permit is anticipated to include restrictions on activity in the stream near the mouths of tributaries from July 15 to March 15 to minimize impact on reproduction of the warm water fish community. As impacts will be minor and temporary. The Lead Agency has determined that based on the information above no significant impact to plants and animals is anticipated. IMPACT ON AESTHETIC RESOURCES The dredging project is temporary and will not permanently alter the physical appearance of Cascadilla Creek or the adjacent property. The sediment trap will be placed in the creek bed and will not alter the appearance of the creek. For the reasons stated above, the Lead Agency has determined that there is no potential impact to Aesthetic Resources. IMPACT ON HISTORIC AND ARCHEOLOGICAL RESOURCES The project is not within a National or Local Historic District. The site to be used for dewatering has been previously disturbed and under commercial use for many years. For the reason stated above, the Lead Agency has determined that there is no potential impact to Historic or Archeological Resources. IMPACT ON RECREATION AND OPEN SPACE Page 7 of 11 For the duration of the dredging project, all boats and recreational watercraft will prohibited in Cascadilla Creek. Motorized boats use the lower reach of Cascadilla Creek only to access docks on the north bank, which are privately owned and will be removed (and subsequently replaced) during seawall replacement/ construction that is part of the larger development project on the adjacent site. The City is coordinating with the property owner to time the dredging operation after the new sea wall has been installed and before the docks have been replaced. Non-motorized boats and paddle craft will be temporarily blocked from use of the put-in on the south bank of the creek. The impact is temporary and unavoidable, and dredging will improve navigation and recreational access on the lower reaches of the creek. Therefore the Lead Agency has determined that there will be no significant impact to recreation and open space as a result of this project. IMPACT ON UNIQUE NATURAL AREAS OR CRITICAL ENVIRONMENTAL AREAS The project is not in or near a Unique Natural Area or Critical Environmental Area, therefore the Lead Agency has determined that there will be no significant impact as a result of the project. IMPACT ON TRANSPORTATION Once dry enough to move, the sediments will be removed from the site by truck. The final destination will depend on the grain size, and the granting of a BUD. Dredging is expected to remove a small amount of gravel/rock which will be stockpiled by the City for use in road construction. All other sediments will be removed from the site and transported to a destination for either reuse- if a beneficial use permit is granted or disposal should the NYS DEC require special handling. Trucks transporting sediment off site will travel a short distance on Willow Ave to State Route 13, turning either north or south depending on the final destination. Route 13 carries much of the traffic approaching the City of Ithaca from the south and southwest. Commuters from Tioga County, Elmira and other parts of Chemung County use this route. SR-34/96 joins SR-13 near the Town of Ithaca/Town of Newfield border. Potential Impacts There is a potential temporary traffic impact associated with the removal of dried sediment for beneficial use and/or ultimate disposal. The number of trips associated with removal of dried material has been projected using assumptions regarding truck size and timing of trips as seen in the table below. According to this analysis, the maximum additional truck traffic associated with sediment removal is four to eighteen vehicles per hour (counting a departure and an arrival as two separate trips). This could have an impact on the traffic flow of Route 13 (Elmira Road) or on the intersection of Route 13 and Willow Ave during am and pm peak traffic times. Although a large impact is not anticipated, the City intends to require that sediment removal be done during non-peak times or overnight. As impacts will be minor and temporary. The Lead Agency has determined that based on the information above no significant impact to transportation is anticipated. Page 8 of 11 IMPACT ON ENERGY Traffic Scenarios for the Removal of 15,000 CY of Dried Sediment from Dewatering Site 8 Hour Workday # of Trucks Max # of loads/day Max # of trips/day Max # of loads per week Max # of trips/week Duration (weeks) 1 loader 2 loaders 10 wheeler 4 32 64 160 320 8 7 6 48 96 240 480 5 5 8 64 128 320 640 4 4 10 80 160 400 800 3 3 2 15 30 74 148 11 10 18 wheeler 4 30 59 148 295 6 5 6 44 89 222 443 4 3 8 59 118 295 591 3 2 10 74 148 369 738 2 2 9 Hour Workday # of Trucks Max # of loads/day Max # of trips/day Max # or loads per week Max # of trips/week Duration (weeks) 1 loader 2 loaders 10 wheeler 4 36 72 180 360 7 6 6 54 108 270 540 5 4 8 72 144 360 720 3 3 10 90 180 450 900 3 3 18 wheeler 2 17 33 83 166 10 9 4 33 66 166 332 5 4 6 50 100 249 498 3 3 8 66 133 332 665 3 2 10 83 166 415 831 2 2 10 Hour Workday # of Trucks Max # of loads/day Max # of trips/day Max # of loads per week Max # of trips/week Duration (weeks) 1 loader 2 loaders 10 wheeler 4 40 80 200 400 6 6 6 60 120 300 600 4 4 8 80 160 400 800 3 3 10 100 200 500 1000 3 2 18 wheeler 4 37 74 185 369 5 4 6 55 111 277 554 3 3 8 74 148 369 738 2 2 10 92 185 462 923 2 2 Page 9 of 11 Dredging is expected to last approximately 3 months and will involve the use of equipment to remove sediments from the creek, move them to the drying location on site and transport them off the site for reuse. The dredging operation will involve the use of diesel equipment such as barge mounted excavators, a long-reach, track-mounted excavator and one or two dump trucks. It is expected that the excavators will load the sediments directly onto dump trucks which will then carry the materials across the site to the dewatering location. Removal of the dried sediments will be by diesel truck and is expected to last 3-10 weeks depending on the number and size of trucks used for hauling. The use of energy in the form of diesel fuel is temporary and unavoidable. Therefore the Lead Agency has determined that there will be no significant impact to energy as a result of this project. IMPACT ON NOISE AND ODORS There are no residential uses within 750 feet for the project site. Adjacent and nearby uses include the Ithaca Waste Water Treatment Plant, The City Golf Course, TCAT bus storage and garage, and other similar uses. The project is in an urban area of the City of Ithaca. Ambient noise levels near the site result from the nearby Norfolk Southern Railroad (an intermittent noise source) and traffic from Route 13 (a nearly-continuous noise source). Traffic noise also originates from vehicles entering and leaving the TCAT and City facilities adjacent to the site. Noise levels at the site will increase during the dredging operation and during the removal of dried sediments. Dredging is expected to last approximately 3 months and will involve use of diesel equipment such as a long reach excavator, a small barge –top excavator and one or two dump trucks. Sediment removal will last between 3-10 weeks and will involve the use of dump trucks. Exhaust fumes from heavy equipment will produce odor during the project. The dewatering operation is not anticipated to create offensive odors as sediments to be removed from the stream channels are low in organic matter. Sediments will also be hauled from the site within 3-6 moths from removal. The impact is temporary and unavoidable. Therefore the Lead Agency has determined that there will be no significant impact to noise and odors as a result of this project. IMPACT ON PUBLIC HEALTH The project involves the handling of sediments that have some level of contamination. NYSDEC defines the following three classes of sediments: Class A - No Appreciable Contamination (No Toxicity to aquatic life). If sediment chemistry is found to be at or below the chemical concentrations which define this class, dredging and in-water or riparian placement, at approved locations, can generally proceed. Page 10 of 11 Class B - Moderate Contamination (Chronic Toxicity to aquatic life). Dredging and riparian placement may be conducted with several restrictions. These restrictions may be applied based upon site- specific concerns and knowledge coupled with sediment evaluation. Class C - High Contamination (Acute Toxicity to aquatic life). Class C dredged material is expected to be acutely toxic to aquatic biota and therefore, dredging and disposal requirements may be stringent. When the contaminant levels exceed Class C, it is the responsibility of the applicant to ensure that the dredged material is not a regulated hazardous material as defined in 6NYCRR Part 371. The Lead Agency notes that guidelines for the disposal of Class B sediments, though more restricted than Class A, still allows for a broad range of options including many beneficial uses. Sediment sampling and testing was conducted in June 2018 to characterize the sediments and provide other data for the dredging. The results have been provided in the attached report titled Subsurface Investigation Cascadila Creek Dredging, Ithaca, NY dated July 24, 2018 and prepared by Atlantic Testing and Laboratories, Limited (ALT). Seven sediment samples were collected and analyzed for a variety of compounds. Laboratory testing identified concentrations of semi- volatile organic compounds, metals and PBC in the Class B range in the some of the samples and two concentrations of dichlorodiphenyldichloroethane (DDT) in the Class C range in two samples. The report concludes: Based on these findings, if this material is to be removed, dredging should be completed per criteria for Class B sediments (with Class C sediment considerations in the areas SD- 04 and SD-05) and the removed materials should be managed under an appropriate approved reuse option, via a Beneficial Use Determination, or properly disposed of per NYSDEC regulations. On October 9, 2018, Mike Thorne, the Superintendent of Public Works, and Lisa Nicholas, the Deputy Director of Planning , met with DEC staff from the Divisions of Materials Management and Water to clarify whether these results, particularly for the Class C samples, would necessitate special handling and disposal of the dredged sediments and prevent a Beneficial Use Determination (BUD). DEC Staff reported that it is likely all sediments could be handled and disposed of as Class B due to the low levels of DDT detected in the two samples and the recent elevation of DDT threshold for Class B sediments. DEC staff also indicated that a BUD was probable. Impacts: The project will require in stream handling of sediments that contain contaminates that exceed Class A standards. Mitigations: The project will require the following permits: NYSDEC Section 401 (Water Quality), NYSDEC Article 15 (Protection of Waters) and NYSDEC SPEDES (Discharge), ACOE Section 10 & 404 (Work in Navigable Waters). Permits from NYSDEC will have conditions related to turbity and protection of the aquatic ecosystem. Best practices will be required to minimize downstream migration of suspended sediments and handling of Class B sediments. The City will seek a BUD which, if granted, will dictate appropriate uses for died sediments. If a BUD is not granted, the dried sediments will be disposed of in accordance with NYSDEC’s regulations regarding materials management. A Basic Page 11 of 11 SWPPP will also be required in accordance with the City’s Stormwater Regulations. Strict regulatory compliance to the terms of the above permits will mitigate any potential impacts to public health. The Lead Agency has determined that with the proposed mitigations, no significant impacts to public health are anticipated. IMPACT ON GROWTH AND CHARACTER OF COMMUNITY OR NEIGHBORHOOD The project will not have a permanent negative impact on the character or function of the neighborhood. During the project there will be temporary disruptions to recreational use, and minor impacts to as described above as a result of short term intensive construction activities. Once complete the project is expected to improve recreational access and reduce the risk of flooding due to winter ice jams along Cascadilla Creek. For these reasons, the net result of the project will be positive for the waterfront and the community. The Lead Agency has determined that based on the information above, no significant impacts to growth and character of the community are anticipated. Prepared by: Lisa Nicholas, AICP Page 1 of 13 Full Environmental Assessment Form Part 1 - Project and Setting Instructions for Completing Part 1 Part 1 is to be completed by the applicant or project sponsor. Responses become part of the application for approval or funding, are subject to public review, and may be subject to further verification. Complete Part 1 based on information currently available. If additional research or investigation would be needed to fully respond to any item, please answer as thoroughly as possible based on current information; indicate whether missing information does not exist, or is not reasonably available to the sponsor; and, when possible, generally describe work or studies which would be necessary to update or fully develop that information. Applicants/sponsors must complete all items in Sections A & B. In Sections C, D & E, most items contain an initial question that must be answered either “Yes” or “No”. If the answer to the initial question is “Yes”, complete the sub-questions that follow. If the answer to the initial question is “No”, proceed to the next question. Section F allows the project sponsor to identify and attach any additional information. Section G requires the name and signature of the project sponsor to verify that the information contained in Part 1is accurate and complete. A. Project and Sponsor Information. Name of Action or Project: Project Location (describe, and attach a general location map): Brief Description of Proposed Action (include purpose or need): Name of Applicant/Sponsor: Telephone: E-Mail: Address: City/PO: State: Zip Code: Project Contact (if not same as sponsor; give name and title/role): Telephone: E-Mail: Address: City/PO: State: Zip Code: Property Owner (if not same as sponsor): Telephone: E-Mail: Address: City/PO: State: Zip Code: Cascadilla Creek Dredging & Installation of a Sediment Trap Cascadilla Creek from its mouth to the Route 13 bridge & one upstream location between Farm and Tompkins Streets for sediment a trap In response to notable sediment deposition that impairs boat navigation and fosters winter ice jams, the City of Ithaca is pursuing the mechanical dredging of Cascadilla Creek between the confluence with Cayuga Inlet and the pedestrian bridge adjacent to New York State Route 13 (N. Meadow Street). The length of the creek corridor to be impacted is approximately 1,700 feet and upwards of 12,000 cubic yards of sediment may be dredged to restore navigation and minimize winter ice jam formations. The sediment will be temporarily placed on an adjacent site for drying and subsequently removed. To minimize the future deposition of these coarse aggregates in the dredged channel, the City is also proposing the installation of a sediment trap within the channelized segment of the creek that can be accessed by City forces on a permitted basis to remove captured sediments. This has been determined to be a Type I Action in accordance with the City of Ithaca Environmental Quantity Review Ordinance (CEQR) 176-4 B. (1) (h) [2] and the State Environmental Quality Review Act (SEQRA) 617.4 (b)(10) and is subject to Environmental Review. Lisa Nicholas for the City of Ithaca 607-274-6557 lnicholas@cityofithaca.org 108 E Green St Ithaca NY 14850 Page 2 of 13 B. Government Approvals B. Government Approvals Funding, or Sponsorship.(“Funding” includes grants, loans, tax relief, and any other forms of financial assistance.) Government Entity If Yes: Identify Agency and Approval(s) Required Application Date (Actual or projected) a. City Council, Town Board, Yes No or Village Board of Trustees b. City, Town or Village Yes No Planning Board or Commission c. City Council, Town or Yes No Village Zoning Board of Appeals d. Other local agencies Yes No e. County agencies Yes No f. Regional agencies Yes No g. State agencies Yes No h. Federal agencies Yes No i. Coastal Resources. L. Is the project site within a Coastal Area, or the waterfront area of a Designated Inland Waterway?Yes No LL. Is the project site located in a community with an approved Local Waterfront Revitalization Program? Yes No LLL. Is the project site within a Coastal Erosion Hazard Area? Yes No C. Planning and Zoning C.1. Planning and zoning actions. Will administrative or legislative adoption, or amendment of a plan, local law, ordinance, rule or regulation be the Yes No only approval(s) which must be granted to enable the proposed action to proceed? x If Yes, complete sections C, F and G. x If No, proceed to question C.2 and complete all remaining sections and questions in Part 1 C.2. Adopted land use plans. a. Do any municipally- adopted (city, town, village or county) comprehensive land use plan(s) include the site Yes No where the proposed action would be located? If Yes, does the comprehensive plan include specific recommendations for the site where the proposed action Yes No would be located? b. Is the site of the proposed action within any local or regional special planning district (for example: Greenway Yes No Brownfield Opportunity Area (BOA); designated State or Federal heritage area; watershed management plan; or other?) If Yes, identify the plan(s): _______________________________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ c. Is the proposed action located wholly or partially within an area listed in an adopted municipal open space plan, Yes No or an adopted municipal farmland protection plan? If Yes, identify the plan(s): ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ ✔ ✔ ✔ ✔City Board of Public Works - Approval to work in City Waterway November 2018 ✔ ✔DASNY/Funding Aproval; NYSDEC / Section 401, Article 15 & SPEDES December 2018 ✔USACE/ Section 10 & Section 404;December 2018 ✔ ✔ ✔ ✔ ✔ ✔ ✔ Remediaton Sites:755006 ✔ Page 3 of 13 C.3. Zoning a. Is the site of the proposed action located in a municipality with an adopted zoning law or ordinance. Yes No If Yes, what is the zoning classification(s) including any applicable overlay district? _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ b. Is the use permitted or allowed by a special or conditional use permit? Yes No c. Is a zoning change requested as part of the proposed action? Yes No If Yes, LWhat is the proposed new zoning for the site? ___________________________________________________________________ C.4. Existing community services. a. In what school district is the project site located? ________________________________________________________________ b. What police or other public protection forces serve the project site? _________________________________________________________________________________________________________ c. Which fire protection and emergency medical services serve the project site? __________________________________________________________________________________________________________ d. What parks serve the project site? __________________________________________________________________________________________________________ __________________________________________________________________________________________________________ D. Project Details D.1. Proposed and Potential Development a. What is the general nature of the proposed action (e.g., residential, industrial, commercial, recreational; if mixed, include all components)? _________________________________________________________________________________________________________ b. a. Total acreage of the site of the proposed action? _____________ acres b. Total acreage to be physically disturbed? _____________ acres c. Total acreage (project site and any contiguous properties) owned or controlled by the applicant or project sponsor? _____________ acres c. Is the proposed action an expansion of an existing project or use? Yes No LIf Yes, what is the approximate percentage of the proposed expansion and identify the units (e.g., acres, miles, housing units, square feet)? % ____________________ Units: ____________________ d. Is the proposed action a subdivision, or does it include a subdivision? Yes No If Yes, LPurpose or type of subdivision? (e.g., residential, industrial, commercial; if mixed, specify types) ________________________________________________________________________________________________________ LL Is a cluster/conservation layout proposed? Yes No LLLNumber of lots proposed? ________ LYMinimum and maximum proposed lot sizes? Minimum __________ Maximum __________ e. Will proposed action be constructed in multiple phases? Yes No LIf No, anticipated period of construction: _____ months LLIf Yes: x Total number of phases anticipated _____ x Anticipated commencement date of phase 1 (including demolition) _____ month _____ year x Anticipated completion date of final phase _____ month _____year x Generally describe connections or relationships among phases, including any contingencies where progress of one phase may determine timing or duration of future phases: _______________________________________________________________ ____________________________________________________________________________________________________ ____________________________________________________________________________________________________ ✔ The site is in the the City's Newman District (ND) which is a mixed use zoning district ✔ ✔ Ithaca City School District City of Ithaca Police City of Ithaca Fire Stewart Park 2.5 2 2 ✔ ✔ ✔ 6 The action includes a temporary maintenance activity (dredging) and the installation of a in stream sediment trap Page 4 of 13 f. Does the project include new residential uses? Yes No If Yes, show numbers of units proposed. One Family Two Family Three Family Multiple Family (four or more) Initial Phase ___________ ___________ ____________ ________________________ At completion of all phases ___________ ___________ ____________ ________________________ g. Does the proposed action include new non-residential construction (including expansions)? Yes No If Yes, L. Total number of structures ___________ LLDimensions (in feet) of largest proposed structure: ________height; ________width; and _______ length LLLApproximate extent of building space to be heated or cooled: ______________________ square feet h. Does the proposed action include construction or other activities that will result in the impoundment of any Yes No liquids, such as creation of a water supply, reservoir, pond, lake, waste lagoon or other storage? If Yes, LPurpose of the impoundment: ________________________________________________________________________________ LLIf a water impoundment, the principal source of the water: Ground water Surface water streams Other specify: _________________________________________________________________________________________________________ LLLIf other than water, identify the type of impounded/contained liquids and their source. _________________________________________________________________________________________________________ LYApproximate size of the proposed impoundment. Volume: ____________ million gallons; surface area: ____________ acres YDimensions of the proposed dam or impounding structure: ________ height; _______ length YLConstruction method/materials for the proposed dam or impounding structure (e.g., earth fill, rock, wood, concrete): ________________________________________________________________________________________________________ D.2. Project Operations a. Does the proposed action include any excavation, mining, or dredging, during construction, operations, or both? Yes No (Not including general site preparation, grading or installation of utilities or foundations where all excavated materials will remain onsite) If Yes: LWhat is the purpose of the excavation or dredging? _______________________________________________________________ LLHow much material (including rock, earth, sediments, etc.) is proposed to be removed from the site? x Volume (specify tons or cubic yards): ____________________________________________ x Over what duration of time? ____________________________________________________ LLLDescribe nature and characteristics of materials to be excavated or dredged, and plans to use, manage or dispose of them. ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ iYWill there be onsite dewatering or processing of excavated materials? Yes No If yes, describe. ___________________________________________________________________________________________ ________________________________________________________________________________________________________ YWhat is the total area to be dredged or excavated? _____________________________________acres YLWhat is the maximum area to be worked at any one time? _______________________________ acres YLLWhat would be the maximum depth of excavation or dredging? __________________________ feet YLLLWill the excavation require blasting? Yes No L[Summarize site reclamation goals and plan: _____________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ b. Would the proposed action cause or result in alteration of, increase or decrease in size of, or encroachment Yes No into any existing wetland, waterbody, shoreline, beach or adjacent area? If Yes: LIdentify the wetland or waterbody which would be affected (by name, water index number, wetland map number or geographic description): ______________________________________________________________________________________________ BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB ✔ ✔ ✔ ✔ Flood protection and recreational access 12-18,000 CY 3 months The sediments will be a combination of gravel and fines . After drying it will be either disposed of or used for a beneficial use near the site pending a beneficial use determination by the NYSDEC ✔ The sediments will be placed and allowed to dry on the adjacent property .08 acres TBD in some areas 4.9 ✔ ✔ Cascadilla Creek Page 5 of 13 LLDescribe how the proposed action would affect that waterbody or wetland, e.g. excavation, fill, placement of structures, or alteration of channels, banks and shorelines. Indicate extent of activities, alterations and additions in square feet or acres: _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ LLLWill proposed action cause or result in disturbance to bottom sediments? Yes No If Yes, describe: __________________________________________________________________________________________ LYWill proposed action cause or result in the destruction or removal of aquatic vegetation? Yes No If Yes: x aFUHV of DTXDWLFvegetation proposed to be removed ___________________________________________________________ x H[SHFWHG acreage of aquatic vegetation remaining after project completion________________________________________ x purpose of proposed removal (e.g. beach clearing, invasive species control, boat access): ____________________________ ____________________________________________________________________________________________________ x proposed method of plant removal: ________________________________________________________________________ x if chemical/herbicide treatment will be used, specify product(s): _________________________________________________ YDescribe any proposed reclamation/mitigation following disturbance: _________________________________________________ _________________________________________________________________________________________________________ c. Will the proposed action use, or create a new demand for water? Yes No If Yes: LTotal anticipated water usage/demand per day: __________________________ gallons/day LLWill the proposed action obtain water from an existing public water supply? Yes No If Yes: x Name of district or service area: _________________________________________________________________________ x Does the existing public water supply have capacity to serve the proposal? Yes No x Is the project site in the existing district? Yes No x Is expansion of the district needed? Yes No x Do existing lines serve the project site? Yes No LLLWill line extension within an existing district be necessary to supply the project? Yes No If Yes: x Describe extensions or capacity expansions proposed to serve this project: ________________________________________ ____________________________________________________________________________________________________ x Source(s) of supply for the district: ________________________________________________________________________ LYIs a new water supply district or service area proposed to be formed to serve the project site? Yes No If, Yes: x Applicant/sponsor for new district: ________________________________________________________________________ x Date application submitted or anticipated: __________________________________________________________________ x Proposed source(s) of supply for new district: _______________________________________________________________ YIf a public water supply will not be used, describe plans to provide water supply for the project: ___________________________ _________________________________________________________________________________________________________ YL. If water supply will be from wells (public or private), maximum pumping capacity: _______ gallons/minute. d. Will the proposed action generate liquid wastes? Yes No If Yes: LTotal anticipated liquid waste generation per day: _______________ gallons/day LLNature of liquid wastes to be generated (e.g., sanitary wastewater, industrial; if combination, describe all components and approximate volumes or proportions of each): __________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ LLLWill the proposed action use any existing public wastewater treatment facilities? Yes No If Yes: x Name of wastewater treatment plant to be used: _____________________________________________________________ x Name of district: ______________________________________________________________________________________ x Does the existing wastewater treatment plant have capacity to serve the project? Yes No x Is the project site in the existing district? Yes No x Is expansion of the district needed? Yes No Portions of the bottom of Cascadilla Creek will be mechanically dredged to remove accumulated sediments ✔ Mechanical Dredging ✔ .08 or less removal as a result of dredging for flood control & boat access mechanical dredging None proposed ✔ ✔ ✔ Page 6 of 13 x Do existing sewer lines serve the project site? Yes No x Will line extension within an existing district be necessary to serve the project? Yes No If Yes: x Describe extensions or capacity expansions proposed to serve this project: ____________________________________ ____________________________________________________________________________________________________ ____________________________________________________________________________________________________ LYWill a new wastewater (sewage) treatment district be formed to serve the project site? Yes No If Yes: x Applicant/sponsor for new district: ____________________________________________________________________ x Date application submitted or anticipated: _______________________________________________________________ x What is the receiving water for the wastewater discharge? __________________________________________________ YIf public facilities will not be used, describe plans to provide wastewater treatment for the project, including specifying proposed receiving water (name and classification if surface discharge, or describe subsurface disposal plans): ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ YLDescribe any plans or designs to capture, recycle or reuse liquid waste: _______________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ e. Will the proposed action disturb more than one acre and create stormwater runoff, either from new point Yes No sources (i.e. ditches, pipes, swales, curbs, gutters or other concentrated flows of stormwater) or non-point source (i.e. sheet flow) during construction or post construction? If Yes: LHow much impervious surface will the project create in relation to total size of project parcel? _____ Square feet or _____ acres (impervious surface) _____ Square feet or _____ acres (parcel size) LLDescribe types of new point sources. __________________________________________________________________________ _________________________________________________________________________________________________________ LLLWhere will the stormwater runoff be directed (i.e. on-site stormwater management facility/structures, adjacent properties, groundwater, on-site surface water or off-site surface waters)? ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ x If to surface waters, identify receiving water bodies or wetlands: ________________________________________________ ____________________________________________________________________________________________________ ____________________________________________________________________________________________________ x Will stormwater runoff flow to adjacent properties? Yes No LYDoes proposed plan minimize impervious surfaces, use pervious materials or collect and re-use stormwater? Yes No f. Does the proposed action include, or will it use on-site, one or more sources of air emissions, including fuel Yes No combustion, waste incineration, or other processes or operations? If Yes, identify: L. Mobile sources during project operations (e.g., heavy equipment, fleet or delivery vehicles) _________________________________________________________________________________________________________ LLStationary sources during construction (e.g., power generation, structural heating, batch plant, crushers) ________________________________________________________________________________________________________ LLLStationary sources during operations (e.g., process emissions, large boilers, electric generation) ________________________________________________________________________________________________________ g. Will any air emission sources named in D.2.f (above), require a NY State Air Registration, Air Facility Permit, Yes No or Federal Clean Air Act Title IV or Title V Permit? If Yes: LIs the project site located in an Air quality non-attainment area? (Area routinely or periodically fails to meet Yes No ambient air quality standards for all or some parts of the year) LLIn addition to emissions as calculated in the application, the project will generate: x ___________Tons/year (VKRUWWRQV) of Carbon Dioxide (CO2) x ___________Tons/year (VKRUWWRQV) of Nitrous Oxide (N22) x ___________Tons/year (VKRUWWRQV) of Perfluorocarbons (PFCs) x ___________Tons/year (VKRUWWRQV) of Sulfur Hexafluoride (SF6) x ___________Tons/year (VKRUWWRQV) of Carbon Dioxide equivalent of HydrofloXrocarbons (H)&V) x ___________Tons/year (VKRUWWRQV) of Hazardous Air Pollutants (HAPs) ✔ ✔ ✔ The project will require use of a mechanical dredge/ excavator. After drying the sediments will be removed by truck ✔ ✔ Page 7 of 13 h. Will the proposed action generate or emit methane (including, but not limited to, sewage treatment plants, Yes No landfills, composting facilities)? If Yes: LEstimate methane generation in tons/year (metric): ________________________________________________________________ LL. Describe any methane capture, control or elimination measures included in project design (e.g., combustion to generate heat or electricity, flaring): ________________________________________________________________________________________ _________________________________________________________________________________________________________ i. Will the proposed action result in the release of air pollutants from open-air operations or processes, such as Yes No quarry or landfill operations? If Yes: Describe operations and nature of emissions (e.g., diesel exhaust, rock particulates/dust): _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ j. Will the proposed action result in a substantial increase in traffic above present levels or generate substantial Yes No new demand for transportation facilities or services? If Yes: LWhen is the peak traffic expected (Check all that apply): Morning Evening Weekend Randomly between hours of __________ to ________. LLFor commercial activities only, projected number of semi-trailer truck trips/day: _______________________ LLLParking spaces: Existing _____________ Proposed ___________ Net increase/decrease _____________ LYDoes the proposed action include any shared use parking? Yes No YIf the proposed action includes any modification of existing roads, creation of new roads or change in existing access, describe: ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ YLAre public/private transportation service(s) or facilities available within ½ mile of the proposed site? Yes No YLL Will the proposed action include access to public transportation or accommodations for use of hybrid, electric Yes No or other alternative fueled vehicles? YLLL.Will the proposed action include plans for pedestrian or bicycle accommodations for connections to existing Yes No pedestrian or bicycle routes? k. Will the proposed action (for commercial or industrial projects only) generate new or additional demand Yes No for energy? If Yes: LEstimate annual electricity demand during operation of the proposed action: ____________________________________________ _________________________________________________________________________________________________________ LLAnticipated sources/suppliers of electricity for the project (e.g., on-site combustion, on-site renewable, via grid/local utility, or other): ________________________________________________________________________________________________________ LLLWill the proposed action require a new, or an upgrade to, an existing substation? Yes No l. Hours of operation. Answer all items which apply. L During Construction:LLDuring Operations: x Monday - Friday: _________________________x Monday - Friday: ____________________________ x Saturday: ________________________________x Saturday: ___________________________________ x Sunday: _________________________________x Sunday: ____________________________________ x Holidays: ________________________________x Holidays: ___________________________________ ✔ ✔ Temporary diesel exhaust from mechanical dredging. Temporary diesel exhaust from truck hauling of dried sediments. ✔ ✔ ✔ 7am - 5pm N/A N/A N/A N/A N/A N/A N/A Page 8 of 13 m. Will the proposed action produce noise that will exceed existing ambient noise levels during construction, Yes No operation, or both? If yes: LProvide details including sources, time of day and duration: _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ LL. Will proposed action remove existing natural barriers that could act as a noise barrier or screen? Yes No Describe: _________________________________________________________________________________________________ _________________________________________________________________________________________________________ n. Will the proposed action have outdoor lighting? Yes No If yes: LDescribe source(s), location(s), height of fixture(s), direction/aim, and proximity to nearest occupied structures: _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ LL.Will proposed action remove existing natural barriers that could act as a light barrier or screen? Yes No Describe: _________________________________________________________________________________________________ _________________________________________________________________________________________________________ oDoes the proposed action have the potential to produce odors for more than one hour per day? Yes No If Yes, describe possible sources, potential frequency and duration of odor emissions, and proximity to nearest occupied structures: ______________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ p. Yes No Will the proposed action include any bulk storage of petroleum (FRPELQHGFDSDFLW\RIover 1,100 gallons) or chemical productsJDOORQVLQDERYHJURXQGVWRUDJHRUDQ\DPRXQWLQXQGHUJURXQGVWRUDJH? If Yes: LProduct(s) to be stored ______________________________________________________________________________________ LLVolume(s) ______ per unit time ___________ (e.g., month, year) LLLGenerally describe proposed storage facilities ___________________________________________________________________ ________________________________________________________________________________________________________ q. Will the proposed action (commercial, industrial and recreational projects only) use pesticides (i.e., herbicides, Yes No insecticides) during construction or operation? If Yes: LDescribe proposed treatment(s): ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ LLWill the proposed action use Integrated Pest Management Practices? Yes No r. Will the proposed action (commercial or industrial projects only) involve or require the management or disposal Yes No of solid waste (excluding hazardous materials)? If Yes: LDescribe any solid waste(s) to be generated during construction or operation of the facility: x Construction: ____________________ tons per ________________ (unit of time) x Operation : ____________________ tons per ________________ (unit of time) LLDescribe any proposals for on-site minimization, recycling or reuse of materials to avoid disposal as solid waste: x Construction: ________________________________________________________________________________________ ____________________________________________________________________________________________________ x Operation: __________________________________________________________________________________________ ____________________________________________________________________________________________________ LLLProposed disposal methods/facilities for solid waste generated on-site: x Construction: ________________________________________________________________________________________ ____________________________________________________________________________________________________ x Operation: __________________________________________________________________________________________ ____________________________________________________________________________________________________ ✔ The project will produce noise during the duration of operation until complete (approx 3 months) ✔ ✔ ✔ ✔ Drying sediments may produce temporary odors. Dried sediment will be removed from the site within 3-6 month. There are no residences within 1,200 feet of the watering site. The closest occupied structures are offices and non-retail commercial buildings within 150-200 ft of the site ✔ ✔ ✔ 12-18,000 CY n/a total n/a Project is seeking a beneficial use determination for the sediments so that they can be reused within the metropolitan area n/a Sediments may be determined to be waste material and may require special handling and disposal under the guidance of NYSDEC Page 9 of 13 s. Does the proposed action include construction or modification of a solid waste management facility? Yes No If Yes: LType of management or handling of waste proposed for the site (e.g., recycling or transfer station, composting, landfill, or other disposal activities): ___________________________________________________________________________________ LLAnticipated rate of disposal/processing: x ________ Tons/month, if transfer or other non-combustion/thermal treatment, or x ________ Tons/hour, if combustion or thermal treatment LLLIf landfill, anticipated site life: ________________________________ years t. Will proposed action at the site involve the commercial generation, treatment, storage, or disposal of hazardous Yes No waste? If Yes: LName(s) of all hazardous wastes or constituents to be generated, handled or managed at facility: ___________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ LLGenerally describe processes or activities involving hazardous wastes or constituents: ___________________________________ _________________________________________________________________________________________________________ ________________________________________________________________________________________________________ LLL. Specify amount to be handled or generated _____ tons/month LYDescribe any proposals for on-site minimization, recycling or reuse of hazardous constituents: ____________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ YWill any hazardous wastes be disposed at an existing offsite hazardous waste facility? Yes No If Yes: provide name and location of facility: _______________________________________________________________________ ________________________________________________________________________________________________________ If No: describe proposed management of any hazardous wastes which will not be sent to a hazardous waste facility: ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ E. Site and Setting of Proposed Action E.1. Land uses on and surrounding the project site a. Existing land uses. LCheck all uses that occur on, adjoining and near the project site. Urban Industrial Commercial Residential (suburban) Rural (non-farm) Forest Agriculture Aquatic Other (specify): ____________________________________ LLIf mix of uses, generally describe: __________________________________________________________________________________________________________ __________________________________________________________________________________________________________ b. Land uses and covertypes on the project site. Land use or Covertype Current Acreage Acreage After Project Completion Change (Acres +/-) x Roads, buildings, and other paved or impervious surfaces x Forested x Meadows, grasslands or brushlands (non- agricultural, including abandoned agricultural) x Agricultural (includes active orchards, field, greenhouse etc.) x Surface water features (lakes, ponds, streams, rivers, etc.) x Wetlands (freshwater or tidal) x Non-vegetated (bare rock, earth or fill) x Other Describe: _______________________________ ________________________________________ ✔ ✔ ✔✔✔ ✔ 2.5 2.5 No Change 3.6 3.6 No Change Page 10 of 13 c. Is the project site presently used by members of the community for public recreation? Yes No LIf Yes: explain: __________________________________________________________________________________________ d. Are there any facilities serving children, the elderly, people with disabilities (e.g., schools, hospitals, licensed Yes No day care centers, or group homes) within 1500 feet of the project site? If Yes, LIdentify Facilities: ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ e. Does the project site contain an existing dam? Yes No If Yes: LDimensions of the dam and impoundment: x Dam height: _________________________________ feet x Dam length: _________________________________ feet x Surface area: _________________________________ acres x Volume impounded: _______________________________ gallons OR acre-feet LLDam=s existing hazard classification: _________________________________________________________________________ LLLProvide date and summarize results of last inspection: _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ f. Has the project site ever been used as a municipal, commercial or industrial solid waste management facility, Yes No or does the project site adjoin property which is now, or was at one time, used as a solid waste management facility? If Yes: L Has the facility been formally closed? Yes No x If yes, cite sources/documentation: _______________________________________________________________________ LLDescribe the location of the project site relative to the boundaries of the solid waste management facility: _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ LLLDescribe any development constraints due to the prior solid waste activities: __________________________________________ _______________________________________________________________________________________________________ g. Have hazardous wastes been generated, treated and/or disposed of at the site, or does the project site adjoin Yes No property which is now or was at one time used to commercially treat, store and/or dispose of hazardous waste? If Yes: LDescribe waste(s) handled and waste management activities, including approximate time when activities occurred: _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ h. Potential contamination history. Has there been a reported spill at the proposed project site, or have any Yes No remedial actions been conducted at or adjacent to the proposed site? If Yes: LIs any portion of the site listed on the NYSDEC Spills Incidents database or Environmental Site Yes No Remediation database? Check all that apply: Yes – Spills Incidents database Provide DEC ID number(s): ________________________________ Yes – Environmental Site Remediation database Provide DEC ID number(s): ________________________________ Neither database LLIf site has been subject of RCRA corrective activities, describe control measures:_______________________________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ LLLIs the project within 2000 feet of any site in the NYSDEC Environmental Site Remediation database? Yes No If yes, provide DEC ID number(s): ______________________________________________________________________________ LYIf yes to (i), (ii) or (iii) above, describe current status of site(s): _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ ✔ Cascadilla Creek is used for boating ✔ There are several group homes in the neighborhood closest to the project site, some of which may be within 1,500 ft. ✔ ✔ ✔ The adjacent site (on land) was a manufactured gas plant from 1927-1932. There is historic subsurface contamination due to those activities. ✔ ✔ ✔755006 ✔ 755006 , C755019A, 755004 755006 - According the to DEC Data base a ROD was signed for the site in 2011. C755019A - This site is under view for remediation. 755004- soil removal complete. Testing in 1984 did not reveal the presence of hazardous waste on site Page 11 of 13 YIs the project site subject to an institutional control limiting property uses? Yes No x If yes, DEC site ID number: ____________________________________________________________________________ x Describe the type of institutional control (e.g., deed restriction or easement): ____________________________________ x Describe any use limitations: ___________________________________________________________________________ x Describe any engineering controls: _______________________________________________________________________ x Will the project affect the institutional or engineering controls in place? Yes No x Explain: ____________________________________________________________________________________________ ___________________________________________________________________________________________________ ___________________________________________________________________________________________________ E.2. Natural Resources On or Near Project Site a. What is the average depth to bedrock on the project site? ________________ feet b. Are there bedrock outcroppings on the project site? Yes No If Yes, what proportion of the site is comprised of bedrock outcroppings? __________________% c. Predominant soil type(s) present on project site: ___________________________ __________% ___________________________ __________% ____________________________ __________% d. What is the average depth to the water table on the project site? Average: _________ feet e. Drainage status of project site soils: Well Drained: _____% of Vite Moderately Well Drained: _____% of site Poorly Drained _____% of Vite f. Approximate proportion of proposed action site with slopes: 0-10%: _____% of site 10-15%: _____% of site 15% or greater: _____% of site g. Are there any unique geologic features on the project site? Yes No If Yes, describe: _____________________________________________________________________________________________ ________________________________________________________________________________________________________ h. Surface water features. LDoes any portion of the project site contain wetlands or other waterbodies (including streams, rivers, Yes No ponds or lakes)? LLDo any wetlands or other waterbodies adjoin the project site? Yes No If Yes to either L or LL, continue. If No, skip to E.2.i. LLLAre any of the wetlands or waterbodies within or adjoining the project site regulated by any federal, Yes No state or local agency? LYFor each identified UHJXODWHGwetland and waterbody on the project site, provide the following information x Streams:Name ____________________________________________ Classification _______________________ Lakes or Ponds: Name ____________________________________________ Classification _______________________t Wetlands:Name ____________________________________________ Approximate Size ___________________ Wetland No. (if regulated by DEC) _____________________________ YAre any of the above water bodies listed in the most recent compilation of NYS water quality-impaired Yes No waterbodies? If yes, name of impaired water body/bodies and basis for listing as impaired: _____________________________________________ ___________________________________________________________________________________________________________ i. Is the project site in a designated Floodway? Yes No j. Is the project site in the 100 year Floodplain? Yes No k. Is the project site in the 500 year Floodplain? Yes No l. Is the project site located over, or immediately adjoining, a primary, principal or sole source aquifer? Yes No If Yes: LName of aquifer: _________________________________________________________________________________________ ✔ +100 ft ✔ Creek bottom sediments - mostly silt 3-0 ✔ ✔ ✔ ✔ ✔ ✔ C898-311 Federal Waters, Federal Waters, Federal Waters,... ✔ ✔ ✔ ✔ ✔ Page 12 of 13 m. Identify the predominant wildlife species that occupy or use the project site: ______________________________ ______________________________ _______________________________ ______________________________ ______________________________ _______________________________ ______________________________ n. Does the project site contain a designated significant natural community? Yes No If Yes: LDescribe the habitat/community (composition, function, and basis for designation): _____________________________________ ________________________________________________________________________________________________________ LLSource(s) of description or evaluation: ________________________________________________________________________ LLLExtent of community/habitat: x Currently: ______________________ acres x Following completion of project as proposed: _____________________ acres x Gain or loss (indicate + or -): ______________________ acres o. Does project site contain any species of plant or animal that is listed by the federal government or NYS as Yes No endangered or threatened, or does it contain any areas identified as habitat for an endangered or threatened species? p. Does the project site contain any species of plant or animal that is listed by NYS as rare, or as a species of Yes No special concern? q. Is the project site or adjoining area currently used for hunting, trapping, fishing or shell fishing? Yes No If yes, give a brief description of how the proposed action may affect that use: ___________________________________________ ________________________________________________________________________________________________________ E.3. Designated Public Resources On or Near Project Site a. Is the project site, or any portion of it, located in a designated agricultural district certified pursuant to Yes No Agriculture and Markets Law, Article 25-AA, Section 303 and 304? If Yes, provide county plus district name/number: _________________________________________________________________ b. Are agricultural lands consisting of highly productive soils present? Yes No LIf Yes: acreage(s) on project site? ___________________________________________________________________________ LLSource(s) of soil rating(s): _________________________________________________________________________________ c. Does the project site contain all or part of, or is it substantially contiguous to, a registered National Yes No Natural Landmark? If Yes: LNature of the natural landmark: Biological Community Geological Feature LLProvide brief description of landmark, including values behind designation and approximate size/extent: ___________________ ________________________________________________________________________________________________________ ________________________________________________________________________________________________________ d. Is the project site located in or does it adjoin a state listed Critical Environmental Area? Yes No If Yes: LCEA name: _____________________________________________________________________________________________ LLBasis for designation: _____________________________________________________________________________________ LLLDesignating agency and date: ______________________________________________________________________________ Variety of aquatic species ✔ ✔ ✔ ✔ Limited recreational fishing is done in Cascadilla Creek and the adjacent waterway ✔ ✔ ✔ ✔ EEAF Mapper Summary Report Friday, March 23, 2018 3:09 PM Disclaimer:The EAF Mapper is a screening tool intended to assist project sponsors and reviewing agencies in preparing an environmental assessment form (EAF). Not all questions asked in the EAF are answered by the EAF Mapper. Additional information on any EAF question can be obtained by consulting the EAF Workbooks. Although the EAF Mapper provides the most up-to-date digital data available to DEC, you may also need to contact local or other data sources in order to obtain data not provided by the Mapper. Digital data is not a substitute for agency determinations. B.i.i [Coastal or Waterfront Area] No B.i.ii [Local Waterfront Revitalization Area] No C.2.b. [Special Planning District] Yes - Digital mapping data are not available for all Special Planning Districts. Refer to EAF Workbook. C.2.b. [Special Planning District - Name] Remediaton Sites:755006 E.1.h [DEC Spills or Remediation Site - Potential Contamination History] Yes - Digital mapping data for Spills Incidents are not available for this location. Refer to EAF Workbook. E.1.h.i [DEC Spills or Remediation Site - Listed] Yes E.1.h.i [DEC Spills or Remediation Site - Environmental Site Remediation Database] Yes E.1.h.i [DEC Spills or Remediation Site - DEC ID Number] 755006 E.1.h.iii [Within 2,000' of DEC Remediation Site] Yes E.1.h.iii [Within 2,000' of DEC Remediation Site - DEC ID] 755006 , C755019A, 755004 E.2.g [Unique Geologic Features] No E.2.h.i [Surface Water Features] Yes E.2.h.ii [Surface Water Features] Yes E.2.h.iii [Surface Water Features] Yes - Digital mapping information on local and federal wetlands and waterbodies is known to be incomplete. Refer to EAF Workbook. E.2.h.iv [Surface Water Features - Stream Name] 898-311 E.2.h.iv [Surface Water Features - Stream Classification] C E.2.h.iv [Surface Water Features - Wetlands Name] Federal Waters 1Full Environmental Assessment Form - EAF Mapper Summary Report E.2.h.v [Impaired Water Bodies] No E.2.i. [Floodway] Digital mapping data are not available or are incomplete. Refer to EAF Workbook. E.2.j. [100 Year Floodplain] Digital mapping data are not available or are incomplete. Refer to EAF Workbook. E.2.k. [500 Year Floodplain] Digital mapping data are not available or are incomplete. Refer to EAF Workbook. E.2.l. [Aquifers] No E.2.n. [Natural Communities] No E.2.o. [Endangered or Threatened Species] No E.2.p. [Rare Plants or Animals] No E.3.a. [Agricultural District] No E.3.c. [National Natural Landmark] No E.3.d [Critical Environmental Area] No E.3.e. [National Register of Historic Places] Digital mapping data are not available or are incomplete. Refer to EAF Workbook. E.3.f. [Archeological Sites] Yes E.3.i. [Designated River Corridor] No 2Full Environmental Assessment Form - EAF Mapper Summary Report Page 1 of 10 Full Environmental Assessment Form Part 2 - Identification of Potential Project Impacts Part 2 is to be completed by the lead agency. Part 2 is designed to help the lead agency inventory all potential resources that could be affected by a proposed project or action. We recognize that the lead agency=s reviewer(s) will not necessarily be environmental professionals. So, the questions are designed to walk a reviewer through the assessment process by providing a series of questions that can be answered using the information found in Part 1. To further assist the lead agency in completing Part 2, the form identifies the most relevant questions in Part 1 that will provide the information needed to answer the Part 2 question. When Part 2 is completed, the lead agency will have identified the relevant environmental areas that may be impacted by the proposed activity. If the lead agency is a state agency and the action is in any Coastal Area, complete the Coastal Assessment Form before proceeding with this assessment. Tips for completing Part 2: x Review all of the information provided in Part 1. x Review any application, maps, supporting materials and the Full EAF Workbook. x Answer each of the 18 questions in Part 2. x If you answer “Yes” to a numbered question, please complete all the questions that follow in that section. x If you answer “No” to a numbered question, move on to the next numbered question. x Check appropriate column to indicate the anticipated size of the impact. x Proposed projects that would exceed a numeric threshold contained in a question should result in the reviewing agency checking the box “Moderate to large impact may occur.” x The reviewer is not expected to be an expert in environmental analysis. x If you are not sure or undecided about the size of an impact, it may help to review the sub-questions for the general question and consult the workbook. x When answering a question consider all components of the proposed activity, that is, the Awhole action@. x Consider the possibility for long-term and cumulative impacts as well as direct impacts. x Answer the question in a reasonable manner considering the scale and context of the project. 1. Impact on Land Proposed action may involve construction on, or physical alteration of, NO ? YES the land surface of the proposed site. (See Part 1. D.1) ,I³<HV´DQVZHUTXHVWLRQVDM,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may involve construction on land where depth to water table is less than 3 feet.E2d 9 b. The proposed action may involve construction on slopes of 15% or greater.E2f 9 c. The proposed action may involve construction on land where bedrock is exposed, or generally within 5 feet of existing ground surface. E2a 9 d. The proposed action may involve the excavation and removal of more than 1,000 tons of natural material. D2a 9 e. The proposed action may involve construction that continues for more than one year or in multiple phases. D1e 9 f. The proposed action may result in increased erosion, whether from physical disturbance or vegetation removal (including from treatment by herbicides). D2e, D2q 9 g. The proposed action is, or may be, located within a Coastal Erosion hazard area.B1i 9 h. Other impacts: _______________________________________________________ ___________________________________________________________________ 9 &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 2 of 10 2. Impact on Geological Features The proposed action may result in the modification or destruction of, or inhibit access to, any unique or unusual land forms on the site (e.g., cliffs, dunes, NO YES minerals, fossils, caves). (See Part 1. E.2.g) ,I³<HV´DQVZHUTXHVWLRQVDF,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. Identify the specific land form(s) attached: ________________________________ ___________________________________________________________________ E2g b. The proposed action may affect or is adjacent to a geological feature listed as a registered National Natural Landmark. Specific feature: _____________________________________________________ E3c c. Other impacts: ______________________________________________________ ___________________________________________________________________ 3. Impacts on Surface Water The proposed action may affect one or more wetlands or other surface water NO ? YES bodies (e.g., streams, rivers, ponds or lakes). (See Part 1. D.2, E.2.h) ,I³<HV´DQVZHUTXHVWLRQVDO,I³1R´PRYHRQWR6HFWLRQ. Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may create a new water body. D2b, D1h 9 b. The proposed action may result in an increase or decrease of over 10% or more than a 10 acre increase or decrease in the surface area of any body of water. D2b 9 c. The proposed action may involve dredging more than 100 cubic yards of material from a wetland or water body. D2a 9 d. The proposed action may involve construction within or adjoining a freshwater or tidal wetland, or in the bed or banks of any other water body. E2h 9 e. The proposed action may create turbidity in a waterbody, either from upland erosion, runoff or by disturbing bottom sediments. D2a, D2h 9 f. The proposed action may include construction of one or more intake(s) for withdrawal of water from surface water. D2c 9 g. The proposed action may include construction of one or more outfall(s) for discharge of wastewater to surface water(s). D2d 9 h. The proposed action may cause soil erosion, or otherwise create a source of stormwater discharge that may lead to siltation or other degradation of receiving water bodies. D2e 9 i. The proposed action may affect the water quality of any water bodies within or downstream of the site of the proposed action. E2h 9 j. The proposed action may involve the application of pesticides or herbicides in or around any water body. D2q, E2h 9 k. The proposed action may require the construction of new, or expansion of existing, wastewater treatment facilities. D1a, D2d 9 &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 3 of 10 l. Other impacts: _______________________________________________________ ___________________________________________________________________ 4. Impact on groundwater The proposed action may result in new or additional use of ground water, or ? NO YES may have the potential to introduce contaminants to ground water or an aquifer. (See Part 1. D.2.a, D.2.c, D.2.d, D.2.p, D.2.q, D.2.t) ,I³<HV´DQVZHUTXHVWLRQVDK,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may require new water supply wells, or create additional demand on supplies from existing water supply wells. D2c b. Water supply demand from the proposed action may exceed safe and sustainable withdrawal capacity rate of the local supply or aquifer. Cite Source: ________________________________________________________ D2c c. The proposed action may allow or result in residential uses in areas without water and sewer services. D1a, D2c d. The proposed action may include or require wastewater discharged to groundwater.D2d, E2l e. The proposed action may result in the construction of water supply wells in locations where groundwater is, or is suspected to be, contaminated. D2c, E1f, E1g, E1h f. The proposed action may require the bulk storage of petroleum or chemical products over ground water or an aquifer. D2p, E2l g. The proposed action may involve the commercial application of pesticides within 100 feet of potable drinking water or irrigation sources. E2h, D2q, E2l, D2c h. Other impacts: ______________________________________________________ __________________________________________________________________ 5. Impact on Flooding The proposed action may result in development on lands subject to flooding. NO ? YES (See Part 1. E.2) ,I³<HV´DQVZHUTXHVWLRQVDJ,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may result in development in a designated floodway.E2i 9 b. The proposed action may result in development within a 100 year floodplain.E2j 9 c. The proposed action may result in development within a 500 year floodplain.E2k 9 d. The proposed action may result in, or require, modification of existing drainage patterns. D2b, D2e 9 e. The proposed action may change flood water flows that contribute to flooding.D2b, E2i, E2j, E2k 9 f. If there is a dam located on the site of the proposed action, is the dam [has failed to meet one or more safety criteria on its most recent inspection] in need of repair or E1e &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 4 of 10 upgrade? g. Other impacts: ______________________________________________________ ___________________________________________________________________ 6. Impacts on Air The proposed action may include a state regulated air emission source. NO ;YES (See Part 1. D.2.f., D,2,h, D.2.g) ,I³<HV´DQVZHUTXHVWLRQVDI,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. If the proposed action requires federal or state air emission permits, the action may also emit one or more greenhouse gases at or above the following levels: i. More than 1000 tons/year of carbon dioxide (CO2) ii. More than 3.5 tons/year of nitrous oxide (N2[0] O) iii. More than 1000 tons/year of carbon equivalent of perfluorocarbons (PFCs) iv. More than .045 tons/year of sulfur hexafluoride (SF6) v. More than 1000 tons/year of carbon dioxide equivalent of [hydrochloroflurocarbons (HCFCs)] hydrochloroflourocarbons (HFCs) emissions vi. 43 tons/year or more of methane D2g D2g D2g D2g D2g D2h b. The proposed action may generate 10 tons/year or more of any one designated hazardous air pollutant, or 25 tons/year or more of any combination of such hazardous air pollutants. D2g 9 c. The proposed action may require a state air registration, or may produce an emissions rate of total contaminants that may exceed 5 lbs. per hour, or may include a heat source capable of producing more than 10 million BTU=s per hour. [D2f,] D2g 9 d. The proposed action may reach 50% of any [two or more] of the thresholds in “a” through “c”, above. [D1g, D2k] D2g 9 e. The proposed action may result in the combustion or thermal treatment of more than 1 ton of refuse per hour. D2s 9 f. Other impacts:0DFKLQHUQ\XVHGIRUGUHGJLQJDQGKDXOLQJZLOOFRPEXVWGLHVHOIXHO __________________________________________________________________ 9 7.Impact on Plants and Animals The proposed action may result in a loss of flora or fauna. (See Part 1. E.2. m.-q.) NO ;<(6 ,I³<HV´DQVZHUTXHVWLRQVDM,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a.The proposed action may cause reduction in population or loss of individuals of any threatened or endangered species, as listed by New York State or the Federal government, that use the site, or are found on, over, or near the site. E2o 9 b. The proposed action may result in a reduction or degradation of any habitat used by any rare, threatened or endangered species, as listed by New York State or the federal government. E2o 9 c. The proposed action may cause reduction in population, or loss of individuals, of any species of special concern or conservation need, as listed by New York State or the Federal government, that use the site, or are found on, over, or near the site. E2p 9 d. The proposed action may result in a reduction or degradation of any habitat used by any species of special concern and conservation need, as listed by New York State or E2p 9 &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 5 of 10 the Federal government. e. The proposed action may diminish the capacity of a registered National Natural Landmark to support the biological community it was established to protect. E3c 9 f. The proposed action may result in the removal of, or ground disturbance in, any portion of a designated significant natural community. Source: ____________________________________________________________ E2n 9 g. The proposed action may substantially interfere with nesting/breeding, foraging, or over-wintering habitat for the predominant species that occupy or use the project site.E2m 9 h. The proposed action requires the conversion of more than 10 acres of forest, grassland or any other regionally or locally important habitat. Habitat type & information source: ______________________________________ __________________________________________________________________ E1b 9 i. Proposed action (commercial, industrial or recreational projects, only) involves use of herbicides or pesticides. D2q 9 j. Other impacts: _7HPSRUDU\GLVWXUEDQFHRIILVKEUHHGLQJDUHDV___________________________________________________ __________________________________________________________________ 9 8. Impact on Agricultural Resources The proposed action may impact agricultural resources. (See Part 1. E.3.a. and b.)? NO YES ,I³<HV´DQVZHUTXHVWLRQVDK,I³1R´PRYHRQWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may impact soil classified within soil group 1 through 4 of the NYS Land Classification System. E2c, E3b b. The proposed action may sever, cross or otherwise limit access to agricultural land (includes cropland, hayfields, pasture, vineyard, orchard, etc). E1a, Elb c. The proposed action may result in the excavation or compaction of the soil profile of active agricultural land. E3b d. The proposed action may irreversibly convert agricultural land to non-agricultural uses, either more than 2.5 acres if located in an Agricultural District, or more than 10 acres if not within an Agricultural District. E1b, E3a e. The proposed action may disrupt or prevent installation of an agricultural land management system. El a, E1b f. The proposed action may result, directly or indirectly, in increased development potential or pressure on farmland. C2c, C3, D2c, D2d g. The proposed project is not consistent with the adopted municipal Farmland Protection Plan. C2c h. Other impacts: ________________________________________________________ &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 6 of 10 9. Impact on Aesthetic Resources The land use of the proposed action are obviously different from, or are in ? NO YES sharp contrast to, current land use patterns between the proposed project and a scenic or aesthetic resource. (Part 1. E.1.a, E.1.b, E.3.h.) ,I³<HV´DQVZHUTXHVWLRQVDJ,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. Proposed action may be visible from any officially designated federal, state, or local scenic or aesthetic resource. E3h b. The proposed action may result in the obstruction, elimination or significant screening of one or more officially designated scenic views. E3h, C2b c. The proposed action may be visible from publicly accessible vantage points: i. Seasonally (e.g., screened by summer foliage, but visible during other seasons) ii. Year round E3h d. The situation or activity in which viewers are engaged while viewing the proposed action is: i. Routine travel by residents, including travel to and from work ii. Recreational or tourism based activities E3h E2q, E1c e. The proposed action may cause a diminishment of the public enjoyment and appreciation of the designated aesthetic resource. E3h f. There are similar projects visible within the following distance of the proposed project: 0-1/2 mile ½ -3 mile 3-5 mile 5+ mile D1a, E1a, D1f, D1g g. Other impacts: ______________________________________________________ __________________________________________________________________ 10. Impact on Historic and Archeological Resources The proposed action may occur in or adjacent to a historic or archaeological ? NO YES resource. (Part 1. E.3.e, f. and g.) ,I³<HV´DQVZHUTXHVWLRQVDH,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may occur wholly or partially within, or substantially contiguous to, any buildings, archaeological site or district which is listed on or has been nominated by the NYS Board of Historic Preservation for inclusion on the State or National Register of Historic Places. E3e b. The proposed action may occur wholly or partially within, or substantially contiguous to, an area designated as sensitive for archaeological sites on the NY State Historic Preservation Office (SHPO) archaeological site inventory. E3f c. The proposed action may occur wholly or partially within, or substantially contiguous to, an archaeological site not included on the NY SHPO inventory. Source: ____________________________________________________________ E3g &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 7 of 10 d. Other impacts: ______________________________________________________ __________________________________________________________________ e. If any of the above (a-d) are answered “Yes”, continue with the following questions to help support conclusions in Part 3: i. The proposed action may result in the destruction or alteration of all or part of the site or property. ii. The proposed action may result in the alteration of the property’s setting or integrity. iii. The proposed action may result in the introduction of visual elements which are out of character with the site or property, or may alter its setting. E3e, E3g, E3f E3e, E3f, E3g, E1a, E1b E3e, E3f, E3g, E3h, C2, C3 11. Impact on Open Space and Recreation The proposed action may result in a loss of recreational opportunities or a NO ? YES reduction of an open space resource as designated in any adopted municipal open space plan. (See Part 1. C.2.c, E.1.c., E.2.q.) ,I³<HV´DQVZHUTXHVWLRQVDH,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may result in an impairment of natural functions, or “ecosystem services”, provided by an undeveloped area, including but not limited to stormwater storage, nutrient cycling, wildlife habitat. D2e, E1b E2h, E2m, E2o, E2n, E2p 9 b. The proposed action may result in the loss of a current or future recreational resource.C2a, E1c, C2c, E2q 9 c. The proposed action may eliminate open space or recreational resource in an area with few such resources. C2a, C2c E1c, E2q 9 d. The proposed action may result in loss of an area now used informally by the community as an open space resource. C2c, E1c 9 e.Other impacts:7HPRUDU\LPSDFWWRZDWHUXVHGIRUILVKLQJDQGZDWHUFUDIW __________________________________________________ _________________________________________________________________ 9 12. Impact on Critical Environmental Areas The proposed action may be located within or adjacent to a critical ? NO YES environmental area (CEA). (See Part 1. E.3.d) ,I³<HV´DQVZHUTXHVWLRQVDF,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may result in a reduction in the quantity of the resource or characteristic which was the basis for designation of the CEA. E3d b. The proposed action may result in a reduction in the quality of the resource or characteristic which was the basis for designation of the CEA. E3d c. Other impacts: ______________________________________________________ __________________________________________________________________ &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 8 of 10 13. Impact on Transportation The proposed action may result in a change to existing transportation systems. NO ;YES (See Part 1. D.2.j) ,I³<HV´DQVZHUTXHVWLRQVDJ,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. Projected traffic increase may exceed capacity of existing road network. D2j 9 b. The proposed action may result in the construction of paved parking area for 500 or more vehicles. D2j 9 c. The proposed action will degrade existing transit access.D2j 9 d. The proposed action will degrade existing pedestrian or bicycle accommodations.D2j 9 [f] e. The proposed action may alter the present pattern of movement of people or goods. D2j 9 [g] f. Other impacts: __7HPSRUDU\LQFUHDFHLQWUDIILFGXULQJKDXLQJRSHUDWLRQV ______________________________________________________________________________________________________________________ 9 14. Impact on Energy The proposed action may cause an increase in the use of any form of energy.? NO YES (See Part 1. D.2.k) ,I³<HV´DQVZHUTXHVWLRQVDH,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action will require a new, or an upgrade to an existing, substation. D2k b. The proposed action will require the creation or extension of an energy transmission or supply system to serve more than 50 single or two-family residences or to serve a commercial or industrial use. D1f, D1q, D2k c. The proposed action may utilize more than 2,500 MWhrs per year of electricity.D2k d. The proposed action may involve heating and/or cooling of more than 100,000 square feet of building area when completed. D1g e. Other Impacts: ________________________________________________________ ____________________________________________________________________ 15. Impact on Noise, Odor, and Light The proposed action may result in an increase in noise, odors, or outdoor lighting. NO ? YES (See Part 1. D.2.m., n., and o.) ,I³<HV´DQVZHUTXHVWLRQVDI,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may produce sound above noise levels established by local regulation. D2m 9 b. The proposed action may result in blasting within 1,500 feet of any residence, hospital, school, licensed day care center, or nursing home. D2m, E1d 9 c. The proposed action may result in routine odors for more than one hour per day. D2o 9 &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Page 9 of 10 d. The proposed action may result in light shining onto adjoining properties.D2n 9 e. The proposed action may result in lighting creating sky-glow brighter than existing area conditions. D2n, E1a 9 f. Other impacts: ______________________________________________________ __________________________________________________________________ 16. Impact on Human Health The proposed action may have an impact on human health from exposure NO YES to new or existing sources of contaminants. (See Part 1.D.2.q., E.1. d. f. g. and h.) ,I³<HV´DQVZHUTXHVWLRQVDP,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No,or small impact may cccur Moderate to large impact may occur a. The proposed action is located within 1500 feet of a school, hospital, licensed day care center, group home, nursing home or retirement community. E1d 9 b. The site of the proposed action is currently undergoing remediation.E1g, E1h 9 c. There is a completed emergency spill remediation, or a completed environmental site remediation on, or adjacent to, the site of the proposed action. E1g, E1h d. The site of the action is subject to an institutional control limiting the use of the property (e.g., easement[,] or deed restriction). E1g, E1h 9 e. The proposed action may affect institutional control measures that were put in place to ensure that the site remains protective of the environment and human health. E1g, E1h 9 f. The proposed action has adequate control measures in place to ensure that future generation, treatment and/or disposal of hazardous wastes will be protective of the environment and human health. D2t 9 g. The proposed action involves construction or modification of a solid waste management facility. D2q, E1f 9 h. The proposed action may result in the unearthing of solid or hazardous waste. D2q, E1f 9 i. The proposed action may result in an increase in the rate of disposal, or processing, of solid waste. D2r, D2s 9 j. The proposed action may result in excavation or other disturbance within 2000 feet of a site used for the disposal of solid or hazardous waste. E1f, E1g E1h k. The proposed action may result in the migration of explosive gases from a landfill site to adjacent off site structures. E1f, E1g 9 l. The proposed action may result in the release of contaminated leachate from the project site. D2s, E1f, D2r 9 m. Other impacts: __6RPH6HGLPHQWVDUH&ODVV%DQGSRVVLEO\&____________________________________________________ __________________________________________________________________ 9 &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ 9 9 Page 10 of 10 17. Consistency with Community Plans The proposed action is not consistent with adopted land use plans. ? NO YES (See Part 1. C.1, C.2. and C.3.) ,I³<HV´DQVZHUTXHVWLRQVDK,I³1R´JRWR6HFWLRQ Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action’s land use components may be different from, or in sharp contrast to, current surrounding land use pattern(s). C2, C3, D1a E1a, E1b b. The proposed action will cause the permanent population of the city, town or village in which the project is located to grow by more than 5%. C2 c. The proposed action is inconsistent with local land use plans or zoning regulations.C2, C2, C3 d. The proposed action is inconsistent with any County plans, or other regional land use plans. C2, C2 e. The proposed action may cause a change in the density of development that is not supported by existing infrastructure or is distant from existing infrastructure. C3, D1c, D1d, D1f, D1d, Elb f. The proposed action is located in an area characterized by low density development that will require new or expanded public infrastructure. C4, D2c, D2d D2j g. The proposed action may induce secondary development impacts (e.g., residential or commercial development not included in the proposed action) C2a h. Other: _____________________________________________________________ __________________________________________________________________ 18. Consistency with Community Character The proposed project is inconsistent with the existing community character. ? NO YES (See Part 1. C.2, C.3, D.2, E.3) ,I³<HV´DQVZHUTXHVWLRQVDJ,I³1R´SURFHHGWR3DUW Relevant Part I Question(s) No, or small impact may occur Moderate to large impact may occur a. The proposed action may replace or eliminate existing facilities, structures, or areas of historic importance to the community. E3e, E3f, E3g b. The proposed action may create a demand for additional community services (e.g. schools, police and fire) C4 c. The proposed action may displace affordable or low-income housing in an area where there is a shortage of such housing. C2, C3, D1f D1g, E1a d. The proposed action may interfere with the use or enjoyment of officially recognized or designated public resources. C2, E3 e. The proposed action is inconsistent with the predominant architectural scale and character. C2, C3 f. Proposed action is inconsistent with the character of the existing natural landscape. C2, C3 E1a, E1b E2g, E2h g. Other impacts: ______________________________________________________ __________________________________________________________________ &DVFDGLOOD&UHHN'UHGJLQJ 6HGLPHQW7UDS,QVWDOODWLRQ Upon review of the information recorded on this EAF, as noted, plus this additional support information and considering both the magnitude and importance of each identified potential impact, it is the conclusion of the as lead agency that: A. This project will result in no significant adverse impacts on the environment, and, therefore, an environmental impact statement need not be prepared. Accordingly, this negative declaration is issued. B. Although this project could have a significant adverse impact on the environment, that impact will be avoided or substantially mitigated because of the following conditions which will be required by the lead agency: There will, therefore, be no significant adverse impacts from the project as conditioned, and, therefore, this conditioned negative declaration is issued. A conditioned negative declaration may be used only for UNLISTED actions (see 6 NYCRR 617.d). C. This Project may result in one or more significant adverse impacts on the environment, and an environmental impact statement must be prepared to further assess the impact(s) and possible mitigation and to explore alternatives to avoid or reduce those impacts. Accordingly, this positive declaration is issued. Name of Action: Name of Lead Agency: Name of Responsible Officer in Lead Agency: Title of Responsible Officer: Signature of Responsible Officer in Lead Agency: Date: Signature of Preparer (if different from Responsible Officer) Date: For Further Information: Contact Person: Address: Telephone Number: E-mail: For Type 1 Actions and Conditioned Negative Declarations, a copy of this Notice is sent to: Chief Executive Officer of the political subdivision in which the action will be principally located (e.g., Town / City / Village of) Other involved agencies (if any) Applicant (if any) Environmental Notice Bulletin: http://www.dec.ny.gov/enb/enb.html 1BHFPGPRINT FULL FORM City of Ithaca Department of Public Works 108 East Green Street Ithaca, New York March 2018 Prepared for DASNY in reference to New York State Capital Assistance Program - City of Ithaca #3849 Prepared by T.G. Miller, P.C Ithaca, New York Cascadilla Creek Dredging - Preliminary Design Report T.G. Miller, P.C. 1 Section 1 – Project Introduction In response to notable sediment deposition that impairs boat navigation and fosters winter ice jams, the City of Ithaca is pursuing the mechanical dredging of Cascadilla Creek between the confluence with Cayuga Inlet and the pedestrian bridge adjacent to New York State Route 13 (N. Meadow Street). The length of the creek corridor to be impacted is approximately 1,700 feet and upwards of 12,000 cubic yards of sediment may be dredged to restore navigation and minimize winter ice jam formations. According to the New York State Canal Corporation, Western Division the proposed limits of the dredging activity do not involve waterways customarily the responsibility of the Barge Canal system. Further, Cascadilla Creek is not included within the dredging limits of the pending Ithaca Flood Control Dredging Project sponsored by the New York State Department of Environmental Conservation. Therefore, this stand alone dredging project is being undertaken directly by the City of Ithaca with financial assistance provided by the Dormitory Authority of the State of New York. As the Project Sponsor, the City has authorized the preparation of this Design Report and will be responsible for evaluating environmental impacts, in accordance with SEQRA, as well as obtain all environmental permits applicable to the in-water dredging activities and the final disposition of the removed sediment. Section 2 – Dredging Plan The extents of the dredging work are illustrated on drawings C100-C201 attached to this Report. Bathymetric survey data collected by the USGS in July 2016 was supplemented with a field survey performed by this firm in February 2017 to produce a representative map of existing hydrographic conditions. In general, the depth of sediment to be removed averages 3.6 feet. The width of the dredged area varies between 80 and 160 feet. It is anticipated the mechanical operation will utilize barges to float the excavators and haul sediment to the shore line. A long-reach, track-mounted excavator may also be utilized for sediment removal between boat slips and docks along the north bank. Temporary dewatering facilities are being considered on two sites immediately adjacent to this segment of creek. Along the north bank, lands now or formerly owned by Pier Road Properties, LLC (aka Johnson’s Boat Yard) could be available for short-term use by the City. The current land owner and City are developing a Letter of Intent relative to the use of this land by temporary easement. Alternatively, land immediately adjacent to the south bank and controlled by the Ithaca Area Waste Water Treatment Facility (IAWWTF), of which the City is an owner in common with the Town of Dryden and Town of Ithaca, could be used. The IAWWTF land is currently unimproved but was T.G. Miller, P.C. 2 historically used as a manufactured gas plant. The land is also crisscrossed with multiple below-grade utilities serving the treatment facility. Use of both sites for temporary dewatering will be pursued simultaneously. The City will petition the New York State Department of Environmental Conservation (NYSDEC) for a case- specific beneficial use determination (BUD) for the Navigational Dredged Material (NDM). It is the expectation that dewatered sediment would be disposed at upland sites as imported fill and meeting ‘Residential Use’ constituent levels. There are several local mine operators who have expressed interest in using the fill for mined land reclamation. Section 3 – Sampling Plan The Sediment Sampling Plan approved by NYSDEC for this project was prepared to be consistent with the NYSDEC Division of Water protocols contained in Technical & Operational Guidance Series (TOGS) 5.1.9. The proposed sampling locations will be spaced at 150 - 300 foot intervals along the 1,700-foot section of the Creek as depicted on Drawing C102, Dredging and Sediment Sampling Plan. The City will retain a Geotechnical Consultant to collect sediment core samples. Each core will be broken into two segments, one segment being homogenized over the proposed depth of dredging and the second segment representing the top six inches of the sediment that will be newly exposed by the dredging. Accordingly, the segments of each proposed core sample location based on the proposed dredging plan should approximate the following: Sediment Core # 1 2 3 4 5 6 7 Station 3+00 4+50 6+46 9+61 11+50 14+66 17+47 Segment 1 (ft) 0-3.9 0-3.2 0-2.9 0-1.3 0-3.5 0-1.7 0-1.5 Segment 2 (ft) 3.9-4.9 3.2-4.2 2.9-3.9 1.3-2.3 3.5-4.5 1.7-2.7 1.5-2.5 Section 4 - Sediment Laboratory Analysis and Characterization A New York State Department of Health (NYSDOH ELAP: Environmental Laboratory Approval Program) approved laboratory will be retained by the Geotechnical Consultant for physical and chemical analysis of the collected sediment core samples. Each homogenized core sample segment representing the dredged material (Segment 1) will be analyzed for physical parameters including grain size, Total Organic Carbon (TOC), water content, specific gravity and Atterberg limits. Segment 2 samples will not be analyzed initially, but will be archived and only analyzed if there are Class C contaminant levels detected in the overlying Segment 1 sediment. The selection of constituents for Segment 1 analysis and detection methods will be consistent with the following parameters: Parameter Suggested Analytical Methods* Metals/Inorganics: Metals EPA 6010B and 7470A Cyanide EPA 9013 PAHs and Petroleum-Related Compounds: Volatile Organic Compounds EPA 8260B Semi-Volatile Organic Compounds EPA 8270 Pesticides: T.G. Miller, P.C. 3 Pesticides EPA 8081A Chlorinated Hydrocarbons: PCBs EPA 8082 Dioxin+ EPA 1613B Physical Properties: Particle Size Analysis ASTM D 422 Total Organic Carbon EPA 9060A *If more than one analytical method is available for a given parameter, the method with the lowest practical quantification limit (PQL) will be chosen. +Only the Segment 1 sample with the highest silt/clay content will initially be analyzed. Archive remaining samples and analyze only if dioxin concentrations in the Segment 1 sample contain high dioxin concentrations. For the purpose of a Beneficial Use Determination, sediment characterization data will also be compared with Allowable Constituent Levels for Imported Fill or Soil for ‘Residential Use’ as presented in Appendix 5 of the Department’s “DER-10 Technical Guidance for Site Investigation and Remediation” dated May 2010 (DER-10). Section 5 - Hydrilla Hydrilla verticillata is an aggressively invasive aquatic weed with multiple modes of reproduction that spreads readily to create green mats across wide expanses of open water. Hydrilla was first observed in mid-August 2011 infesting 166 acres within the Cayuga Inlet and notably this segment of Cascadilla Creek west of Route 13. It was later found that approximately 9 miles of Inlet shoreline were colonized and in areas with water depth of up to eight feet. Once discovered, the Hydrilla Task Force of the Cayuga Lake Watershed was organized to develop the Cayuga Inlet Hydrilla Management Plan and lead efforts to eradicate the infestation. The primary control strategy initially implemented in 2012, and being continued today, are herbicide treatments of endothall and fluridone. Cayuga Inlet treatments are reported to have decreased tuber populations from an average of 304 tubers per square meter in 2011 down to 5 tubers per square meter in 2014. Based on plant monitoring results as of October 2017, no hydrilla was found in the Cayuga Inlet. It is anticipated that the treatments will eventually eradicate the Hydrilla completely; however, dredging will need to consider the impact of the Hydrilla on the dredging operations and management of the dewatered sediment material. Section 6 - Long-Term Sediment Management The coarse sands and gravels transported through the channelized reach of Cascadilla Creek are most notably deposited immediately below the pedestrian bridge where the creek cross section becomes significantly wider and stream flow velocities inherently decrease. The dredging operation will initially remove a large volume of the sediments from this location. To minimize the future deposition of these coarse aggregates in the dredged channel, the City is proposing the installation of a sediment trap within the channelized segment of the creek that can be accessed by City forces on a permitted basis to remove T.G. Miller, P.C. 4 captured sediments. Candidate locations for a sediment trap, depicted in Figure 1 include the Adams Street pedestrian bridge, the Madison Street bridge and the intersection of Willow Avenue and Marshall Street. The City streets paralleling Cascadilla Creek (Lake Avenue and Willow Avenue) afford reasonable access to the creek with conventional excavation equipment. The minimum design parameters for a sediment trap are expected to include: x Avoid creating aquatic barriers to the passage of aquatic organisms. x Maintain the present creek topology above and below the structure to negate ‘head cutting’ or undermining of the existing channel walls and bridge abutments. x Maintain the hydraulic capacity of the channel to be consistent with flood flows and water surface profiles previously derived in the 1981 FEMA Flood Insurance Study. From the environmental impact mitigation and constructability perspectives, site selection may be most influenced by the relationship between the creek invert and the Cayuga Inlet/Cayuga Lake mean water surface elevation. Based on the 1981 FEMA Flood Insurance Study, the invert of Cascadilla Creek at the Madison Street bridge and Willow Avenue/Marshall Street sites is 384.5 feet and 386 feet, respectively; both of which are above the mean level of Cayuga Lake (382.6 feet NGVD 1929). The Adams Street bridge site, with a creek invert of approximately 381.5 feet, will be influenced by the level of Cayuga Lake for the majority of the year. Pending a permit determination of frequency and timing for creek disturbance activity, the site least likely to be inundated by normal Cayuga Lake levels will realize fewer environmental impacts attributable to water management and turbidity control. Conceptual designs being considered for cost estimating and permitting purposes include pre-cast concrete panels and conventional steel sheeting with natural rock bottom. The floodway width at each location is roughly 30 feet. Based on a target capture volume of 100 cubic yards, the length of the trap at a depth of 4 feet will be approximately 25-30 feet. To maintain grade of the creek invert, both the upstream and downstream edges of the trap will incorporate a stable weir that can be sloped to encourage a low-flow channel. Section 7 - Permitting The following permits are expected to be required for completion of this project: Permit Agency Activity Section 10 of the Rivers & Harbors Act of Federal: U.S. Army Corps of Engineers (USACE) Work within navigable waters of the US Section 404 of the Clean Water Act Federal: USACE Work within waters of the US Section 401 of the Clean Water Act State: NYSDEC NY State water quality standards for discharges to waters of the US Article 15 of the ECL, Protection of Waters State: NYSDEC Work within State protected water bodies SPDES General Permit (GP-0-15- 002) State: NYSDEC Storm water discharges from construction activities T.G. Miller, P.C. 5 Section 8 - Project Cost Estimate The total project cost, inclusive of design and construction contingencies is estimated to be $2,000,000 and is itemized as follows: Design and Permitting: Amount Comment x Survey, Engineering and Permits $85,000. Incl. construction admin services x Sediment Sampling and Testing $35,000. Pre- and post-dredging samples Dredging Operations: x Mobilization $75,000. x Turbidity and Sediment Control $125,000. x Mechanical removal of 12,000+/- cubic yards $1,200,000. Long-stick excavator and clam shell Sediment Disposal: x Haul to Upland Disposal Site $315,000. Assumes ‘Residential Use’ fill x Dewatering Site Restoration $20,000. Sediment Trap: x Steel sheeting $120,000 Assume 20 feet total x Bypass Pumping $5,000 x Excavation and Extra Heavy Stone Fill bottom $20,000 Approximate area of 750 sf Total Estimated Project Cost = $2,000,000. D D D D D D DD