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HomeMy WebLinkAboutRequest for Proposals Six Mile Tributary Town of Ithaca || 215 N Tioga Street || Ithaca, NY 14850 REQUEST FOR PROPOSALS Ithaca Reservoir Stream Restoration and Sediment Reduction Project: Engineering Planning & Design Tompkins County, New York August 15, 2022 2 | Page EXECUTIVE SUMMARY The Town of Ithaca, with support from Cayuga Watershed Intermunicipal Organization, Tompkins County Soil & Water Conservation District and Six Mile Creek Vineyards, seeks to address streambank erosion and sediment loading along an un-named tributary to the City of Ithaca Reservoir. The Town seeks professional engineering services for the purposes of planning and design. Funding for this project is capped at $30,000 and work must be completed prior to 01 May 2023. TABLE OF CONTENTS EXECUTIVE SUMMARY .................................................................................................................................. 2 TABLE OF CONTENTS ..................................................................................................................................... 2 INTRODUCTION ............................................................................................................................................. 3 PROJECT BACKGROUND ................................................................................................................................ 3 PROJECT DESCRIPTION .................................................................................................................................. 4 PROJECT SCOPE ............................................................................................................................................. 5 PROJECT FUNDING ........................................................................................................................................ 6 PROJECT TIMELINE ........................................................................................................................................ 6 POINT OF CONTACT ...................................................................................................................................... 6 PROCUREMENT OVERVIEW .......................................................................................................................... 7 RFP DOCUMENTS .......................................................................................................................................... 7 OFFEROR’S PRE-SUBMITTAL RESPONSIBILITIES AND REPRESENTATIONS .................................................... 7 TECHNICAL PROPOSAL EVALUATION ............................................................................................................ 8 TECHNICAL PROPOSAL CONTENT ................................................................................................................. 9 PRICE PROPOSAL ......................................................................................................................................... 10 DUE DATE/TIME, LOCATION, FORMAT ....................................................................................................... 10 QUESTIONS AND CLARIFICATIONS .............................................................................................................. 11 NEGOTIATIONS AND AWARD OF CONTRACT.............................................................................................. 11 TERMS AND CONDITIONS ........................................................................................................................... 12 APPENDIX A: DISCHARGE DATA .................................................................................................................. 13 APPENDIX B: RAINFALL DATA ..................................................................................................................... 15 APPENDIX C: GEOMORPHOLOGICAL DATA ................................................................................................. 17 APPENDIX D: LAND COVER DATA ................................................................................................................ 18 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 3 | Page INTRODUCTION The Town of Ithaca (Town) hereby requests Design Proposals (Proposals) from qualified offerors (Offerors) for the Ithaca Reservoir Stream Restoration and Sediment Reduction project located in Ithaca, NY. This Request for Proposals (RFP) is open to all Offerors self-identified as professionally qualified to and capable of providing the engineering services described herein. The purpose of this RFP is to determine who will be awarded an engineering design contract for the proposed work. The project priorities are: • Design Concept – The Town wishes to retain an engineering firm to develop a proposed design concept that is appropriate for achieving the stated goals • Project Readiness – The work should provide sufficient detail on design, placement and sizing of system elements to support project progression towards implementation • Water Quality Benefits – This project seeks to maximize the reduction of sediment loading to the City of Ithaca reservoir with additional downstream flooding reduction benefits anticipated as part of this effort PROJECT BACKGROUND Figure 1. Project area map. Note: watershed is approximate due to significant landscape alteration. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 4 | Page The project is located in Tompkins County, New York within the Six Mile Creek watershed (HUC12# 041402011010). A sixty foot reservoir along Six Mile Creek serves as the primary source of drinking water for approximately 30,000 people in and around the City of Ithaca. A small unnamed tributary (Stream) flowing directly into the reservoir and in close proximity to the drinking water intake is experiencing significant degradation that threatens the safety and function of the water supply (terminus: 42.416810, -76.460256; headwaters: 42.419836, -76.449616). The Stream flows in a roughly southwesterly direction. Both its course and drainage basin have been significantly altered. The basin can be broken down into five areas along its course: headwaters, upper reach, mid reach, vineyard reach and lower reach. The headwaters area lies within Eastern Heights Park, a small public recreational area serving nearby residents. Drainage consists of channelized ditches draining residences proximate to the park. These ditches converge at the southwestern corner of the park to form the Stream. The Stream then passes through a heavily forest area and flows in a linear fashion perpendicular to the contour (upper reach). At the lower edge of this forested area lies a road embankment that diverts the Stream 90° along the contour to the NW into an inlet box which ties into a stormwater drainage system serving homes along Park Lane (mid reach). Water is then conveyed, along with road drainage, under Slaterville Road where it emerges from a culvert at Six Mile Creek Vineyard. The Stream then flows through vineyard property (vineyard reach) after which it is conveyed through the forested buffer area surrounding the reservoir prior to reaching its terminus (lower reach). At present, heavy rain events cause overtopping of the road embankment located at upper reach-mid reach interface. The Town of Ithaca must regularly remove accumulated sediment from the area to reduce overtopping and maintain drainage via the inlet box. Significant stream erosion is occurring along the upper reach and is assumed to be the principal source of this sediment. An in-stream forebay and additional in-stream control structures were placed along the stream where it re-emerges at Six Mile Creek Vineyard. Benefits derived from these features appear to be minimal at this stage as the stream continues to incise. Six Mile Creek Vineyard has lost property and infrastructure as a result. PROJECT DESCRIPTION This projects concerns the stabilization of the Stream in order to reduce bank loss and sediment loading. The means by which this is to be achieved has not been finalized, and Offerors may propose any approach that complies with the project goals and design constraints. Those constraints are as follows: 1) limit long term maintenance and operational costs for the Town; 2) limit projected material and supply costs associated with construction to less than $250,000; 3) no loss of cultivated land for Six Mile Creek Vineyards; 4) employ “green engineering” techniques and limit use of traditional hardened features that typically amplify rather than reduce peak flow downstream; and 5) account for projected future Figure 2. Upper reach stream segment. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 5 | Page precipitation conditions (i.e. higher total volume, greater intensity) to ensure long-term viability of improvements. The following preliminary design approach is provided solely as an example: • Headwaters Area: Establish a sediment control basin, constructed wetland, or similar such storage device at the southwestern corner of Eastern Heights Park to reduce peak flows and subsequent erosion along Upper Reach segment. • Upper Reach: Preserve as is under the assumption that benefits provided by the upstream storage basin coupled with those of the existing forested riparian corridor are sufficient and, as such, disturbance of the existing riparian corridor is not advised. • Mid Reach: Re-align the Stream as it emerges out of the forested Upper Reach to reduce the impact to the access road. • Vineyard Reach: Re-establish the floodplain and employ a step-pool restoration design. Reduce slope and increase stream reach through the area by minor realignment of the Stream to the southeast towards the pond area. • Lower Reach: No changes recommended. Cayuga Watershed Intermunicpal Organizational staff collected hydrological and geomorphological data in 2021 and 2022 to be used for informing design decisions. Data is provided in the attached appendices with higher frequency discharge data available. Alterations to the landscape have been significant enough that attempts to generate a drainage basin via spatial analysis software using existing DEMs are believed to be slightly inaccurate, although the stream channel itself has been ground truthed. Shapefiles of both are available. PROJECT SCOPE The work will entail justifying and developing a design for achieving the stated water quality improvement goals. A satisfactory detailed engineering design report must provide sufficient information to move into full plans, permitting, and ultimately construction. While the delivery of stamped plans is highly desirable, the Town recognizes that this is likely beyond the scope of this project given availability of funds; though Offeror should indicate as such within their Proposal. The consultant shall: 1) Become familiar with the project site and all available water quality data 2) Justify a conceptual design to address the streambank erosion and sediment reduction goals of the project 3) Upon approval of an initial conceptual design, develop a draft engineering design report for review and comment by the Town and its partners. 4) Incorporate and/or address feedback and deliver a final engineering design report. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 6 | Page PROJECT FUNDING Funding for this Project is provided through a grant awarded by the New York State Department of Environmental Conservation with additional financial and technical support from partners. Maximum compensation for the requested work is capped at $30,000. PROJECT TIMELINE The final engineering design report is to be completed by April of 2023. The Town and its partners anticipate conducting the procurement of the design services in accordance with the following list of milestones (Table 1) leading to award of the Design Contract. This schedule is subject to revision and the Town reserves the right to modify this schedule if deemed necessary. Table 1. Proposed design phase timeline. TASK DATE Advertise RFP 08/15/22 Pre-proposal meeting and site tour 08/24/22 10:00 RFP questions due to POC 09/09/22 16:00 RFP responses to question 09/14/22 Proposal submission due 09/30/22 16:00 Design Contract Execution 10/12/22 Kickoff Meeting 10/17/22 Draft design report and meeting 03/01/23 Final engineering design report 04/14/23 POINT OF CONTACT The sole point of contact (POC) for matters related to the RFP shall be Ian Smith and is the only individual authorized to discuss this RFP with any interested parties. All communications with POC about the Project or this RFP shall be in writing (electronic or physical), as required by this RFP. POC Information: Name: Ian Smith Phone: 315-781-4559 Email: ismith@hws.edu Mailing Address: Hobart and William Smith Colleges Attn: Ian Smith, FLI 300 Pulteney Street Geneva, NY 14456 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 7 | Page Physical Address: Finger Lakes Institute 601 South Main Street Geneva, NY 14456 PROCUREMENT OVERVIEW The Town will select an Offeror in accordance with its Procurement Policy. Determination of “best value” will be through the evaluation and rank of Offerors’ Proposals by the partnership group based on the criteria established in this RFP. An Offeror’s Proposal must meet all requirements established by this RFP. Requirements of the RFP generally use the words “shall”, “will”, or “must” (or equivalent terms) to identify a required item to be submitted with an Offeror’s Proposal. Failure to meet RFP requirements may render an Offeror’s Proposal non-responsive. The extent to which an Offeror’s Proposal meets or exceeds evaluation criteria will be evaluated by group and reflected in the group’s scoring (in their sole discretion) of the Offeror’s Proposal. Upon completion of the evaluation and scoring of Proposals, the highest scored Offeror whose Proposal is responsive, and whose price is within budget for services will be recommended for an award of a lump sum Contract. RFP DOCUMENTS Each Offeror shall review the RFP documents and provide questions for clarification, including but not limited to terms that it considers to be ambiguous or to which it takes exception. Such questions or requests for clarification will be submitted to the POC. The partnership group will review all questions and/or requests for clarification received and, if it deems appropriate, may modify the RFP documents through an addendum. Offerors shall base their Proposals on the terms and conditions of the RFP documents included in the latest issued addendum. Offeror’s POC shall be notified via email and provided an electronic copy of any addenda to the RFP documents. Hard copies of the addenda will be available upon request. If there is any conflict between the electronic format and hard copy of any RFP documents or addenda, the hard copy on file shall control. OFFEROR’S PRE-SUBMITTAL RESPONSIBILITIES AND REPRESENTATIONS Each Offeror shall be solely responsible for examining the RFP documents, including any addenda issued to such documents, and any and all conditions which may in any way affect its proposal or the performance of the work on the project, including but not limited to: 1. Examining and carefully studying the RFP documents, including any addenda and other information or data identified in the RFP documents; Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 8 | Page 2. Attending, if possible, the pre-proposal meeting located at the project site (10AM @Six Mile Creek Vineyard, 1551 Slaterville Road, Ithaca NY 14850) in order to become familiar with the general, local and site conditions that may affect the cost, progress or performance of its work on the project. If not attending, Offeror MUST demonstrate familiarity with both the pre- existing conditions and the constraints presented by the project location; 3. Determining that the RFP documents are sufficient to indicate and convey understanding of all terms and conditions for the performance of Offeror’s work on the project; and 4. Notifying POC in writing of all conflicts, errors, ambiguities, or discrepancies that the Offeror discovers in the RFP documents. 5. Any failure to fulfill these responsibilities is at the Offeror’s sole risk, and no relief will be provided by the Town or any of the project partners. TECHNICAL PROPOSAL EVALUATION The Town and its partners will evaluate each Proposal from each Offeror. In its sole discretion, the Town may hold interviews, ask written question of the Offerors, seek written clarification and conduct discussions on the Proposals. The Town reserves the right to conduct an independent investigation of any information, including prior experience, identified in a Proposal by accessing public information, contacting independent parties, or by any other means. Upon completion of the evaluation of the proposals, the Offeror whose proposal is responsive, best meets the needs of the project, and whose price is within budget, will be recommended for an award of the lump sum Contract. If the Town determines that a Proposal does not comply with or satisfy requirements of the RFP documents, the Town may find such a Proposal to be non-responsive. The Town and its partners will identify the firms most highly qualified to perform the work according to the following criteria: 1. Capability and Experience: The extent to which the Offeror’s staff and prior experience demonstrates an ability to successfully complete the work. (10 Pts) 2. Review of Data: The extent to which review and analysis of collected is complete and incorporated into the design concept. (10 Pts) 3. Engineering Design: The extent to which the preliminary conceptual design and workplan meets or exceeds the Project intended scope of work to accomplish the Project’s goals. (30 Pts) 4. Proposed Schedule: The extent to which the proposed schedule of work is complete and feasible. (10 Pts) The score of each Proposal evaluation criterion will be ranked on a scale of 1-10 as listed below (Engineering Design component is rated more heavily at 1-10 x 3 for a maximum of 30). The maximum number of points is 60. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 9 | Page Excellent (9-10): The Offeror has significantly exceeded the stated criteria in a way that is beneficial to the partnership group. This rating indicates a consistently outstanding level of quality for the stated criteria, with little or no risk that the Offeror would fail to meet the requirements of the solicitation. Good (6-8): The Offeror has exceed the stated criteria. This rating indicates a generally better- than-acceptable quality for the stated criteria, with little or no risk that the Offeror would fail to meet the requirements of the solicitation. Fair (3-5): The Offeror has meet the stated criteria. This rating indicates a minimally acceptable level of quality for the stated criteria, and the Offeror demonstrates a reasonable probability of success. Poor (1-2): The Offeror has failed to meet the stated criteria and/or lacks essential information and is conflicting and/or unproductive. This rating demonstrates significant weakness and/or unacceptable quality. There is no reasonable likelihood of success. TECHNICAL PROPOSAL CONTENT The Proposal will consist of all information required and will be submitted in a sealed package by 09/30/22, 4PM (EST). The following components must be included in the Proposal: 1. Letter of Submittal Shall be on the Offeror’s letterhead and identify the full legal name and address of the Offeror. The Offeror is defined as the legal entity who will execute the Contract. The Letter of Submittal shall be signed by an authorized representative of the Offeror’s organization. All signatures shall be original and signed in ink. Declare that the offer represented by the Proposal will remain in full force and effect for one hundred twenty days after the date the Proposal is actually submitted. Identify the name, title, address, phone and email address of an individual who will serve as the Point of Contact for the Offeror. 2. Offeror’s Qualifications Offeror shall provide information regarding organizational structure, lead designer, and any personnel or other individuals that demonstrates the Offeror’s ability to successfully complete the work. Examples of previously completed work of similar scope and design are encouraged. 3. Acknowledgment of Receipt of RFP, Revisions and/or Addenda Provide the Acknowledgement of Receipt of addenda (attached to this RFP), signed by the Offeror’s Point of Contact or Principle Officer, with submission of the Proposal, which will serve as acknowledgement that Offeror has received this RFP. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 10 | Page 4. Review of Data Provide sufficient analysis of data from the project site to enable the Town and partners to understand and evaluate the Offeror’s understanding of the associated water quality benefits and limitations of the proposed work. Inclusion of projections of quantitative reductions in peak flow and/or sediment loading as informed through the use of various modeling tools such as STEP-L will receive full scores. 5. Engineering Design Offeror should provide a description of the preliminary conceptual design intended to meet or exceed the Project’s scope of work. Offeror shall provide sufficient information to enable reviewers to understand and evaluate the Offeror’s proposed approach to achieving the project goals and deliver an engineering design report that supports future progression towards implementation. If Offeror is willing and able to provide a set of stamped drawings they should indicate as such. 6. Proposal Schedule Offeror shall provide a schedule for the entire Project outlining the Offeror’s proposed plan to accomplish the work. It should include the Offeror’s proposed sequence of work, duration for each task, and deliverables required to complete the Project. PRICE PROPOSAL A Price Proposal should be submitted along with the Technical Proposal. The Offeror shall specify a Cost Breakdown Summary in whole numbers and the Proposal Price, in both numbers and words. The Proposal Price shall be based upon the Proposal Schedule submitted. Offerors are advised that the prices set forth above shall be considered full compensation to Offeror for all design work associated with this Project, to include: labor, material, equipment, permits, taxes, overhead, profit and any other expenses of any kind applicable to the work to be undertaken by Offeror associated with such work, including but not limited to any escalation or acceleration of schedule. DUE DATE/TIME, LOCATION, FORMAT Proposals must be received by September 30, 2022 at 4PM (EST). All submissions, including hand- delivered packages, US Post Service regular or express mail, or private delivery service (FEDEX, UPS, etc.) must be delivered to one of the following addresses: Hobart and William Smith Colleges Finger Lakes Institute Attn: Ian Smith, FLI Attn: Ian Smith 300 Pulteney Street 601 S. Main Street Geneva, NY 14456 Geneva, NY 14456 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 11 | Page Neither fax nor email submissions will be accepted. Offerors are responsible for ensuring delivery by the deadline above, and late submissions will be rejected without opening, considering or evaluation, and will be returned unopened to sender. The Town accepts no responsibility for misdirected or lost Proposals. Each Offeror need only submit one (1) copy of the Technical Proposal, which must bear original signatures on the Letter of Submittal and one (1) Price Proposal. QUESTIONS AND CLARIFICATIONS All questions and requests for clarifications regarding the RFP shall be submitted to POC in writing (submission via email is acceptable). No requests for additional information, clarification, or any other information should be directed to any other individual. On oral requests for information will be accepted. Responses to questions or requests for clarification shall be in writing, and may be accomplished by an addendum to this RFP. The Town and its partners will not be bound by any oral communications, or written interpretations of clarifications that are not set forth in an addendum. The Town, in its sole discretion, shall have the right to seek clarification from any Offeror to fully understand information contained in the Proposal and to help evaluate and rank Offerors. To ensure that all Offerors have equal information, written copies of all queries and answers will be compiled and issued to all registered recipients of the RFP. These queries and answers are considered a part of the RFP and may revise or correct the original. After the close of the query period, queries concerning the project or the RFP cannot be answered except by quoting the RFP, as amended. The Town reserves the right and fully intends to make investigations of the proposals, qualifications and experience of the Offerors as it deems appropriate. NEGOTIATIONS AND AWARD OF CONTRACT The Town and its partners will review the Proposal submitted by the highest-scored Offeror. If the Proposal is responsive and the price proposal is within budget for services, then The Town will issue a Notice of Intent to Award the Successful Offeror. The Town may conduct limited negotiations with the Successful Offeror to clarify any remaining issues regarding scope, schedule, financing, or any other information provided by the Successful Offeror. If the price proposal submitted by the highest-scored Offeror is not within budget, the price may be negotiated to provide fair and reasonable compensation and maximize Contract value with price and other factors considered. In the event an acceptable price cannot be negotiated, The Town will begin negotiations with the next highest-scored Offeror. The final award will be made to the qualified, responsive Offeror whose Proposal is most advantageous with price, prior experience and other factors considered. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 12 | Page TERMS AND CONDITIONS All proposals shall be confidential until the Town has fully executed a contract with the selected consultant. The Town, its partners, and Offerors shall make no additional distribution of the proposal prior to execution of the contract. Upon execution of the contract, all information disclosed by Offerors pursuant to this RFP shall be open to public inspection. The Town and its partners shall not be liable for any costs incurred by Offerors in responding to this RFP, or in the provision of information pursuant to this RFP, including interviews, negotiations, and other information deemed useful or necessary in awarding and executing a contract. The Town and its partners shall not accept or reimburse any cost or charge incurred prior to execution of a contract and such cost shall not be included in any part of the proposal. Ownership of all data, material and documentation originating and prepared for the Town and its partners, pursuant to this RFP, shall belong exclusively to the Town and its partners. The Town and its partners reserve the right to utilize any or all information, plans, and materials submitted in any manner, however, such utilization shall in no way create an obligation for payment by the Town or its partners to any Offeror. By submitting a proposal, the Offeror certifies that this RFP was fully read and understood. The filing of a proposal in response to this RFP shall constitute an agreement of the Offeror to the procedures, terms and conditions set forth herein, except where expressly noted otherwise. Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 13 | Page APPENDIX A: DISCHARGE DATA Date Average Daily Discharge (gallons / minute) 6/29/21 4424.03 6/30/21 129.84 7/1/21 143.96 7/2/21 75.37 7/3/21 134.17 7/4/21 50.62 7/5/21 28.06 7/6/21 108.08 7/7/21 100.31 7/8/21 116.88 7/9/21 4406.98 7/10/21 118.47 7/11/21 2227.91 7/12/21 796.52 7/13/21 149.33 7/14/21 932.35 7/15/21 157.81 7/16/21 85.60 7/17/21 7348.12 7/18/21 383.97 7/19/21 116.46 7/20/21 482.54 7/21/21 208.37 7/22/21 66.17 7/23/21 51.39 7/24/21 43.61 7/25/21 43.81 7/26/21 38.24 7/27/21 36.51 7/28/21 29.66 7/29/21 23.93 7/30/21 19.92 7/31/21 11.44 8/1/21 270.45 8/2/21 77.58 8/3/21 28.28 8/4/21 21.64 8/5/21 18.73 8/6/21 11.81 8/7/21 7.81 8/8/21 3.51 8/9/21 2.32 8/10/21 1.94 8/11/21 1.48 8/12/21 1.06 8/13/21 0.63 8/14/21 0.42 8/15/21 0.01 8/17/21 7242.52 8/18/21 9823.18 8/19/21 9407.41 8/20/21 158.29 8/21/21 72.09 8/22/21 42.19 8/23/21 29.08 8/24/21 21.01 8/25/21 16.51 8/26/21 12.37 8/27/21 11.87 8/28/21 10.01 8/29/21 8.41 8/30/21 7.81 8/31/21 5.44 9/1/21 13.35 9/2/21 10.50 9/3/21 6.62 9/4/21 4.22 9/5/21 11.20 9/6/21 12.45 9/7/21 7.47 9/8/21 152.95 9/9/21 14.84 9/10/21 7.52 9/11/21 3.40 9/12/21 2.05 9/13/21 11.92 9/14/21 189.00 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 14 | Page 9/15/21 440.76 9/16/21 45.54 9/17/21 22.07 9/18/21 18.99 9/19/21 16.08 9/20/21 12.35 9/21/21 10.51 9/22/21 11.47 9/23/21 4478.21 9/24/21 60.23 9/25/21 29.11 9/26/21 36.40 9/27/21 25.52 9/28/21 109.34 9/29/21 24.68 9/30/21 20.82 10/1/21 16.54 10/2/21 13.64 10/3/21 185.34 10/4/21 241.85 10/5/21 104.99 10/6/21 44.02 10/7/21 34.04 10/8/21 30.69 10/9/21 27.54 10/10/21 24.03 10/11/21 20.45 10/12/21 15.98 10/13/21 14.73 10/14/21 15.03 10/15/21 12.86 10/16/21 1339.59 10/17/21 72.97 10/18/21 37.85 10/19/21 26.30 10/20/21 21.62 10/21/21 176.36 10/22/21 294.74 10/23/21 31.25 10/24/21 27.07 10/25/21 116.55 10/26/21 16119.24 10/27/21 651.55 10/28/21 156.91 10/29/21 1650.82 10/30/21 1388.18 10/31/21 195.09 1-Nov 99.15 Hourly Q Summary Statistics Mean 603.334 Standard Error 92.779 Median 26.942 Mode 25.304 Standard Deviation 5054.521 Sample Variance 25548178.176 Kurtosis 232.883 Skewness 13.983 Range 121602.370 Minimum 0.009 Maximum 121602.378 Sum 1790694.974 Count 2968 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 15 | Page APPENDIX B: RAINFALL DATA Source: https://www.nrcc.cornell.edu/wxstation/ithaca/ithaca.html Date Daily Total (in) 30-Jun 0.81 1-Jul 0.55 2-Jul 0.3 3-Jul 0.03 4-Jul 0.22 5-Jul 0 6-Jul 0.01 7-Jul 0.43 8-Jul 0.72 9-Jul 0.79 10-Jul 0.11 11-Jul 0 12-Jul 1.08 13-Jul 0.01 14-Jul 0.5 15-Jul 0.52 16-Jul 0 17-Jul 0 18-Jul 0.57 19-Jul 0.01 20-Jul 0 21-Jul 0.23 22-Jul 0 23-Jul 0 24-Jul 0 25-Jul 0.03 26-Jul 0 27-Jul 0 28-Jul 0.14 29-Jul 0 30-Jul 0.07 31-Jul 0 1-Aug 0 2-Aug 1.26 3-Aug 0 4-Aug 0 5-Aug 0 6-Aug 0 7-Aug 0.01 8-Aug 0 9-Aug 0.35 10-Aug 0 11-Aug 0.02 12-Aug 0 13-Aug 0 14-Aug 0.1 15-Aug 0 16-Aug 0 17-Aug 0.2 18-Aug 1.87 19-Aug 2.03 20-Aug 0.25 21-Aug 0.05 22-Aug 0.06 23-Aug 0 24-Aug 0 25-Aug 0 26-Aug 0 27-Aug 0 28-Aug 0 29-Aug 0 30-Aug 0 31-Aug 0.04 1-Sep 0 2-Sep 0.35 3-Sep 0 4-Sep 0 5-Sep 0.05 6-Sep 0.39 7-Sep 0.06 8-Sep 0 9-Sep 0.91 10-Sep 0.02 11-Sep 0 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 16 | Page 12-Sep 0 13-Sep 0.35 14-Sep 0.34 15-Sep 0 16-Sep 0.78 17-Sep 0 18-Sep 0.15 19-Sep 0 20-Sep 0 21-Sep 0 22-Sep 0 23-Sep 0.03 24-Sep 1.49 25-Sep 0 26-Sep 0.11 27-Sep 0.06 28-Sep 0.06 29-Sep 0.08 30-Sep 0 1-Oct 0 2-Oct 0 3-Oct 0 4-Oct 0.86 5-Oct 0.45 6-Oct 0.02 7-Oct 0.01 8-Oct 0 9-Oct 0.01 10-Oct 0 11-Oct 0 12-Oct 0 13-Oct 0 14-Oct 0 15-Oct 0 16-Oct 0 17-Oct 0.97 18-Oct 0.09 19-Oct 0.08 20-Oct 0 21-Oct 0 22-Oct 0.56 23-Oct 0 24-Oct 0.04 25-Oct 0.31 26-Oct 0.79 27-Oct 2.21 28-Oct 0 29-Oct 0 30-Oct 0.82 31-Oct 0.13 Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 17 | Page APPENDIX C: GEOMORPHOLOGICAL DATA Date: 4/1/2022 Discharge: *Coordinates Approximate (+/- 1.5 feet) WGS84 TRANSECT A • Left wetted edge @ 44.4 Feet • Right wetted edge @ 61.5 Feet • 42.416920°, -76.454869° @ 0.0 Feet • 42.417024, -76.455090 @ 90.0 Feet TRANSECT B • Left wetted edge @ 58.2 Feet • Right wetted edge @ 52.5 Feet • 42.416317, -76.455423 @ 0.0 Feet • 42.416439, -76.455658 @78.0 Feet 0 2 4 6 8 10 12 0 10 20 30 40 50 60 70Elevation to Thalweg (dec.ft)Distance Left Bank to Right Bank (dec.ft) Transect A Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 18 | Page 0 2 4 6 8 10 12 0 10 20 30 40 50 60 70 80Elevation to Thalweg (dec.ft)Distance: Left Bank to Right Bank (dec.ft) Transect B Request for Proposals – Ithaca Reservoir Stream Restoration and Sediment Reduction Project 19 | Page APPENDIX D: LAND COVER DATA Cell Value Land Use Type Count % of WS 21 Developed, open space 53 14.10% 22 Developed, low intensity 26 6.91% 23 Developed, medium intensity 1 0.27% 41 Deciduous Forest 146 38.83% 42 Evergreen Forest 2 0.53% 43 Mixed Forest 73 19.41% 81 Hay-Pasture 74 19.68% 82 Cultivated crop 1 0.27% ACKNOWLEDGEMENT OF RECEIPT OF ADDENDA Town of Ithaca Ithaca Reservoir Stream Restoration and Sediment Reduction Project: Engineering Planning & Design The undersigned Offeror hereby acknowledges receipt of the following Addenda: Addendum Number Dated Acknowledge Receipt (initial) No Addenda were received Acknowledgement for: Name of Bidder By: Signature of Authorized Representative Name: Print or Type Title: Date: