HomeMy WebLinkAbout40x70 Summary (1) Engineer's Report — October 2025
Duthie Storage Expansion
Verizon Lane, Lansing, NY
Executive Summary
Land Use &Drainage
The owner of this project, John Duthie of United Storage, is proposing an expansion as
part of its existing storage complex located on Tax Parcel Lot 30.-1-16.32. The project
plans to construct a 40' x 70' (2,800-SF) building on a vacant '/4-ac lot just southwest of
18 Verizon Lane (Car Ease) and east of 10 Verizon Lane (St. John Design Group). The
new building will be a single cold storage building. There will be one overhead door and
a man door. The construction will be of similar style, type, and color as the existing
building located just to the northeast. The proposed site is comprised of a mixture of
wooded brush and open space.
Because the area of disturbance will be less than 1-AC (8,500-SF SF+/-, 0.19-AC),the
project does not meet the State or local definition that requires a Full or Basic
Stormwater Pollution Prevention Plan (SWPPP). However, temporary construction
controls for erosion& sediment management, such as silt fencing, would be used as is
required.
Drainage for much of the site,including the future gravel parking area and building
rooftop will flow to the west into an existing swale that runs southward into the rest of
the complex drainageway. The site is protected from upland off-site runoff from the east
by an existing drainage swale that intercepts flow and directs it to the south into the same
receiving system. A hydraulic model was run showing the potential runoff impacts from
this project which show marginal volume and rate increases for 1, 10, and 100 yr storms.
Stormwater Management Summary
Subcatchment Evaluation: There is one pre-developed (existing)watershed
subcatchment(ESC) for this site totaling 8,515-SF (0.196-AC). Generally, existing
topography moves in a northeast to southwest direction over relatively flat slopes of
1.0% or less. Flow sheet flows into an existing drainage swale just to the west where it
joins with flow from the rest of the storage complex to the southwest and eventually into
the Town's common drainage system along Perruville road and eventually into State
Highway 34.
The proposed development will disturb approximately 0.19-AC of land. Drainage areas
affected by construction are in a single subcatchment„PSC which matches the shape and
size of ESC. Gravel driveway and parking runoff as well as the building rooftop will be
directed into the western Swale.
Site Control Methods: Temporary erosion and sediment controls will be used during
construction. There are no planned permanent controls.
Site Soils: There is one site soil type in the hydrologic soil group C located throughout
the drainage area. Ovid (OaA) is a silt loam with moderately low to moderately high
drainage characteristics 0.06—0.20 in/hr.
Soils data was obtained from the USDA Soil Conservation Service web soil survey.
Site Topography: The site as a whole has an average slope of<1.0% primarily moving
downhill from northeast to southwest.
Site Watershed: Of the 0.196-acre watershed,the area of disturbance will be
approximately 0.19-acres. A single off site grassed channel runs along the site's eastern
border and directs runoff into the Perruville Road receiving system.
Rainfall: Rainfall data used in the modeling and analysis was taken from Technical
Paper No. 40,Rainfall Frequency Atlas of the U.S. Weather Bureau,published by the
U.S. Department of Agriculture. Rainfall data specific to Tompkins County under
consideration, for various 24-hour storm events tabled below:
RAINFALL DATA
STORM 24-HOUR RAINFALL
1-year 1.99inches
10-year 3.39 inches
100-year 5.82 inches
These values were used in modeling for the evaluation of existing and proposed
stormwater run-off conditions.
Modeling Results Tabled:
EXISTING
EXISTING FLOW CONDITIONS AT DESIGN POINT(DP)
STORM E VENT PEAK FLOW TOTAL VOLUME
CFS AF
]-year 0.080 0.004
10- ear 0.035 0.015
100- ear 0.960 0.043
PROPOSED
WITH GRASSED CHANNEL AND INFILTRATION BASIN IN-LINE
PROPOSED FLOW CONDITIONS AT DESIGN POINT DPI
STORMEVENT PEAKFLOW TOTAL VOLUME
CFS AF
1-year 0.034 0.015
10- ear 0.740 0.034
100- ear 1.430 0.070
The run-off rates show marginal increases for the 1 Oyr and 100yr storms as modeled.
Operation
This will be a 24 hour, 7 day a week operation.
Transportation
1. There will be no highway dedication associated with this project.
2. The gravel driveway and parking area will be conjoined with the asphalt entrance
leading to the original storage complex.
3. The project will include provisions for seven (7)parking stalls which include one
(1) for handicap accessible access, and six (6) standard stalls.
4. An existing entrance off of Pemaville Road bring traffic in along a paved
driveway (Verizon Lane) into the original storage complex. The new storage
building will be accessed by the same driveway. Fire truck turn around should be
able to be satisfied by pulling up alongside the proposed building entrance,then
continuing into the rest of the storage complex to the east and using the
turnaround designed for such purposes within.
5. Additional vehicle traffic into the combined complex(existing and new) will be
about 10 cars/day.
Public Services
1. Fire protection will be handled by the Town of Lansing.
Lighting
4
Lighting will be of the same type and positioning as that of the other storage buildings
owned by United Storage.
Utility Services
The site will be served by standard electrical utilities that will require only minor
extension from existing service lines feeding the storage complex to the east. No
additional utilities are anticipated. Electricity will feed low level lighting, mini splits for
heating and cooling, and standard power outlets.
Flood Hazard
This building will be well above the 1.00 year flood plain.
Agriculture
This property is not part of an Ag District. There should be no conflict of noise or odors.
Sewerage
This project will not require a sewer system. No waste facilities are planned.
Water System
This project will not require a water connection_ No potable water facilities are planned.
Timothy C. Buhl, PE