SW4240903_Stormwater Narrative_20241114

240521.000 Villas at Hickory Tree SCM I NCDEQ
3305 Hickory Tree Rd, Winston-Salem,NC 27127
Existing Conditions
The project site is located at 3305 Hickory Tree Rd, Winston-Salem, NC 27127. The purpose of
the project is to convert the 2013 Dry Pond into a Wet Pond to meet NCDEQ's requirements for
stormwater control.
Wet Pond Routing
The wet pond is designed to store and detend the 1, 2, and 10 year storms while being able to store
the 25, 50, and 100 year storms.
The 1, 2, 10, 25, 50, and 100 year routing from the wet pond is respectively, 7.04 cfs, 10.32 cfs,
16.19 cfs, 16.95 cfs, 17.48 cfs, and 17.96 cfs.
The 1, 2, 10, 25, 50, and 100 year staging from the wet pond is respectively, 815.25 ft, 815.33 ft,
815.56 ft, 815.79 ft, 816.01 ft, and 816.24 ft.
The bottom of pond is 811.00, the bottom of littoral shelf is 814.00, top of littoral shelf is 815.00,
and top of pond at 817.50,providing a freeboard of 1.26'.
The wet pond's outlet structure is a 4'x4' structure with a 18" RCP outlet pipe and a 4" orifice at
elev. 814.00.
Special Design Criteria
- The final surface used is a combination of 2013 Existing conditions survey, 2013 proposed
grading, and 2016 Dry Pond as-built survey.
- 2013 Pre-Drainage conditions are used; 2013 Pre & Post Drainage plans sealed by David
F. Reese has been provided for reference.
- 2013 Post-DA conditions are still accurate with 2024 field visit.
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