SW6200704_Application_20201125

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Stormwater runoff will be conveyed via pipe to one of two dry detention basins The property is located
within 5 miles of an airport. Dry basins are, used in lieu of. wet basins
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b. If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the Cape Fear River basin.
4. Total Property Area: 50.88 acres
5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area+:50.88 acres
+ Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHV0 line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or MH[M line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 21.92
9. How many drainage areas does the project have?2 (For high density, count I for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
bra ina e Area 1
Draina c Area 2
Drainage Area
Drainage, Area
Receiving Stream Name
Grays Creek
Grays Creek
Stream Class *
B
B
Stream Index Number *
18-35-(1)
18-35-(1)
Total Drainage Area (so
392,177
828,598
On -site Drainage Area (so
337,51.7
828,598
Off -site Drainage Area (so
54,660
Proposed Impervious Area** (sf)
161,093
324,891.
Impervious Area** total)
43.05
40.73
Impervious— Surface Area
On -site Buildings/Lots (so
Drainage Area 1
124,000
Drainage Area 2
240,000
Drai:na r�5 Area _
Draina e Area
On -site Streets (sf)
37,093
84,891
On -site Parking (sf)
On -site Sidewalks (so
Other on -site (sf)
Future (sf)
Off -site (sf)
Existing BUA*** (sf)
0
0
Total (so:
161,093
324,891
Stream Class and Index Number can be determined at: ht o „gggj,e"trgle;jar,2r uurebLa q1 s csuclassi "cations
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6