Addington Crossing Subdivision - SSW-SWU-101-Application

Form SWU-101 Version Oct. 31, 2013 Page 3 of 6
IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.

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 Catawba River basin.
4. Total Property Area: 103.66 acres 5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: acres
7. Total Property Area (4) – Total Coastal Wetlands Area (5) – Total Surface Water Area (6) = Total Project
Area+: 103.66 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
(MHW) 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 MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 11 %
9. How many drainage areas does the project have? (For high density, count 1 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 Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4
Receiving Stream Name Price Mill Creek Price Mill Creek Price Mill Creek Price Mill Creek
Stream Class * C C C C
Stream Index Number * 11-138-2-2 11-138-2-2 11-138-2-2 11-138-2-2
Total Drainage Area (sf) 176,424 495,548 228,009 612,612
On-site Drainage Area (sf) 176,424 495,548 228,009 612,612
Off-site Drainage Area (sf)
Proposed Impervious Area** (sf) 35,995 101,090 46,470 124,900
% Impervious Area** (total) 20% 20% 20% 20%

Impervious** Surface Area Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4
On-site Buildings/Lots (sf) 18,100 52,657 24,185 64,827
On-site Streets (sf) 13,225 35,792 16,469 44,394
On-site Parking (sf)
On-site Sidewalks (sf) 4,670 12,641 5,816 15,679
Other on-site (sf)
Future (sf)
Off-site (sf)
Existing BUA*** (sf) 0 0 0 0
Total (sf): 35,995 101,090 46,470 124,900
* Stream Class and Index Number can be determined at: http://portal.ncdenr.org/web/wq/ps/csu/classifications
** Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc.