HomeMy WebLinkAbout20050045 Ver 1_Staff Report_20050107MEMORANDUM
TO: John Dorney Regional Contact:
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Alan Johnson
Rex C3leason
Facility Name Childress Klein Properties: Steele Creek Road County Mecklenburg
Project Number 05 0045
Recvd From APP
County2
Region Alooresville
Received Date 1/7/05 Recvd By Region
Project Type commercial
Certificates Stream
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req.
NV isolated FT ON F--f-11-137-10-1 c 30,834. 0.40 F-
F_ F-O Y _0N ?????F__ F__
Mitigation Wetland
MitigationType Type Acres Feet
Is Wetland Rating Sheet Attached? O Y 4N Did you request more info? O Y @N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N
Is Mitigation required? O Y @N Recommendation: @ Issue O Issue/Coed O Deny
Provided by Region: Latitude (ddmmss) 35 06 07 Longitude (ddmmss) 80 59 03
Comments:
Staff visited the site on January 10, 2005. The site is old agricultural fields, which are returning to
forested conditions. The road adjacent to the property is currently being expanded to 4 lanes and the
area in general is in a state of commercial development. The applicant requests approval to fill two
isolated wetlands on the site. The fill is to allow for the construction of a commercial shopping
center- The two wetlands are located in the interior of the development. Avoidance/minimization is
not an option,
r1___.--.--_.-r n__-..-I i--..--1 L.. RAP1!\
cc: Regional Office
Central Office Page Number 1
Wetlands Tracking Projects Owner Agent List
Totals 14ew Record Print
Facility Name Childress Klein Properties: Steele Creels Road I County Mecklenburg
Project Number 05 0045 County2
Inactive I Region Mooresville
Project Type plu j)ose of commercial I DCM Office
Location Walker Branch, NC 49 (York Rd) & NC 160 (Steele Creek ( COE Office Asheville
401s Last Total Total Total Mit Recvd Sent to Recvd Action 401 401 Totals Mit
Recvd From Date Region Region Date Last Action Acres Feet Acres Feet
API, 1/7/2005 1/18%2005 2/10/200; Issue Gencral 0.40 401 A6
?1 rl
T
Total for Project: 0.40
Inspections/ Violations
Inspection Date Inspector Compliant Letter Type Date Sent Reply Date Current St
O Y O Inspect.
? I I
i ? 1 1
? T
Project Name: RiverGate 1/
Project No. DWQ 05-0045 V
SUBMITTED DESIGN: 1 REQUIRED DESIGN: (((
elevations
Permanent Pool (ft) 594
Temporary Pool (ft) 595.82 1.82 ft. depth ok
areas
Permanent Pool SA (sq ft) 60500 37929 sq. ft. ok
Drainage Area (ac) 39.1
Impervious Area (ac) 33.2 84.9 % -
Forebay (ft2) 9227 15.25124 % ok
High Marsh (ft2) 21530 35.6 % ok
Low Marsh (ft2) 21530 35.6 % ok
Micropool (ft2) 9227 15.25124 % ok
101.676 %
volumes
Temporary Pool (cu ft) 116385 115561 cu. ft. ok
other parameters
SA/DA 3.55 2.23 -
Orifice Diameter (in) 3.5 0.31 cfs drawdown -
Design Rainfall (in) 1 4.4 day drawdown ok
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 80
Project Impervious 84.9
Next Highest 90
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.23
2.4
4 1?,, J 6-5-
Project Name: RiverGate
Project No. DWQ 05-0045
SUBMITTED DESIGN: 2 REQUIRED DESIGN:
elevations
Permanent Pool (ft) 587
Temporary Pool (ft) 588.83 1.83 ft. depth ok
areas
Permanent Pool SA (sq ft) 47629 29800 sq. ft. ok
Drainage Area (ac) 30.8
Impervious Area (ac) 26.1 84.7 % -
Forebay (ft2) 7144 14.999265 % ok
High Marsh (ft2) 16670 35.0 % ok
Low Marsh (ft2) 16670 35.0 % ok
Micropool (ft2) 7144 14.999265 % ok
99.9979 %
volumes
Temporary Pool (cu ft) 91679 90859 cu. ft. ok
other parameters
SA/DA 3.55 2.22 -
Orifice Diameter (in) 3 0.23 cfs drawdown -
Design Rainfall (in) 1 4.7 day drawdown ok
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 80
Project Impervious 84.7
Next Highest 90
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.22
2.4
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Project Name: RiverGate
Project No. DWQ 05-0045
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
elevations
Permanent Pool (ft) 594
Temporary Pool (ft) 595.82 1.82 ft. depth ok
areas
Permanent Pool SA (sq ft) 60500 37929 sq. ft. ok
Drainage Area (ac) 39.1
Impervious Area (ac) 33.2 84.9 % -
Forebay (ft2) 9227 15.25124 % ok
High Marsh (ft2) 21530 35.6 % ok
Low Marsh (ft2) 21530 35.6 % ok
Micropool (ft2) 9227 15.25124 % ok
101.676 %
volumes
Temporary Pool (cu ft) 116385 115561 cu. ft. ok
other parameters
SA/DA 3.55 2.23 -
Orifice Diameter (in) 4 0.40 cfs drawdown -
Design Rainfall (in) 1 3.4 day drawdown ok
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 80
Project Impervious 84.9
Next Highest 90
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.23
2.4
%z
r -
Project Name: RiverGate
Project No. DWQ 05-0045
SUBMITTED DESIGN. 2
elevations
Permanent Pool (ft)
Temporary Pool (ft)
areas
Permanent Pool SA (sq ft) 47629
Drainage Area (ac) 30.8
Impervious Area (ac) 26.1
Forebay (ft2) 7144
High Marsh (ft2) 16670
Low Marsh (ft2) 16670
Micropool (ft2) 7144
volumes
Temporary Pool (cu ft) 91679
other parameters
SA/DA 3.55
Orifice Diameter (in) 4
Design Rainfall (in) 1
Linear Interpolation of Correct SAIDA ***
% Impervious
Next Lowest 80
Project Impervious 84.7
Next Highest 90
587
588.83
REQUIRED DESIGN:
1.83 ft. depth ok
29800 sq. ft. ok
84.7 % -
14.999265 % ok
35.0 % ok
35.0 % ok
14.999265 % ok
99.9979 %
90859 cu. ft. ok
2.22 -
0.40 cfs drawdown -
2.6 day drawdown ok
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.22
2.4
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