20000846 Ver 1_Mitigation Information_20100831

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Cq. i P C CAROLINAS, L Setting the Standard for Service
, Geotechnical • Construction Materials - Environmental - Facilities NC Registered Engineering Firm F-1078
August 30, 2010
Mr. John Thomas D D
Raleigh Regulatory Field Office
Wilmington District U.S. Army Corps of Engineers AUG 3 1 2010
33 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587 ATE a?
yyMANDS AND STORMN? H
Reference: Supplemental As-Built Information for Brush Creek Mitigation Area II
Piedmont Triad International Airport
Greensboro, North Carolina
USACE Action ID 200021655, DWQ # 00-0846
ECS Project No. 09-12666C
Dear Mr. Thomas:
On March 23, 2009, ECS Carolinas, LLP (ECS) submitted As-Built Information for Brush
Creek Mitigation Areas I, 11, and 111. The attached "Topographic Survey" is meant to
supplement our previous submittal. In accordance with Special Conditions "v" of the U.S.
Army Corps of Engineers (USACE) permit and "6" of the North Carolina Division of Water
Quality (DWQ) permit, the following as-built information is attached:
1. As-Built Topographic Survey Map
ECS has been monitoring the hydrology and vegetation within BC II since 2008. We are in
the third year of monitoring BC II (2010). ECS previously submitted "As- Built Information"
for Brush Creek Mitigation Areas I, II and III in March 2009 (Cover Letter dated March 23,
2009). As was specified in the original documents, construction of Brush Creek Mitigation
Area II was completed with the exception of the erosion control berm that was to be
removed once herbaceous vegetation was sufficiently established and approved by the
North Carolina Department of Environment and Natural Resources, Division of Land Quality.
The vegetation was determined to be sufficiently established in Spring 2010 and the berm
was removed. As specified in the initial cover letter, as-built drawings of BC-II are included
as a supplement to the initial As-Built submittal.
Due to conditions encountered during construction, the size of the wetland was altered as
necessary. The following alteration was made:
• Based on the permit, the created wetlands in BC II were to be 5.3 acres in area.
After the berm was removed, the actual amount of wetland is calculated to be 9.50
acres (less 0.6 acres for USACE Action ID # SAW200641354241 and DWQ # 00-
1632).
4811 Koger Boulevard e Greensboro, NC 27407 • T: 336-856-7150 , F: 336-856-7160 • www.ecs[imited.com
ECS Carolinas, LLP • ECS Florida, LLC • ECS Mid-Atlantic, LLC . ECS Southeast, LLC ECS Texas, LLP
Supplemental As-Built Information for Brush Creek Mitigation Area 11
Piedmont Triad International Airport
Greensboro, North Carolina
ECS Project No. 09.12666C
August 30, 2010
• Based on the permit, the overall mitigation compliance for BC I, II and III included the
restoration of 7.4 acres of wetland, the creation of 5.3 acres of wetland and the
restoration of 200 linear feet of stream. As determined by the survey following
construction, 6.6 acres of wetland have been restored, 9.50 acres of wetland have
been created and 450 linear feet of stream have been restored.
If there are questions regarding this information, or a need for further as-built information,
please contact us at [phone].
Respectfully submitted,
ECS CAROLINAS, LLP
ON
Denise M. Poulos, LSS
Principal Scientist

David S. Brame
Project Scientist
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Michael T. Brame
Project Scientist
cc: Ms. Cyndi Karoly, DWQ
Ms. Sue Homewood, DWQ
Mr. Mickie Elmore, PTAA
Mr. Chris Arrington, Baker & Associates
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