20001195 Ver 17_Revised Monitoring Report_20210401

March 31, 2021 (Rev February 23, 2021)
Ms. Sue Homewood Environmental Specialist II
NCDEQ – Division of Water Quality 450 West Hanes Mill Road, Suite 300
Winston Salem, NC 27105
RE: Deicing Pad and South Crossfield Taxiway Project at CLT Airport
401 Water Quality Certification WQC004233 (City of Charlotte) DWR Project 20001195 V17 (USACE Action ID. No. SAW-2018-01071) Proposed Replacement Stream Monitoring Points Dear Ms. Homewood:
As we discussed on Friday March 19, we have revised two of our initially proposed baseline monitoring locations for the Deicing Pad and South Crossfield Taxiway in-line detention basin as required by the conditions of our 401 Water Quality Certification. We are sending this correspondence for your review and approval of the proposed replacement
monitoring locations S25-1 and S25-4. You will recall that the S25-1 location was positioned just south of the proposed dam and was in an area of significant stream-bank erosion. The new S25-1 location is approximately 220 yards distant from the water line crossing and outfall of the structure, just prior to a point where a small tributary
enters the main stream from the east. The original S25-4 location was replaced due to the proximity and potential influence of the Byrum drive culvert. The new S25-4 location was verbally already agreed upon in our meeting and is
located approximately 150 feet downstream of the original. Attached is a map identifying the original and two newly
selected locations, as well as photographs to document the new selections. The locations of the replacements are identified as follows:

Location
Number
Description Photo Numbers
S25-1 Coffee Creek – selected point, upstream, and downstream 1, 2
S25-1 Coffee Creek – far downstream 3
S25-4 Coffee Creek – selected point 4
S25-4 Coffee Creek - downstream, upstream 5,6
Please feel free to call with any questions.
Sincerely,
Jimmy D. Jordan
Jimmy D. Jordan, P.G. Environmental Manager
LJH/ms Enc. Basin Map and Photos cc: Kelly Thames/HDR
Amber Leathers/CLT
T:\Current Projects\AF18-008 Deice Pad SCF Program Master\Correspondences\Basin Monitoring\FINAL Revised Proposed Monitoring Homewood 033121.docx
Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

2

PHOTO 1 – Proposed new monitoring point S25-1, looking upstream. Rocks in foreground, suggested sampling
location. Original planned location shown near sandbar in distance. Location of white pickup truck in far distance is
at water line crossing and is near the outfall of proposed structure.

Previous
location
Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

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PHOTO 2 – Proposed new monitoring point S25-1, view immediate downstream

Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

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PHOTO 3 – Proposed new monitoring point S25-1, view distant downstream
Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

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PHOTO 4 – Proposed new monitoring point S25-4, location

Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

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PHOTO 5 – Proposed new monitoring point S25-4, view downstream
Regional Detention Basin Proposed Monitoring Location Photos
Deicing Pad and South Crossfield Taxiway
March 31, 2021 (Rev February 23, 2021)

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PHOTO 6 – Proposed new monitoring point S25-4, view upstream

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XSD
S25-1
N: 529486.0492
E: 1419803.5668
S25-2
N: 530171.6700
E: 1419494.6650
S25-4
N: 530523.5081
E: 1419290.8452
S25-3
N: 530257.0870
E: 1419090.4980
S32-2
N: 530455.5240
E: 1418895.1860
S34-1
N: 530359.1700
E: 1419800.9150
S32-1
N: 530415.9410
E: 1418632.6860
PLOT DATE:FILE NAME:188970-PKG1-MONITORING.DWG Apr 01 . 2021 - 4:16PMDATE
CLT DEICING PAD & SOUTH CROSSFIELD TAXIWAY
1001 MOREHEAD SQUARE DRIVE
SUITE 610
CHARLOTTE, NC 28203
T 704-342-5401 I www.wsp.com
WSP USA INC.
NORTH CAROLINA
LICENSE NO. F-0165 SCALE
DESIGNED DRAWN CHECKED APPROVEDPACKAGE 1
REGIONAL DETENTION BASIN MONITORING LOCATIONS
03/31/21
JJ TMS MPD JJ
1" = 100'
EXHIBIT
LIMITS OF
DISTURBANCE
(TYP)
EXISTING
TOP OF BANK
(TYP)
CONCRETE
SPILLWAY
BYRUM DRIVE
TIMBERLY PLACEEXISTING COFFEY
CREEK CENTER
(TYP)
LEGEND
MONITORING LOCATIONS / STATIONS
FLOOD LIMITS
LIMITS OF DISTURBANCE
FLOOD LIMITS
(TYP)