WQCS00003_NOI_NOI2020DV0261_20200619

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Winston-Salem / Forsyth County
Uti I ities
Water a WasteFrater a Sotid Waste
Administration, P.O. Box 2511, Winston-Salem, NC 27102
0: 336-727-8000, F: 336-727-8432, wskutilities.org
June 19, 2020
Lon T. Snider, Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
450 West Hanes Mill Road, Suite 300
Winston-Salem, North Carolina 27105
EnDepartment cF
vironmental Quality
Received
Winston-Salem
Regional Office
/M/O W, 0/40 SC4 of
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Re: Sanitary Sewer Overflow Civil Penalties Incident #202001085
Dear Mr. Snider:
This letter serves as the official response from Winston-Salem/Forsyth County Utilities to the
North Carolina Department of Environmental Quality, Division of Water Resources Notice of
Intent to Enforce Civil Penalty for the March 25, 2020 sanitary sewer overflow (SSO), Incident
#202001085, located at 4561 Cooper Road near Muddy Creek Wastewater Treatment Plant in
Winston-Salem. The incident was a result of inflow and infiltration caused by severe natural
conditions.
Normal precipitation at Winston-Salem Airport for the month of March is 4.04 inches. In March
2020, 2.7 inches fell and 1.59 inches of that was during the March 23-25 storm event. Rain
began falling on March 23 and did not subside until March 25. Gage height information for
Abbotts Creek (Lexington) and the Yadkin River (Yadkin College) indicate up to seven feet in
stream level rise during the rainfall period. This heavy rain caused Muddy Creek to flood well
outside of its banks.
On March 25, 2020 at approximately 10:30am, during the storm event, Utilities Field
Operations was notified that a manhole near Muddy Creek Wastewater Treatment Plant was
submerged in floodwater. Due to a substantial increase in inflow and infiltration, wastewater
overflowed the sewer main, rose up out of the manhole and mixed with the floodwaters. By
2:00pm that same day, after the rain stopped and the creek subsided, the flow of wastewater
returned to normal.
CRy Coons" Mayor Alen lanes; Denise D. Adams, Mar Pro yoTempors, North Ward; Dan Besse, Southwest Ward; Robert C, Clark, West Ward; John C. Larson,
South Ward; Jeff Madmash, Nor [must Ward; Mortice Ree-TeeseRlurc[t ' Parm, Noart Ward; Ane Scippio, East Ward; James Taykq Wud Jr., Scasme o ;
City Manager: Lee 0. Garrey
County Commissioners: David R. Plpler, Chair; Don Martin, Vice Chair; Flooding El -Amin; Ted Replan; Richard V. Lmaille; Tonya McDaniel; Game D. Whlsenhunq
Call 311or336-727-8000 County manager
Winston-Salens/Fare,th County UNINy Consensus.: Randall S. Turtle, Chair; L. Wesley Curtis, Jr., Vice Chair; Harald F. Day: Tom Gillian, Yvonne H. Hines;
CIiyllnk'4)cityofws.org Duane Long; Hugh W.Jernigan; Chris Parker James Ruffin; Donald R. Stewart; Allan younger

It was determined by our investigation that severe natural conditions were the cause of this
sanitary sewer overflow. WSFC Utilities continues to make progress in minimizing SSOs and has
the proper programs in place to continue our high level of performance.
I hope this information is helpful with your investigation of Incident #202001085. If you require
additional information, please contact me at 336�747-7315. - .
Sincerely,
Courtney Driver, P.E.
Utilities Director
.. cc: Michael Stover, Assistant Utilities Director -Operations
Kenny Atkins, Utilities Field Operations Manager
Antonio Martinez, ORC
File
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