NC0004979_Fact Sheet_20210728 (2)

NCDEQ/DWR
FACT SHEET FOR NPDES PERMIT DEVELOPMENT/Major Modification
Duke Energy Carolinas, LLC — Allen Steam Station
NC0004979
Facility Information
Applicant/Facility Name:
Duke Energy Carolinas, LLC — Allen Steam Station
Applicant Address:
P.O. Box 1006, Charlotte, North Carolina 28201
Facility Address:
253 Plant Allen Road, Belmont, North Carolina 28012
Permitted Flow
No limit
Type of Waste:
—100% industrial
Primary SIC Code: 4911 — Electric Services
Facility/Permit Status:
Class I/Active; Major Modification
County:
Gaston County
Miscellaneous
Receiving Stream:
Catawba River (11-
123.5), South Fork
Catawba River
(Lake Wylie)
Regional Office:
Mooresville
Stream Classification:
WS-IV B (Catawba
River) and WS-V B
(South Fork
Catawba River)
State Grid / USGS Quad:
G14 NE
303(d) Listed?
Yes (Catawba River
Only)
Permit Writer:
Sergei Chernikov,
Ph.D.
Subbasin:
03-08-34
Date:
May 10, 2016
Drainage Area (mi2):
635 (Catawba
River)
001: Lat. 35° 11' 23" N Long. 81° 00' 45" W
002: Lat. 35° 10' 30" N Long. 81° 00' 23" W
002A: Lat. 35° 11' 34" N Long. 81° 00' 22" W
002B: Lat. 35° 11' 36" N Long. 81° 00' 30" W
004: Lat. 35° 11' 35" N Long. 81° 00' 22" W
006: Lat. 35° 11' 35" N Long. 81° 00' 22" W
007: Lat. 35° 11' 55" N Long. 81° 00' 36" W
008: Lat. 35° 10' 55" N Long. 81° 00' 24" W
Summer 7Q10 (cfs)
95
Winter 7Q10 (cfs):
95
30Q2 (cfs)
314
Average Flow (cfs):
2470
IWC (%):
23.6 (Outfall 002
and Outfall 006)
SUMMARY
Duke Energy's Allen Steam Station is a coal fired steam electric plant in Gaston County. Units 1, 2,
and 3 are scheduled to retire by December 31, 2024.
The facility is subject to the effluent guidelines - 40 CFR 423.12. The facility is also subject to the
Cooling Water Intake Structure Rule (316(b) Rule) per 40 CFR 125.95 and Coal Ash Management
Act (State Law).
The facility requested a Major Modification to extend compliance schedule for FGD wastewater
from 02/28/2020 to 11 /01 /2020 due to the latest EPA changes to 40 CFR 423. The request has
been granted.
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