2021-02-17_PERMIT FILE - C1980007

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PART I Page 4 of 68 Permit No.: CO0038776 PART I A. PERMITTED FEATURES Beginning no later than the effective date of this permit and lasting through the expiration date, the permittee is authorized to discharge from, and self-monitoring samples taken in accordance with the monitoring requirements shall be obtained from permitted feature(s): Feature Latitude Longitude Outfall Name (° N) (°W) Wastewater Source Receiving Water 005 Pond MB 3 38.927778 107.445278 Equipment and facility wash down water stormwater runoff from coal storage areas NFGR 007 WWTF 38.9275 107.448056 Domestic wastewater NA 008 Pond MB-4 38.928611 107.446944 Wash down water from train loadout NFGR Stormwater runoff from undisturbed native lands and surface runoff from facilities areas 009 Pond MB-5 38.929444 107.452222 including coal stockpiles, buildings, parking NFGR lots, roads, and revegetated soil stockpiles); equipment and facilities washdown water, mine water and treated WWTP effluent 011 Sly Gulch 38.91278 107.44194 Natural groundwater pumped through the Sylvester Gulch Fan ventilation portal 012 Deer Creek 38.8811 107.46189 Mine water inflow discharge from the Deer Dry Fork of Shaft Creek ventilation shaft Minnesota Creek Stormwater runoff from Sylvester Gulch 014 Pond SG-1 38.905278 107.443056 ventilation fan facilities including buildings, Sylvester Gulch graveled roads and pads, and revegetated topsoil piles surface runoff from the refuse pile expansion 015 RPE Pond 38.925833 107.435556 and refuse pile east areas including reclaimed NFGR outslopes and open refuse bench and underdrains Mine Water 017 Treatment 38.910278 107.445833 Mine water discharge Sylvester Gulch Ponds 019 NSSA Pond 38.928333 107.439722 Stormwater runoff from revegetated topsoil NFGR stockpiles 020 CSLY-3 38.922500 107.440278 Stormwater from undisturbed/native lands Sylvester Gulch and road Stormwater only from Drainage Basin 49C1; 021 CSLY-4 38.921389 107.440833 undisturbed/native lands with a short segment Sylvester Gulch of graveled road 107. Stormwater only from Drainage Basin 49132; 022 CSLY-5 38.92 440833 undisturbed/native lands with a short segment Sylvester Gulch of graveled road Stormwater only from Drainage Basin 49131 Et 023 CSLY-6 38.919167 107.441111 47C; undisturbed/native lands with short Sylvester Gulch segments of graveled Et revegetated two-track roads Et a water tank Stormwater only from Drainage Basin 49A5; 024 CSLY-7 38.916944 107.441111 undisturbed/native lands with a short segment Sylvester Gulch of graveled road