HYDRO26008

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 9/22/1995
• Doc Name: STORMWATER MANAGEMENT PLAN POWDERHORN COAL CO
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

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004 - RSN mine water discharge including approximately 5.6
acres of surface runoff associate with the decline area around
the mine portal.
005 - Portions of the
undisturbed area between
ditch above. Runoff from
through Pond 9 prior to
storage yard with fuel
storage.
toadside Refuse Disposal Area and
the disposal area and a diversion
approximately 25.4 acres is routed
discharge. This area includes a
dispensing and petroleum product
006 - Easterly portions of the RSN yard area. Runoff from
approximately 10.6 acres is routed through Pond 4 prior to
discharge. This area includes a raw coal stockpile,
screening, crushing and conveying facilities, and a topsoil
stockpile.
007 - Westerly portions of the RSN yard area. Runoff from
approximately 8.9 acres is routed through Pond 5 prior to
discharge. This area includes a shop, storage areas,
bathhouse, parking areas, topsoil stockpiles, fuel dispensing
and petroleum product storage.
008 - The RSS portal area, the preparation plant, a portion of
the Roadside Refuse Disposal area and undisturbed area to the
top of the hill above the mine site. Runoff from
approximately 47.9 acres is routed through Pond 8 prior to
discharge. This area includes parking lots, offices,
bathhouses, shops, warehouses, the preparation plant and
associated conveyors, chemical storage building (cations and
flocculants used in the coal preparation plant), a raw coal
stockpile, fuel dispensing and petroleum product storage.
009 and 010 - The Unit Train Loadout (UTL) within the Loadout
rail loop. Runoff from approximately 42.9 acres is routed
through Ponds 1 and 2 prior to discharge. This area is used
for a clean coal stockpile, loading trucks and trains and
includes non-discharging sewage lagoons.
011 - Cameo Refuse Disposal Area No. 1 (CRDA 1) Runoff from
approximately 30.4 acres is routed through Pond 6 prior to
discharge. This area includes the active refuse disposal
area, the reclaimed portion of the pile and the slope to the
top of the hill above the disposal area.
012 - Easterly portion of the North Decline area. Runoff from
approximately 12.8 acres is routed through Pond 7 prior to
discharge. This area was reclaimed in 1982 and a permanent
seed mix planted.
013 - Cameo Refuse Disposal Area No. 2(CRDA 2) Runoff from
approximately 32.0 acres is routed through Pond 10 prior to