PERMFILE138305

• Permit No: C1981071
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: RN EXHIBIT 1 TO EXHIBIT 8
• Media Type: D
• Archive: No

COLORADO DEPARTMENT F HEALTIi
••~, Water Quality Cont Division
) - - '4210 East 11th Avena' i
Denver, Colorado 80220 ,
•' ~ SUMMARY OF RATIONALE
C~LORPDO YAh1PA COAL COh1PAMY
E C M NE I AND ECKMNN PARK MINE,
MINE 2, and MINE 3
PERMIT NUMBER: CO-0027154
ROUTT COUNTY
TYPE OF FACILITY: Major Industrial - Activity Permit - Renewal
SIC N0: 1211
LOCATION: Southwest of Steamboat Springs, Colorado, in Townships 4
and 5 North, Ranges 85, 86 and 87 West.
CONTACTS: Gary Myers
P.O. Box G
Steamboat Springs, Colorado 80477
(303)+879-3800
RECEIVING WATER: Foidel, Fish and Middle Creeks, which are tributaries of
Trout Creek, which is a tributary of the Yampa River
CLASS: Recreation - Class l; Agricultural Use;
Aquatic Life - Class 1, cold; Water Supply
Effluent Limited Segment
DESIGN FLOW: Sedimentation ponds are designed for the 10-year, 24-hour
precipitation event.
FACILITY DESCRIPTION: The Energy Fuels operation consists of three surface coal
mines, producing approximately 10,700 tons of coal per
day. The coal is crushed on-site and shipped by rail.
The wastewater treatment facilities consist of sedimentation
ponds, generally located in the immediate area and downslope
of mining activity. The ponds collect and treat the runoff
from jhe disturbed areas of the mines and have been designed
for [hz IC-year, 24-hear precipitation even[.
Topsoil is stockpiled for reclamation work, some of which
is currently in progress.
PAST I10NITORING SUI".MARY: Discharges occurring in [he pas[ are essentially related
[o periods of heavy snowmelt/runoff. The parameter of
concern is Total Suspended Solids (TSS). Based on previous
TSS limits of 30 and 45 mg/I, several excursions were noted.
Hoo-~ever, with the new permit limits for TSS of 35 and ]0 mg/I
[he permi[[ee should be able to comply with permit conditions
In addition, new regulations allow for an exemption from
effluent limitations if the discharge results from a hydro-
. logic even[, provided the permit[ee has met the 10-year, 24-h
containment requireinen[s.