1987-02-25_REVISION - C1981012 ‎(2)‎

• Permit No: C1981012
• IBM Index Class Name: Revision
• Doc Date: 2/25/1987
• Doc Name: Group of letters
• From: MLRD
• To: WYOMING FUEL CO
• Type & Sequence: TR7
• Media Type: D
• Archive: No

.,
Richard D. Lamm
Governor
DATE
T0:
FROM
DEPARTMENT OF NATURAL RESOURCES
David H. Getchea. Executive Director
MINED LAND RECLAMATION DIVISION
DAVID C. SHELTON, Director
January 9, 1987
Jim Stevens
Candy Thompson G
RE: WYOMING FUELS PERMIT N0. C-81-012, TECHNICAL REVISIONS 7 and 10
In Wyoming Fuels submittal of December 17, 1986, they state they will return
to the design for Pond 006 as shown in Exhibit 19 of Permit Application. This
design incorporates a trapezoidal spillway to allow discharge during a large
precipitation and/or prep plant pumpage event. With the EPA's revision to
their rules allowing prep plant discharge, the emergency spillway is an
acceptable feature.
Exhibit 19 shows the spillway elevation at 7388 feet or 2.2 acre feet
capacity. The thickener volume is stated as being 704,973 gallons or 2.16
acre feet. With the spillway at this level afoot of freeboard is not
maintained. The 1 foot freeboard should be above the 2.16 acre foot level and
1 foot below the base of the emergency spillway. Also, no dimensions or size
requirements for the emergency spillway are given.
In summary, before the design can be accepted, Wyoming Fuels needs to submit:
1. A design showing 1 foot freeboard,
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6525E
2. the criteria to size the emergency spillway and resulting
dimensions,
3. submittal of revised NPDES permits allowing discharge from Pond 006
of both prep plant water and sewage water. A commitment from
Wyoming Fuels that when or if sewage water is discharged to
Pond 006, that the water will not be recirculated to the prep plant
until it meets the effluent limits applicable to sewage discharges.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]