1996-10-15_GENERAL DOCUMENTS - C1981017

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 10/15/1996
• Doc Name: Bid Documents ‎(IMP)‎
• Media Type: D
• Archive: No

AUG. 9 '96 :25PM DMG,GJCT 1 902 2410226 P.2
_ 5TATE OF
COLORADO
DIVISION OF MINERALS AND GEOLOGY
D epoumenr of Natural Resources PR",
Q 13 Ski man SI.,Room 215
0(•nvpr,Colorado 80203
Phone (10.3)8(,6-3567
FAX:[phone] il
DEPARI'MENT(
August 9, 1996 NATURA
RESOURCE
Ms. Kathleen Sullivan Roy Rome,
Water Quality Control Division Governor
4300 Cherry Creek Drive South lam tYcc utive wa I3�:r�ror cnh�r�c
Denver, Colorado Michacl B (one,
8 0 2 2 2-15 3 0
RE: Coal Basin Reclamation (CDPS No. Cp-0000396)
Dear Ms. Sullivan:
The Colorado Division of Minerals and Geology is in the process of
accomplishing reclamation at the previously permitted coal Basin
Mine, as required by the Colorado Surface Coal Mining Reclamation
Act_ one project being accomplished at the mine this summer
involves reclamation of twin mine entries known as the Rock Tunnel.
The Rock Tunnel drains a portion of the underground .mining
operation. The drainage from the Rock Tunnel is routed through
the 016 ponds, which are regulated by the Water Quality Control
Division.
Reclamation of the Rock Tunnel area includes constructing a new
channel to convey the mine water discharge from the mine entries
toward the 016 ponds. The new channel is sized to convey the
volume of water which drains from the Rock Tunnel .
In order to complete the reclamation process, existinq cinder block
walls within each entry will be partially collapsed in order to
prevent the damming of water within the Rock Tunnel. Currently,
the wall within each entry is creating a pond of water behind it.
When these walls are breached, it is possible that a slug of water
in excess of the channel capacity may be released. In order to
prevent damage to the newly constructed channel, We are requesting
that the drainage be temporarily diverted to the 025 pond.
We anticipate that the 025 pond may receive water from the Rock
Tunnel for about a week. After the water impounded behind the
block walls within the Rock Tunnel is sufficiently drained, we will
again route the discharge to the 016 ponds. We anticipate that the
quality of the water discharged to the 025 pond will mirror the
quality of the discharge reporting to the 016 ponds. However,
total suspended solids content may increase as the dewatering nears
completion. we will attempt to accomplish the dewatering process
so that the volume of discharge does not exceed the current