ENFORCE20152

• Permit No: C1981041
• IBM Index Class Name: Enforcement
• Doc Date: 4/14/1997
• Doc Name: NOV C-97-001 EXTENSION BEYOND 90 DAYS ROADSIDE MINE C-81-041
• From: DMG
• To: MIKE LONG
• Violation No.: CV1997001
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of NaWral Resources
l :i l 3 Sherman 51.. Room ? I S
Denvcr, Colorado 80203
Phone: 13031 Bbb-3567
FA\:1303) 8328106
DATE: April 14, 1997
TO: Mike Long ~~1In~
FROM: Dan Mathews /~./„I },'•"_I1
RE: NOV extension beyond 90th Day
Roadside Mine NOV No. C-97-001 (Permit C-81-041)
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DEPARTMENT OF
NATURAL
RESOURCES
Roy Romer
Governor
lames 5 LuchheaA
Exec ulive Director
M¢hael B. Long
Div isinn Director
Enclosed is a letter from Larry Reschke of Powderhorn requesting an
extended abatement for NOV C-97-001. I previously extended the
final abatement deadline from April 1 until April 23, which is the
90th day after issuance of the NOV. Due to the time associated
with scheduling an engineering firm to perform stability analyses
associated with pond construction, the April 23 abatement deadline
will not be met.
The NOV was issued for a TSS exceedance at the minewater discharge
point. Initial abatement involved some changes in water routing
within the mine. Discharge TSS levels were reduced from 520 mg/1
on January 14, to 36 mg/1 on January 15 (TSS standard is 70 mg/1).
TSS discharge has been in compliance since that time.
Abatement Step 2 required submittal of a technical revision to
include plans for surface treatment of 004 discharge. This was
deemed necessary due to a history of TSS exceedances at the site
over the past two years. The TR application was submitted in a
timely manner, within the NOV specified timeframe. The final
abatement will involve modification of an existing sediment pond
for use as a minewater treatment pond.
I believe the operator has been diligent in pursuing abatement of
the violation, and that the request for additional time to address
the geotechnical concerns is reasonable. I recommend extension of
the final abatement deadline to May 30, 1997. This time frame
should allow adequate time for the operator to respond to Division
adequacy concerns, and allow for revision approval and pond
construction.