ENFORCE36279

• Permit No: C1982057
• IBM Index Class Name: Enforcement
• Doc Date: 10/31/2000
• Doc Name: SENECA II-W MINE PN C-82-057 NOV CV-2000-007
• From: SENECA COAL CO
• To: DMG
• Violation No.: CV2000007
• Media Type: D
• Archive: No

III IIIIIIIIIIIIIIII
A~ 999
SENECA Seneca Coal Company
Coal Company
October 30, 2000 ~~~.;,*,r
~~.v:ae
Ms. Sandra crown CCT 3 ~ •, Ly~
cC~',~
Division of Minerals and Geology piyfslu
DenverheCOa60203e2273Room 215 0p~~+OeialsaadCeology
RE: Seneca II-W Mine, Permit C-82-057, NOV No. CV-2000-007
Dear Ms. Brown:
In response to NOV No. CV-2000-007 for the Seneca II-W Mine,
Seneca Coal Company respectfully submits the following
information for the abatement of the violation. SCC was to
complete construction of sedimentation pond 016 and provide a
certification by a qualified registered engineer that it was
constructed as designed and as approved in the permit by October
31st
At the time of the inspection on September 28th, riprap was
being delivered and placed in the emergency spillway channel. The
principal spillway was already constructed and functional and the
pond was retaining approximately 2-3 feet of water in it as well.
The following construction details were all that was needed to
complete the overall construction of the pond, which was
eventually completed the following week. First, the riprap needed
to be shaped in the emergency spillway channel per the schedule
depicted on Exhibit 13-8A, Sheet 1 of 2, Pond 16 Design. Next,
the trash rack/anti-vortex baffle plate was placed on the
principal spillway pipe. Finally, all topsoil was respread on the
disturbed slopes and embankment down to the anticipated water
level and revegetated with the proper seed mix. The sedimentation
pond 016 construction was deemed complete by the Division, based
on the comments contained in Mr. James Stark's inspection report
dated October 17, 2000.
To the best of my knowledge, based upon my professional
expertise, and to the extent possible, sedimentation pond 016 at
the Seneca II-W Mine was constructed in accordance with the
prudent state-of-the-art methods for earthen embankment
construction. Further, the structure was constructed in
compliance with the approved design, to the extent possible, as
specified in Attachment 13-SB of Seneca Coal Company's approved
mine permit. Minor field adjustments in horizontal and vertical
alignment were necessary during construction to compensate for
unanticipated natural conditions, limit the disturbed area, and
construct a structure consistent with the existing and reclaimed
topography.
~x X70
Seneca Ccal Company • P.O. Draweo-0.+ Hayden, Colorado 61639
Telephone [phone] • FAX [phone]