ENFORCE26363

• Permit No: C1980007
• IBM Index Class Name: Enforcement
• Doc Date: 2/19/1993
• Doc Name: Letter Enclosing NOV
• From: DMG
• To: MOUNTAIN COAL CO
• Violation No.: CV1993006
• Media Type: D
• Archive: No

February 19, 1993
NOV C-93-006
Page 2
STEP 2: A report format for the Subsidence Monitoring Reports
needs to be designed for the six-month and year-end report, in
order to fulfill this abatement step. Referencing Stipulation
17, "This report format should recognize the importance of
continual update of subsidence data interpretation, monitoring
of ground water levels and spring flows, monitoring of mine
inflow, and subsurface ground conditions which could be
correlated to subsidence prediction." (In earlier
correspondence between the Division and MCC, during the 1991
(92) Permit Renewal, the Division determined that this
stipulation could be terminated because it had been
incorporated into the permit application. Upon further review
by the Division, it was noted that this stipulation contained
two parts. The first part, which required MCC to submit
reports of its subsidence monitoring program on a semi-annual
basis has been complied with as stated previously; however,
the second part requires submittal of a revised report format,
which has not been complied with. Since, the second part has
not been complied with, the stipulation was not terminated.)
Corresponding with Stipulation 17, MCC should consider, at
least, providing the information required in STEP 3, below, as
part of MCC's year-end submittal. The mid-year submittal
could include a portion of this information.
STEP 3: As mentioned previously, the Division did receive a
Subsidence Monitoring Report on January 19, 1993. Since it
has been one-and-a-half years since the Division has had the
opportunity to review MCC's subsidence data, the following
information must be submitted in order to abate STEP 3:
1. A summary of surveying techniques and monitoring schedule.
2. The elevation difference between the current survey and
the last survey.
3. A comparison of predictions versus actual data.
4. A topography map with the subsidence monuments for the
F-seam and B-seam clearly identified, as well as the bench
mark monuments for each subsidence monitoring network.
5. Amine plan map which shows where mining has occurred
since the last survey and where mining will occur until
the next survey is completed. This map should be the same
scale as the map requested in #4 above, so that the two
maps can be superimposed.
6. A summary of the subsidence results to date.