GENERAL35149

• Permit No: C1980007
• IBM Index Class Name: General Documents
• Doc Date: 6/17/1985
• Doc Name: Proposed Decision & Findings of Compliance for PR2
• From: Permanent Waste Pile
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

-62-
Stipulation No. 21
IN THE EVENT THAT 7HE AERIAL PHOTOGRAMMETRIC MONUMENT SURVEYS FAIL
TO MEET THE STIPULATED ACCURACY CRITERIA, WECC SHALL UTILIZE
TRADITIONAL FIELD SURVEY TECHNIQUES TO ESTABLISH THE REASONS FOR
LACK OF CORRELATION. IF THE RESULTS CANNOT BE CORRELATED, WECC
SHALL RESUME TRADITIONAL FIELD SURVEY MONUMENT MONITORING, IN
COMPLIANCE WITH THE ACCURACY CRITERIA AND STANDARDS CONTAINED WITH
STIPULATION N0. 14.
Stipulation No 22
THE DIVISION DIRECTS WECC TO SUBMIT REPORTS OF ITS SUBSIDENCE
MONITORING PROGRAM ON A SEMI-ANNUAL BASIS, COMMENCING ONE MONTH
AFTER THE INSTALLATION AND INITIAL SURVEYING OF THE SUBSIDENCE
MONUMENTS. FURTHER, DUE TO THE COMPLEXITY OF THE PERMIT AREA
GEOLOGY, PRESENCE OF LANDSLIDES AND STEEP SLOPES, AND SENSITIVE
HYDROLOGIC ELEMENTS, WECC IS DIRECTED TO SUBMIT A PROPOSED
SUBSIDENCE MONITORING
REPORT FORMAT TO THE DIVISION FOR APPROVAL. 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. THIS REPORT
FORMAT SHALL BE APPROVED BY THE DIVISION PRIOR TO THE COMMENCEMENT
OF EXTRACTION OF COAL WITHIN THE SUBSIDENCE TEST PANEL DESIGNATED
IN APPENDIX A TO WECC'S NOVEMBER, 1984 PERMIT REVISION APPLICATION
(PANEL 1W-1S).
Stipulation No. 23
THE DIVISION DIRECTS WECC TO COMPLETE A DETAILED ANALYSIS OF THE
POTENTIAL EFFECTS OF SLOPE STABILITY UPON THE STABILITY OF THE
LANDSLIDE DEPOSIT LOCATED ABOVE THE TOWN OF SOMERSET, REFERENCED ON
PAGE 30 OF EXHIBIT 3.4.8.A OF THE REVISED PERMIT APPLICATION. WECC
SHALL INSTALL AND MONITOR AN APPROPRIATE SET OF MONUMENTS ON THE
LAND SLIDE DEPOSIT IN ORDER TO OBSERVE THE POTENTIAL DISPLACEMENT
OF THE LANDS FORM. THE DETAILED ANALYSIS SHALL BE COMPLETED AND
SUBMITTED TO THE DIVISION FOR REVIEW. NO PILLAR RECOVERY SHALL
OCCUR WITHIN THE AFFECTED PANELS PRIOR TO RECEIPT OF DIVISION
APPROVAL. IF SUBSIDENCE MONITORING EXPERIENCE OR THE DETAILED
STABILITY ANALYSIS INDICATES THAT SECONDARY EXTRACTION WOULD
ADVERSELY AFFECT THE STABILITY OF THE LANDSLIDE DEPOSIT ABOVE THE
TOWN OF SOMERSET, THEN WECC SHALL LIMIT THE EXTRACTION OF THESE
PANELS TO 50Y. THE AFFECTED PANELS ARE THE THREE NORTHERN MOST
PANELS TO THE WEST OF THE MAINS WITHIN SECTION 17.