1992-12-16_GENERAL DOCUMENTS - C1980007

• Permit No: C1980007
• IBM Index Class Name: General Documents
• Doc Date: 12/16/1992
• Doc Name: Proposed Decision & Findings of Compliance for RN2
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

HORIZONTALLY, WITH SURVEY POINT LOCATION DEVIATIONS OF LESS THAN 0.4 FEET
VERTICALLY AND HORIZONTALLY FOR LESS THAN 95% OF THE SURVEY POINTS, AND
WITH NO SINGLE SURVEY POINT LOCATION DEVIATION VERTICALLY OR HORIZONTALLY
IN EXCESS OF 0.8 FEET.
STATUS: Forgiven
Stipulation No. 15
MCC HAS REQUESTED PERMISSION TO COMPLETE AERIAL PHOTOGRAMMETRIC SURVEYS
OF THE SUBSIDENCE MONITORING GRID SUBSEQUENT TO THE INITIATION OF
SUBSIDENCE, FOR THE PURPOSE OF MONITORING SUBSIDENCE MONUMENT MOVEMENTS.
THE ACCURACY OF THE AERIAL PHOTOGRAMMETRIC SURVEYS SHALL BE DETERMINED BY
A COMPARISON OF TRIANGULATION BENCH MARK MONUMENT FIELD AND AERIAL
PHOTOGRAMMETRIC SURVEY RESULTS FOLLOWING EACH SEMI-ANNUAL SURVEY. THE
RESULTS OF EACH AERIAL PHOTOGRAMMETRIC SURVEY SHALL BE ACCEPTED AS
ACCURATE, IN THE EVENT THAT THE AERIAL PHOTOGRAMMETRIC AND MOST RECENT
ANNUAL TRIANGULATION MONUMENT FIELD SURVEY RESULTS CORRELATE WITH AN
AVERAGE TRIANGULATION MONUMENT LOCATION DEVIATION OF LESS THAN 0.2 FEET
VERTICALLY AND HORIZONTALLY, WITH TRIANGULATION MONUMENT LOCATION
DEVIATIONS OF LESS THAN 0.4 FEET VERTICALLY AND HORIZONTALLY FOR LESS
THAN 83% OF THE TRIANGULATION MONUMENTS, AND WITH NO SINGLE TRIANGULATION
POINT LOCATION DEVIATION VERTICALLY OR HORIZONTALLY IN EXCESS OF 0.8 FEET.
STATUS: Forgiven
Stipulation No. 16
IN THE EVENT THAT THE AERIAL PHOTOGRAMMETRIC MONUMENT SURVEYS FAIL TO
MEET THE STIPULATED ACCURACY CRITERIA, MCC SHALL UTILIZE TRADITIONAL
FIELD SURVEY TECHNIQUES TO ESTABLISH THE REASONS FOR LACK OF
CORRELATION. IF THE RESULTS CANNOT BE CORRELATED, MCC SHALL RESUME
TRADITIONAL FIELD SURVEY MONUMENT MONITORING, IN COMPLIANCE WITH THE
ACCURACY CRITERIA AND STANDARDS CONTAINED WITH STIPULATION NO. 15.
STATUS: Forgiven
Stipulation No 17
THE DIVISION DIRECTS MCC 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, MCC 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 MCC'S NOVEMBER 1984 PERMIT REVISION
APPLICATION (PANEL 1W-lS) .
STATUS: Active
-7-