GENERAL39432

• Permit No: C1980007
• IBM Index Class Name: General Documents
• Doc Date: 6/14/1985
• Doc Name: Federal Decison Doc Parts
• From: MLRD
• To: ANACONDA MINERALS CO
• Permit Index Doc Type: Other Permits
• Media Type: D
• Archive: No

-4-
• Stipulation No. 14: THE SUBSIDENCE MONITORING NETWORK SHALL BE SURVEYED
UTILIZING CONVENTIONAL GROUND SURVEYING TECHNIQUES, DESIGNED TO ACHIEVE
HORIZONTAL ACCURACIES COMPLYING WITH THE U.S. DEPARTMENT OF COMMERCE'S "SECOND
ORDER, CLASS II" SURVEY STANDARDS, AND VERTICAL ACCURACIES NO LESS THAN + 0.2
FEET. THIS GRID SHALL BE SURVEYED TWICE PRIOR TO THE INITIATION OF
SUBSIDENCE. IN CONJUNCTION WITH THESE SURVEYS WECCC SHALL SELECT ANO
ESTABLISH A MINIMUM OF SIX TRIANGULATION BENCH hWRK MONUMENTS OUTSIDE THE AREA
OF ANTICIPATED SUBSIDENCE EFFECTS, FOR THE PURPOSE OF CORRELATION WITH AERIAL
PHOTOGRAMMETRIC POST-SUBSIDENCE SURVEYS.
Stipulation No. 15.: WECC HAS REQUESTED PERMISSION TO COMPLETE A
PRE-SUBSIDENCE AERIAL PHOTOGRAMMETRIC SURYEY OF THE SUBSIDENCE MONITORING
GRID, FOR THE PURPOSE OF CORRELATION WITH THE FIELD SURVEY RESULTS. IT IS
WECC'S INTENTION TO UTILIZE AERIAL PHOTOGRAMMETRIC METHODOLOGY TO MONITOR
POST-SUBSIDENCE MOVEMENTS OF THE SUBSIDENCE MONUMENTS. THE RESULTS OF.THE
PRE-SUBSIDENCE FIELD AND AERIAL PHOTOGRAMMETRIC SURVEYS SHALL BE COMPARED FOR
EACH GRID MONUMENT. THE AERIAL SURVEY WILL BE ACCEPTED AS ACCURATE ANO WILL
BE USED FOR SUBSEQUENT PAST-SUBSIDENCE MONITORING, IN THE EVENT THAT THE
AERIAL PHOTOGRAMMETRIC AND FIELD SURVEYS CORRELATE WITH AN AVERAGE SURVEY
POINT LOCATION DEVIATION OF LESS THAN 0.2 FEET VERTICALLY AND 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.
• Stipulation No. 16: WECC 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 8Y A COMPARISON OF TRIANGULATION BENCN 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 7HE 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.
Stipulation No. 17: IN THE EVENT THAT THE 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 18: 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