GENERAL50517

• Permit No: C1981026
• IBM Index Class Name: General Documents
• Doc Date: 10/29/1981
• Doc Name: Proposed Decision and Findings of Compliance
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

. ~' -77-
XV. explosives (2.05.3(6)(x), 9.08)
The explosives section of the permit application can be Found in Volume Z, pages 44-49.
With the acceptance of the folla~iny stipulation by [•lyoming Fuel Company, the Division
Finds the proposed operation to be in compliance:
WYOMING FUEL COMPANY WILL SUBAfIT FOR DIVISION APPROVAL A NARRATIVE AND DRAWINGS,
AS APPROPRIATE, ILLUSTRATING BLASTING [DARNING SIGCJS AIJD SIGNALS AND SITE ACCESS
CONTROL EQUIPMENT AND PROCEDURES [JITHIN 30 DAYS AFTER PERMIT ISSUANCE.
During the preliminary adequacy review process, this Division identified the PlST well
as probably qualifying for a pre-blasting survey. Edith t7fe response to the PAR,
[Jyoming Fuel Company stated that it would inform MST of the right to a pre-blasting
survey. As neither a letter from h1ST stating their desire not to have a survey done,
nor a survey report indicating that [Jyortung Fuel Company has satisfied their obligation
have been submitted, the Division imposes the following stipulation:
WYOMING FUEL COMPANY L1GST FRESENT WRITTEN PROOF TIIAT !-0ST !!AS BEEN h1ADE AWARE
OF THE RIGHT TO A PRE-BLASTING SURVEY. IF MST DESIRGS A SURVEY, [dYOMING FUEL
COMPANY MUST PRESENT A "DESCRIPTION OF PLANS FOR RECORDING' AND REPORTING TO
TFlE DIVISION THE RESULT OF PRE-BLASTZPIG SURVEI'.S" (2.05.3(6) (a) (v) AT THE
MST [JELL. NO BLASTING h1AY OCCUR ZN THE PIT NO. 2 AREA PRIOR TO SATISFACTION
OF THE ABOVE STIPULATION.
XVI. Backfilling and Grading (2.05.3(6), 2.05.3(6)(h))
The reclamation plan, as presenter] in the revision of September 16, 1981, meets all of
the requirements of Sections 2.05.3(6), 2.05.3(9), 2.05.4(2)(x), 2.05.4(2)(c), 4.13
and 4.14 dealing with backfill.ing and grac7iny. The final contours presented in this
revision provide a terrain which "closely resembles the general surfa m configuration
of the land prior to mining and blends into and complements the drainage pattern of
the surrounding terrain, with all of the highwalls and spoil piles eliminated"
(1.04(13)).
The applicant has provided topographic maps derived from aerial surveys conducted
at two separate dates to provide are estimate of the overburden swell encountered at
the site. These surveys were conducted on May I5, 1978 and August 29, 2979 and are
both labeled as Er. hi bit 2 in Addendum II. To determine the overall swell factor,
the total volume mined was subtracted from the total volume backfilled and the
resulting volume of swell was divided by the total volume mined to determine the over-
all swell factor. This survey showed that there was an overall swell factor of 40,
after coal removal. There will be a transfer of approximately 9.7% of the Pit 2 over-
burden into Pit 1. The resulting contours of Pit 2 az~e compatible with surrounding
terrain and are acceptable to this Division. however, if the overall swell encountered
in Pit 2 deviates substantially from the expected values, serious reclamation problems
may occur. In order to identify any inaccuracy in the projected overburden overall
swell, the Division imposes the Following stipulation:
THE DIVISION DIRECTS WYOMING FUEL COh1PANY 'I'O MONITOR THE TOPOGHAP1f.IC CONFIGURATION
OF THE PITS, STOCKPILES AND BACKFILLED SURFACE OF THE MINED AREA, IN ORDER TO
VERIFY THE ACCURACY OF T!lE IR PROJECTION OF A 4~ OVERACT OVERBURDEN SWELL FACTOR.
MONITORING FOR Tl175 PURPOSE Sf1AL7. CONSLST OF ,1N ANNUAL .SIlR VE }', CITIII7, IA'C FIELD
OR AEROPlfOTOGRAMhfETRIC SURVEYING TECHNIQUES ACCEPTABLE TO TlIE DIVISION. lJYOMZNG