PERMFILE45386

• Permit No: M2001035
• IBM Index Class Name: Permit File
• Doc Date: 8/9/2001
• Doc Name: FN M-2001-035 TROUT CREEK PIT 112C DECISION LETTER CONDITIONS FINANCIAL&PERFORMANCE WARRANTY REQUEST
• From: DMG
• To: ACA PRODUCTS INC
• Media Type: D
• Archive: No

STATE ~,
OF iiiiiiiiiiiiiiuiii
COLORADO

DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
DIVISION O F
Denver, Colorado 80203 MINERAL S
Phone: [phone] &
FAx:[phone]
GEOLOGY
RECLAMATION
AngUS[9,2001 MINING•SAFETY
Mc Charles K. Murphy col,°~a"°
ACA Products, h1C. Greg E. Walther
P. O. BOX 1887 Executive Direcor
Buena Vista, CO 81211 Michael R. Long
Division Director
Re: File No. M-2001-035, Trout Creek Pit, 112c Decision Letter - Conditions, Financial and
Performance Warranty Request -Construction Material Operation
Deaz Mr. Murphy:
On August 6, 2001, [he Division of Minerals and Geology approved your 112c mining permit application. The
conditions to the approval are noted below:
Stipulation: No. l
The quarry cut slopes will be in accordance with the adequacy response recommendations of R. J. Irish
in his report "Rock Cut Slope Stability Assessment, Planned Rock Quarry, Trout Creek Valley, Chaffee
County Colorado, Job No. 559". The cut slopes will be benched with 10 feet wide steps spaced about
20 fee[ apart in elevation and with risers drill-and-blast excavated to .25h:1v (76° slopes). The risers of
the cut-slope will be dressed by barring down loose rock. The benches will be sloped [o their terminis
to limit seepage into the jointed rock. A drainage ditch will be excavated immediately up slope of the
quarry to divert surface water runoff around the quarry.
Stipulation No.2
ACA Products will prepare industry standard blast reports for each blast in the quarry and, copies will
be submitted to the Division with each annual report.
A maximum charge weight of 42 lbs. per delay will not be exceeded without Division approval. Nine
millisecond delays will be used. The delay time will not be lessened without Division approval.
Each blast in the quarry will be monitored at the dam. A seismograph will be placed on bedrock at the
base of the dam. Blast frequency and peak particle velocity will be measured for each blast. Blast
frequencies will be limited to no less than 30 Hz. Peak particle velocity will not exceed 2 ips. The dam
seismograph monitoring data will be kept by the operator and made available to the Division upon
request.