1995-10-27_REVISION - M1977002HR

• Permit No: M1977002HR
• IBM Index Class Name: Revision
• Doc Date: 10/27/1995
• Doc Name: REGULAR OPERATION 112 RECLAMATION PERMIT APPLICATION FORM
• Type & Sequence: CN1
• Media Type: D
• Archive: No

• •
Exhibit Page 13
EXHIBIT D - MINING PLAN
Colorado
MUNROE QUARRY
�] (M-77-002HR)
Larimer County, CO
Safety & Envrionment Office Rapid City, SD 57709-0767 1 [phone] FAX [phone]
Mining will be a continuation of the existing 9.9 acre mining operation, which has been in existance
since 1977.
1. Topsoil cover (estimated four inches or less) will be removed by a bulldozer and
stockpiled for future reclamation. Stockpile will be protected, as needed, by seeding or use
of cover material or agents, and will be located in previously mined areas not yet reclaimed.
2. Dolomitic shale will be removed by bulldozer or drilling and blasting. The material (up to
35 feet thick) will be hauled to previously mined areas and used for backfill.
3. Gypsum will be extracted from a bed of 25-35 feet thickness by drilling and blasting.
4. Shotrock gypsum will be used as a feedstone for a portable crusher, to be placed with
stockpiles of feedstone and crushed product in a pit area where material has been
previously extracted but not yet reclaimed.
5. Crushed gypsum in various sizes will be stockpiled and then loaded by wheeled loader
into over-the-road haul trucks and trailers.
6. Depending on thickness of the bed, the area disturbed during each mining season will be
approximately one-half to one-acre. Normally, the gypsum bed will be mined in a single
bench, although benching will be done as necessary to allow access for quarry equipment
for stripping, drilling and blasting of overburden and gypsum. Additional benching will be
done when necessary to minimize safety hazards associated with falling rock from
highwalls.
7. The existing ranch road which passes by the current quarry operation will continue to be
used as the access and haul road, with short spur roads built to reach other gypsum
deposits as necessary. The spur roads will be reclaimed when no longer needed for mining:
the ranch road will remain.
8. No toxic or acid-forming materials will be exposed during extracting operations. All
waste rock, including overburden, will be stored away from surface drainage ways and
stabilized to minimize erosion and off-site wind or water deposition.
9. No chemicals will be used on site except for normal petroleum, oils and lubricants for
vehicles and equipment, water and dust suppressants for dust control.
10. Dust supressants (including but not limited to magnesium chloride brine, lignous sulfate
and other accepted agents) and water will be used for dust control as needed. Water will
be imported to the site via water truck.
11, A portable chemical toilet and other sanitary and safety equipment and facilities will be
located on site and moved as needed to support the operation. Pumping and maintenance
will be contracted out: human waste and ordinary solid waste will be disposed of off-site. No
other structures, including ditches, buildings, or impoundments except those required for
storm water control and protection of danger and reclaim areas are anticipated to be placed.
Colorado Lien Company 16.10.95
112 Permit Conversion Application: Munroe Quarry CL-MQ-AP-11-D01-0995