2009-03-17_PERMIT FILE - M2008078 ‎(3)‎

• Permit No: M2008078
• IBM Index Class Name: PERMIT FILE
• Doc Date: 3/17/2009
• Doc Name: Adequacy Review 01 Response with Attachments
• From: J&T Consulting, Inc.
• To: DRMS
• Email Name: MAC
• Media Type: D
• Archive: No

Lamar Light and Power
100 North Second
Lamar, CO 81052
February 16, 2009
Re: Agreement for Compensation for Damage to Structures within 200 feet of mining
activities, and Agreement to Allow Relocation of Overhead Power Line
To Whom It May Concern:
GP Ranches, LLC has applied to Prowers County (County) for a Special Use Permit, and
to the State of Colorado's Division of Reclamation, Mining, and Safety (DRMS) for a
Reclamation Permit to allow sand and gravel mining on property within 200 feet of
structures adjacent to the property. The Colorado Mined Land Reclamation Act provides
protection for your structures located within 200 feet of the mining activities.
DRMS Permit approval requires a notarized agreement between the applicant and owners
of structures within 200 feet of the mining activities, providing compensation for any
damage to the structure; or preparation of an engineering evaluation acceptable to the
DRMS, demonstrating that such structure(s) shall not be damaged by the mining activities
if an agreement cannot be reached.
GP Ranches, LLC has had an engineering evaluation performed to determine acceptable
setbacks from their proposed mining permit boundary and mining limit to structures
adjacent to the mining. The proposed mining slopes and setbacks were analyzed using the
XSTABL v5.105a computer program. XSTABL was designed to analyze the slope stability
of earth embankments subjected to several critical situations that may occur during the life
of the embankment. The procedure searches for circular shear failures and automatically
searches for the lowest safety factor. 2,000 separate failure surfaces were analyzed for
each case. The required minimum safety factors are based on the current standards used
by the Colorado State Engineer's Office (SEO) for high hazard embankment dams, and
industry accepted standards for the evaluation of embankments during construction. The
safety factors attained using the setbacks shown on the Mining Plan are greater than the
required safety factors specified by the SEO for an earth embankment during construction,
and an earth embankment subjected to earthquake loading, based on the United States
Geological Survey earthquake peak acceleration factors for the area. This evaluation
indicated that damage to structures adjacent to the mining should not occur, even during
earthquake conditions, which are very unlikely to be present.
With this letter, GP Ranches, LLC requests your authorization to conduct mining and
GP Ranches, LLC 7991 Shaffer Parkway, Suite 200, Littleton, CO 80127 (303) 3bV-*1uu