2008-03-05_REVISION - M1997054 ‎(32)‎

• Permit No: M1997054
• IBM Index Class Name: REVISION
• Doc Date: 3/5/2008
• Doc Name: Exhibit III.14
• From: Civil Resources, LLC
• To: DRMS
• Type & Sequence: TR4
• Media Type: D
• Archive: No

I. INTRODUCTION
1.01 General
On behalf of Front Range Aggregates, Lyman Henn, Inc. (Lyman Henn) has prepared this
report as a portion of the Mining and Reclamation Permit Application in order to obtain the
Regular (112) Mining and Reclamation Permit for the subject facility. The full permit
application will be prepared and submitted by Applegate Group, Inc. In compliance with the
Rules and Regulations established by the State of Colorado through the Mined Land
Reclamation Act, the Division of Reclamation, Mining and Safety (DRMS), and the Mined
Land Reclamation Board (Board), the following materials outline Front Range Aggregates'
proposed mining and reclamation plans for the subject affected land. Specifically, this report
encompasses submittal of sections of five exhibits required for a DRMS permit. These exhibits
are:
¦ Exhibit B - Index Map
¦ Exhibit C - Premining Plan and Affected Lands
¦ Exhibit D - Mining Plan
¦ Exhibit E - Reclamation Plan
The subject facility is located in Parkdale, Colorado and encompasses the southwest side of
Cactus Mountain, north of Front Range Aggregates' active gravel mining operation which lies
on a terrace on the north side of the Arkansas River. The total disturbed land within the limits
of mining will be approximately 63.6 acres. This permit application will allow Front Range
Aggregates to mine to a bottom elevation of 5300 ft above sea level, excavating an estimated
volume of 25.1 million cubic yards of rock and overburden.
The base map for the quarry has been provided by Front Range Aggregates. This map is based
on aerial photography which has been digitized to produce a topographic map. The base map
was used in the preparation of this mining and reclamation plan including conducting
geotechnical evaluations of pit slope stability of the future mined areas.
1.02 Background Data and References
Geotechnical evaluations for the granite quarry portion of this permit application relied on
information and data from the following three field studies:
1. CTL/Thompson, Inc., 2002. Study included four rock core borings.
2. J.A. Cesare and Associates, 2004. Study included two rock core borings, rock
mapping, and laboratory testing.
3. Lyman Henn, Inc. 2007. Study included rock mapping.
1.03 Observational Method
This permit application describes in detail an "Observational Method" to mine slope
development which will be implemented at the quarry. The highwall and bench configuration
shown represents the most aggressive scenario. The observational method will be used to
develop actual highwall and bench configurations based on observations of actual rock mass
behavior as described below. Maximum build-out benches and highwalls will consist of 50 ft
wide benches and 40 ft highwalls from the highest elevation in the northeast corner of the
mining limits down to elevation 5800 feet above sea level. Below elevation 5800, the benches
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