REV89080

• Permit No: M1993041
• IBM Index Class Name: Revision
• Doc Date: 8/31/1994
• Doc Name: REGULAR 112 PERMIT AMENDMENT APPLICATION General
• Type & Sequence: AM1
• Media Type: D
• Archive: No

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CMLRB 112 Permit Application Amendment
Dowe Flats Mine
INTRODUCTION AND OVERVIEW
AGRA E&E Project E94-7033
August, 1994
In February 1994, the CMLRB approved a Regular 112 permit for the Dowe Flats Mine, File
No. M-93-041 for mining and reclamation which was submitted in June of 1993. This
amendment to that permit is necessary because the Boulder County Board of Commissioners
approved a Special Use application that changed the reclamation plan and added a
crushericonveyor system as the rock transportation method. Southdown is applying for an
amendment to the permit to accommodate:
• a revised reclamation plan resulting in a grassland prairie ecosystem;
• addition of a belt conveyor system as the primary and long term method of
transporting production rock from Dowe Flats to the cement plant south of
' Highway 66; and
• addition of a primary crusher at Dowe Flats to reduce rock size and provide
loading onto the conveyor system.
The amended reclamation plan will reduce the acreage of disturbance, dust emissions
(because reclamation equipment is moving shorter distances), water augmentation needs
(because less groundwater is exposed), and potential archaeological disturbance.
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The original Dowe Flats Mine June 1993 Regular 112 permit application document and
Southdown's January 10, 1994 and February 21, 1994 responses to CMLRB adequacy
review letters are referenced where applicable in this amendment application. Technical
Appendices submitted as part of the original application may be referred to in the subsequent
adequacy review letters or in this amendment application. The applicant (Southdown, Inc.)
accepts the six conditions that the Board imposed on the original permit.

' ~YAGRA
Earth & Environmental