2009-05-07_HYDROLOGY - M1992074

• Permit No: M1992074
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/7/2009
• Doc Name: Final Agency Actions
• From: CDPHE
• To: Colorado Springs Utilities
• Permit Index Doc Type: Hydrology Report
• Email Name: BMK
• Media Type: D
• Archive: No

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STATE OF COLORADO
Bill Ritter, Jr., Governor
James B. Martin, Executive Director
Dedicated to protecting and improving the health and environment of the people of Colorado
http://www.cdphe.state.co.us
Located in Glendale, Colorado
4300 Cherry Creek Dr. S. Laboratory Services Division
Denver, Colorado 80246-1530 8100 Lowry Blvd.
Phone [phone] Denver, Colorado 80230-6928
TDD Line [phone] [phone]
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Colorado Department
of Public Health
and Environment
May 4, 2009
Ms. Patti Zietlow
- Colorado-Springs-Utilities
MSC 0940
Colorado Springs Utilities
P.O. Box 1103
Colorado Springs, CO 80947-0940
Re: Final Agency Actions: 1) Approval with Modification for Request to Place Inert
Construction and Demolition Debris in the Clear Spring Ranch Gravel Pit #2 - Phase 2
Mining Area, El Paso County, Colorado; and 2) Approval for Request for a Waiver from
the Liner and Groundwater Monitoring Requirements for the Placement of Inert Fill in
the Clear Spring Ranch Gravel Pit #2 - Phase 2 Mining Area, El Paso County, Colorado
Dear Ms. Zietlow:
The Hazardous Materials and Waste Management Division of the Colorado Department of
Public Health and Environment ("the Division") has reviewed the subject requests. The Request
to Place Inert Construction and Demolition Debris in Gravel Pit #2 - Phase 2 Mining Area ("Fill
Request") was received in our office on January 28, 2009. Prior to evaluating the Fill Request,
Colorado Springs Utilities (CSU) was asked to provide a formal waiver request to the Division
seeking relief from constructing a liner beneath Gravel Pit #2 as well as waiving the groundwater
monitoring requirements. The Request for a Waiver from the Liner and Groundwater
Requirements for the Placement of Inert Fill in the Clear Spring Ranch Gravel Pit #2 - Phase 2
Mining Area (Waiver Request) was received in our office on April 1, 2009.
Gravel Pit # 2 is an active mine operating under Permit M-1992-074, issued by the Colorado
Division of Minerals and Geology (now known as the Division of Reclamation Mining and
Safety). After the mining has been completed, Gravel Pit #2 will be backfilled with inert
material, according to the Certificate of Designation (CD) issued by El Paso County, CD-04-001.
According to the Fill Request, the material to be placed within Gravel Pit #2 will be restricted to
inert non-putrescible materials such as soil, gravel, concrete, asphalt, and other inert solids
generated from CSU and other City of Colorado Springs projects. Although the facility's
Engineering Design and Operations Plan (EDOP) states that fill materials will not be accepted
from non City-owned generators, and the fill material will be periodically spot-checked for non-
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