2016-10-28_REPORT - M2004031

• Permit No: M2004031
• IBM Index Class Name: REPORT
• Doc Date: 10/28/2016
• Doc Name: Annual Fee/Report/Map
• From: Hazeltine Mine
• To: DRMS
• Annual Report Year: 2016
• Email Name: TOD
• Media Type: D
• Archive: No

COLORADO
Division of Water Resources
1313 Sherman Street, Room 821
Denver, CO 80203
May 25, 2016
Aggregate Industries, Inc.
1687 Cole Boulevard, Suite 300
Golden, CO 80401
c/o Gary Linden (Tetra Tech Inc.) Gary.LindenCtetratech.com
RE: SLURRY WALL LINER APPROVAL
Hazeltine Mine Reservoir(WDID 0203381)
Hazeltine Mine Pit, DRMS M-2004-031 (WDID 0203030)
SW1/4 of the NE1/4, SE1/4 of the NE1/4 of Section 4, T7N, R69W, WATER DIVISION 1,WATER
DISTRICT 2
Dear Mr. Linden:
The purpose of this letter is to approve the lining of the Hazeltine Mine Reservoir. This reservoir is located
in the SW1/4 and the NW1/4 of the SE1/4 of Section 9, Township 2 South, Range 67 West of the 61' P.M.
and is a part of the Hazeltine Mine gravel pit (DRMS M-2004-031). Hazeltine Mine Reservoir was lined with a
soil bentonite slurry wall. The slurry wall leak test initially commenced December 4, 2016. Site inspection
was performed by our office on December 10, 2015 to review site conditions and discuss the leak test plan.
After the initial leak test starting date it was discovered that the Parshall flume measuring flow entering
the mine from Bull Seep has been installed backwards. On January 14, 2016 the flume installation was
corrected. Therefore the slurry wall leak test start date was changed to January 14, 2016. The leak test
concluded on April 14, 2016.
Your report received May 9, 2016 provides the liner summary and leak test result. The test data provided
indicates that the reservoir has been lined to the design standard referenced in the August 1999 State
Engineer Guidelines for Lining Criteria for Gravel Pits (1999 SEO Guidelines). Meeting the design standard
requires that during reservoir operations all water inflows and outflows for the liner perimeter
enclosed area be accounted for on a monthly basis.
With this liner approval, the Hazeltine Mine Reservoir is now classified as a lined reservoir in accordance
with the 1999 SEO Guidelines. Water shall not be impounded in the reservoir except pursuant to lawful
diversions allowed by statute or decree. At all other times, all inflow of water into the reservoir from any
source, including precipitation and ground water inflows shall be removed to prevent illegal storage of
water. Prior to ANY use of this site, the owner or operator wilt need to coordinate with Brent Schantz,
River Operations Coordinator, to review operations, measurement structures, stage-storage curves, and
accounting.
Please contact me at the number below if you have any questions.
Sincerely,
cokal&'64
loana Comaniciu, P.E.
Water Resource Engineer
ec: Brent Schantz, River Operations Coordinator ([e-mail]))
Louis Flink, Diversion Records Coordinator ([e-mail])
WDID File (0203381, 0203030)
1313 Sherman Street, Room 821,Denver,CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.us
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