2019-11-20_HYDROLOGY - M1974004

• Permit No: M1974004
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/20/2019
• Doc Name: SEO Approval of Main Pit Leak Test
• From: Martin Marietta
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

C O L O R A D O John W. Hickentooper
Governor
Division of Water Resources
U :-rtY,=^ o:iiaturs'R ;o rr=s Robert Randall
Executive Director
Kevin G. Rein, P.E.
Director/State Engineer
November 15, 2018
Mr. Jeffrey A. Clark
Bishop-Brogden Associates, Inc.
333 West Hampden Avenue, Suite 1050
Englewood, Co 80110
Transmission via email: [e-mail]
RE: MARTIN MARIETTA MATERIAL, INC. SPECIFICATION AGGREGATE QUARRY MINE GROUNDWATER
SEEPAGE EVALUATION (WDID 0702612)
SPEC AGG QUARRY PIT (WDID 0703031)
NW1/5 OF SECTIONS 15, TOWNSHIP 4 SOUTH, RANGE 70 WEST, 6T" P.M.
WATER DIVISION 1, WATER DISTRICT 7, JEFFERSON COUNTY
Dear Mr. Clark:
The purpose of this letter is to approve the groundwater seepage evaluation requested for the Specification
Aggregate Quarry Pit ("Spec Agg Quarry Pit") (as shown on the attached Figures 2 and 3) located within the
Specification Aggregate Quarry Mine. Spec Agg Quarry Pit is located in the NW1/4 of Section 15, Township 4
South, Range 70 West of the 61h P.M., and was originally mined under the Division of Reclamation Mining and
Safety ("DRMS") Permit No. M1974-004). The decree in case no. 2013CW3053 granted a junior storage water
right from Spec Agg Quarry Pit in the amount of 320 acre-feet for commercial, industrial, reclamation,
irrigation, dust control, concrete production, augmentation, and exchange.
In order to allow the Spec Agg Quarry Pit to store water the decree in case no. 2013CW3053 required, a leak
test to demonstrate that the pit satisfy the Colorado Division of Water Resource Reservoir Administration
Guidelines as they apply to liner for subgrade storage. Therefore although, neither a clay liner, nor slurry wall
was installed at the Spec Agg Quarry Pit due to low permeability material in the surrounding rocks a 90-day
leak test was performed, as required by the decree in case no. 2013CW3053, to assess whether the volume of
ground water seeping into the pit exceeds the State Engineer's allowable leakage rates as referenced in the
August 1999 State Engineer Guidelines for Lining Criteria for Gravel Pits (1999 SEO Guidelines).
According to the 2011 State Engineer General Administration Guidelines for Reservoirs (2011 SEO Guidelines),
rock quarries in low permeability material can be tested in accordance with the 1999 SEO Guidelines. The test
was conducted between April 11, 2018 and July 10, 2018. A site inspection was performed by the SEO on June
20, 2018 to review site conditions and discuss the leakage test plan.
Your report dated October 23, 2018 provides the liner summary and the 90-day leak test results for the Spec Agg
Quarry Pit. The test data provided indicates that ground water seepage into the Spec Agg Quarry Pit is below
the design standard referenced in the 1999 SEO Guidelines. Meeting the design standard requires that during
operation of the Spec Agg Quarry Pit, all water inflows and outflows for the pit area must be accounted for
on a monthly basis.
In the event that the average daily unregulated ground water inflow to the Spec Agg Quarry Pit exceeds the
Performance Standard referenced in the 1999 SEO Guidelines for two consecutive months, as evidenced by the
accounting specified in the preceding paragraph, Martin Marietta Material, Inc. ("Martin Marietta") or their
successor and the SEO shall begin to consult regarding the probable cause of the unregulated ground water
ov._Cps
Office of the State Engineer ��
1313 Sherman Street, Room 821, Denver, CO 80203 P 303,866.3581 I (r
www.water.state.co.us , }
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