2008-11-19_HYDROLOGY - M2001107

• Permit No: M2001107
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/19/2008
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Clear Water Solutions
• Permit Index Doc Type: Hydrology Report
• Email Name: MAC
• Media Type: D
• Archive: No

Mac
DEPARTMENT OF NATURAL RESOURCES
DIVISION OF WATER RESOURCES
Bill Ritter, Jr.
Governor
November 12, 2008 Harris D. Sherman
Executive Director
Dick Wolfe, P.E.
Rachel Kullman RECOVED Director
Clear Water Solutions
8010 S. Country Road 5, Ste. 105 ?y 19 2008
Windsor, CO 80528 Division or i<eciamauorr.
Mining and SeeV
RE: Substitute Water Supply Plan NCCI Pit #1, M-2001-107 (WDID 0202566)
Section 24, T2N, R67W, 6th P.M.
Water Division 1, Water District 2, Weld County
Approval period: January 1, 2009 through December 31, 2009
Contact phone number for Ms. Rachel Kullman: 970-223-3706
Dear Ms. Kullman:
We have received your letter of October 31, 2008, requesting renewal of the above
referenced substitute water supply plan to cover depletions caused by an existing gravel mining
operation operated by Northern Colorado Constructors, Inc. ("Applicant'). The required fee of
$257.00 for the renewal of this substitute supply plan ("SWSP") has been submitted (receipt no.
3634749). The original supply plan was approved on December 30, 2002 and the SWSP was
most recently renewed on January 8, 2008.
Plan Operation
This plan seeks to replace depletions resulting from mining at the NCCI Pit #1 ("NCCI
Pit' - WDID 0203016). There will be a dewatering trench around the active mining cell. Water
from the trench will be collected in a process water pond then pumped to a sedimentation
pond. After sedimentation, the water will be returned to Little Dry Creek where it will flow back
to the South Platte River. In addition, the dewatering trench will include two 20 ft x 300 ft and
two 20 ft x 200 ft ponds; another 100 ft x 200 ft pond will be used for process water for the
concrete plant. The total exposed water surface at the site is 2.73 acres.
In order to provide a buffer to neighboring wells from dewatering, the Applicant
constructed two recharge ditches on the southern end of the property. The Applicant will place
a portion of its dewatering water into these recharge ditches.
Depletions at the site will result from evaporation, water lost in mined product, concrete
production, asphalt production and dust control. The lagged depletions will be replaced using
fully consumable effluent leased from the City of Thornton ("Thornton").
The reclamation plan for the NCCI Pit is to place a compacted clay liner around the
interior of the mine slopes for the purpose of preventing groundwater seepage from entering
the pit. The applicant has bonded for lining of the pit through the Colorado Division of
Reclamation Mining & Safety.
Office of the State Engineer
1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: [phone] • Fax: [phone]
www.water.state.co.us