2018-09-06_HYDROLOGY - M1996049

• Permit No: M1996049
• IBM Index Class Name: HYDROLOGY
• Doc Date: 9/6/2018
• Doc Name: Substitute Water Supply Plan
• From: Wstern Water & Land
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

Western Water & Land, Inc.
June 6,2017
Ms.Megan Sullivan
Colorado Division of Water Resources
1313 Sherman Street,Suite 818
Denver,CO 80203
Amendment to Substitute Water Supply Plan Renewal Request for
Maryland Creek Ranch Gravel Pit
Dear Ms. Sullivan:
Western Water&Land,Inc.,on behalf of Peak Materials(a subsidiary of Kilgore Companies),is
submitting this amendment to the January 23,2017 Substitute Water Supply Plan renewal request for
the Maryland Creek Ranch(MCR)gravel operation in Summit County,CO.The renewal request was
submitted to the Colorado Division of Water Resources by Resource Engineering,Inc.on behalf of
Everist Materials,LLC(Everist).Kilgore Companies recently acquired Everist and as a result, Peak
Materials is the current operator of the MCR gravel pit.This amendment affects only the management
of groundwater pumped from Cell 4 during dewatering operations;no other changes are being made to
the renewal request.
It is noted in the renewal request that dewatering will be performed to support mining operations at Cell
4 and that groundwater pumped from Cell 4 will be discharged to the adjacent Cell 3. Following
submittal of the renewal request,Peak Materials recognized that use of Cell 3 during dewatering may
be limited because of ongoing reclamation and development operations at Cell 3 as well as
uncontrolled inflows to Cell 3 from an un-named intermittent drainage,locally referred to as Vendett
Creek,in response to irrigation return and intermittent runoff. Therefore,minor changes are being made
to the water management procedure outlined in the renewal request to allow the flexibility needed to
accommodate changing conditions and ongoing operations at Cell 3.
Please replace the last sentence on page 2 of the renewal request with the following paragraph:
"Groundwater pumped from Cell 4 will be discharged to the adjacent Cell 3;however,water
may be periodically pumped from Cell 3 and/or discharged directly from Cell 4 to an
approximately 2.0-acre infiltration basin adjacent to the northeast corner of Cell 4.Water
pumped from Cell 3 will be discharged through an existing culvert beneath State Highway 9 to
an infiltration channel along the north side of the highway where the water will infiltrate,
recharging the alluvial aquifer.Any surface discharges from the Cell 4 infiltration basin will be
conveyed in an infiltration channel across the adjacent pasture lands.Any water that does not
infiltrate prior to reaching Maryland Creek will be diverted as necessary to mitigate dewatering
impacts by maintaining water levels in the pit wells and associated wetland areas within the
former Love Pit,located immediately northeast of Maryland Creek Ranch on land owned by
Eagles Nest Mountain Ranch, LLC ."
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