2018-10-22_REVISION - M1973021

• Permit No: M1973021
• IBM Index Class Name: REVISION
• Doc Date: 10/22/2018
• Doc Name Note: Amendment
• Doc Name: Response To Application Consideration Notice
• From: DWR
• To: DRMS
• Type & Sequence: AM6
• Email Name: ECS
• Media Type: D
• Archive: No

A7COLORADO
Division of Water Resources
Response to Consideration of 112 Construction Materials Reclamation Permit Amendment
Application
DATE: October 22, 2018
TO: Eric Scott, Environmental Protection Specialist ([e-mail])
CC: Division 1 Office, District 9 Water Commissioner
FROM: Colin Watson, P.E.
RE: Aggregate Industries Morrison Quarry, File No. M-1973-021 (AM06)
Applicant/Operator: Aggregate Industries - WCR, Inc.; [phone]
Sections 10 8 11, Twp 5 South, Rng 70 West, 6th P.M., Jefferson County
CONDITIONS FOR APPROVAL
® The proposed operation does not anticipate exposing groundwater. Therefore, exposure of ground
water must not occur during or after mining operations unless an approved substitute water supply plan
or decreed plan for augmentation is first obtained.
® If groundwater is exposed at the site, the applicant will need to obtain either a gravel pit or other type
of well permit, as applicable. However, prior to obtaining a permit, an approved substitute water
supply plan or decreed plan for augmentation is required.
® If water is used at the site, the applicant will need to document that the water was obtained from a
legal source, or the water was diverted in priority under a water right decreed for such
mining/industrial use.
® If stormwater runoff is intercepted by this operation and is not diverted or captured in priority, it must
be released to the stream system within 72 hours; otherwise the operator will need to make
replacements for evaporation.
COMMENTS: The subject application is the sixth amendment to a quarry operation on 361.27 permitted acres,
located near the Town of Morrison. The primary commodities to be mined at the site are construction
materials. The site is proposed to be reclaimed to wildlife habitat and a reservoir that will be conveyed to the
Town of Morrison.
The mining operations described in this amendment consist of two phases. Phase 1 involves the continued
development of the South Quarry along with the development of the West Quarry, with mining occurring from
approximate elevations of 7,360 to 6,790 feet. Phase 2 will complete mining operations and lower the bottom
of the South Quarry to an elevation of 6,195 feet.
The application did not include updated water information and instead referred back to Exhibit G of
Amendment No. 4, submitted November 14th, 1994. Exhibit G of Amendment 4 states "[p]resently, we believe
that ground water inflows requiring dewatering will occur and planning is underway to address State Engineer
requirements such as a well permit, an amended substitute supply plan and water rights issues." This Exhibit
goes on to describe piezometer data, collected in June of 1994, showing a groundwater surface elevation in the
Central Quarry of between 6480 and 6470 feet. Additionally, construction reports for two monitoring holes,
drilled on April 8th, 2002, (permit nos. 249892 and 249883) and located in the Central Quarry show groundwater
surface elevations of 6,386 and 6,355 feet, respectively.
1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 www.colorado gov/water _
John W. Hckentooper, Governor I Robert Randatt, Executive Director I Kevin G. Rein, State Engineer/Director