2015-10-30_HYDROLOGY - M1982147

• Permit No: M1982147
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/30/2015
• Doc Name: Amendment to permit
• From: DNR Water Resources
• To: DRMS
• Email Name: TOD
• Media Type: D
• Archive: No

DEPARTMENT OF NATURAL RESOURCES
DIVISIO\ OF WATER RESOURCES
October 21, 2015
Thomas A. Williamsen, P.E.
Helton Et Williamsen, P.C.
Consulting Engineers in Water Resources
384 Inverness Parkway, Suite 144
Englewood, CO 80112-5822
John 1V. Hickenlooper
Governor
Mike King
Executive Director
Dick Wolfe, P.E
Director/State Engineer
RE: Substitute Water Supply Plan, Nyholt-Mann Lake,
DRMS File No. M-82-147
NE 1/4 of Section 34 and SE 1/4 of Section 27 all in T1S, R67W, 6th P.M.
Water Division 1, Water District 2, Adams County
Approval period: November 1, 2015 through October 31, 2016
Contact phone number for Thomas A. Williamsen: 303-792-2161
Contact phone number for Kurt Carlson (Adams County Regional Park Manager): 303-637-8013
Dear Mr. Williamsen:
This letter is in response to your application dated September 24, 2015 submitted on behalf of
Adams County Regional Park (Adams County or Applicant) requesting a substitute water supply
plan ("SWSP") for the Nyholt-Mann Lake currently permitted under the Division of Reclamation
Mining and Safety (DRMS File No. M-82-147). This plan was submitted pursuant to §37-90-
137(11), C.R.S. The fee of $1,593 for the SWSP has been received (receipt no. 3671691).
Plan Operation
The Nyholt-Mann Lake is located at the Adams County Regional Park in the NE1 /4 of Section 34
and 5E1/4 of Section 27 all in T1S, R67W, 6th P.M. A plan for augmentation was decreed for
replacement of evaporation in Division 1 Water Court Case no. 05CW146. The site consists of 3
lined storage reservoirs (Mann Lakes, WDID 0203911) and one unlined reservoir (Nyholt-Mann Lake
Pit, WDID 0210294), as shown on attached Figure 1. Mann Lakes has passed the seepage loss tests
and the inlet and outlet works will be installed in the near future. Until such time as Mann Lakes
are operational, the Applicant cannot operate under the decreed augmentation plan. Therefore,
the Applicant is seeking this SWSP to replace depletions from Nyholt-Mann Lake until such time as
they can begin operation under the decreed augmentation plan.
Nyholt-Mann Lake was created by sand and gravel mining operations and all mining operations at
the site have ceased. This SWSP seeks to replace the evaporation depletions from Nyholt-Mann
Lake using water leased from the City of Aurora (Aurora).
Water flows into the Nyholt-Mann Lake from Brantner Gulch. The Applicant must release all
out -of -priority storage in the Nyholt-Mann Lake within 72 hours or augment such out -of -
priority storage under a separate SWSP or court approved augmentation plan. In order to
assure that water is not being stored out -of -priority the Applicant must install measuring and
recording devices as required by the division engineer and water commissioner to measure
the amount of water flowing into and out of Nyholt-Mann Lake. The Applicant must consult
Office of the State Engineer
1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: [phone] • Fax: [phone]
www.water.state.co.us