Proposed Northern Colorado Water Conservancy District Dedication of Mitigation Releases for Instream Flow Use in the Cache la Poudre River @Northern_Water @CWCB_DNR

Cache la Poudre River. Photo credit: Greg Hobbs

Here’s the notice from the Colorado Water Conservation Board (Rob Viehl):

Proposed Northern Colorado Water Conservancy District Dedication of Mitigation Releases for Instream Flow Use in the Cache la Poudre River (Water Div. 1)

The Colorado Water Conservation Board will be considering a proposal from the Northern Colorado Water Conservancy District (“Northern Water”) for a proposed donation of a contractual interest in “Protected Mitigation Releases,” as defined in section 37-92-102(8), C.R.S. for instream flow use in a segment of the Cache la Poudre River (“Poudre River”). The Board will consider this proposal at its July 18-19, 2018 meeting in Glenwood Springs. The agenda for this Board meeting can be found at:
http://cwcb.state.co.us/public-information/board-meetings-agendas/Pages/July2018NoticeAgenda.aspx

Consideration of this proposal initiates the 120-day period for Board review pursuant to Rule 6b. of the Board’s Rules Concerning the Colorado Instream Flow and Natural Lake Level Program (“ISF Rules”), which became effective on March 2, 2009. No formal Board action will be taken at this time.

Information concerning the ISF Rules and water acquisitions can be found at:
http://cwcb.state.co.us/legal/Documents/Rules/Final%20Adopted%20ISF%20Rules%201-27-2009.pdf

The following information concerning the proposed lease of water is provided pursuant to ISF Rule 6m.(1):
Subject Water Right:

GLADE RESERVOIR
Source: Cache la Poudre River
Decree: 03CW0405
Appropriation Date: 5/2/1980
Adjudication Date: 12/31/1980
Decreed Amount: 220,000 Acre Feet

GLADE RESERVOIR FOREBAY
Source: Cache la Poudre River
Decree: 03CW0405
Appropriation Date: 5/2/1980
Adjudication Date: 12/31/1980
Decreed Amount: 5,400 Acre Feet

Proposed Reaches of Stream:

The reach of stream proposed for use of Northern Water’s Mitigation Release water is the Cache la Poudre River extending downstream from the Poudre River Delivery Pipeline (the point where releases from Glade Reservoir enter the Poudre River) to the Poudre River Intake Diversion. The segment extends from near the mouth of the canyon through the City of Ft. Collins for approximately 13 river miles.

Purpose of the Acquisition:

The water rights proposed to be donated to the CWCB would be up to 14,350 acre-feet per year of water available to Northern in the to-be-constructed Glade Reservoir and Glade Forebay in Larimer County. Based upon discussions with Northern Water and Colorado Parks and Wildlife (“CPW”) regarding the need for and use of the donated water, Staff recommends that the CWCB acquire a contractual interest in the mitigation release water of up to 14,350 acre-feet.

The acquired water would be used to preserve and improve the natural environment in the Poudre River to a reasonable decree by protecting Mitigation Releases up to 18-25 cfs to meet the Mitigation Plan targets and CPW’s recommended flows in the Poudre River. The CWCB shall use the Protected Mitigation Releases to help maintain stream flows in the Cache la Poudre River to preserve and improve the natural environment to a reasonable degree within the Qualifying Stream Reach in amounts up to the target rates of (a) winter flows of up to 55 cfs to preserve, and flows from 55 cfs to 85 cfs to improve, the natural environment to a reasonable degree, and (b) summer flows of up to 85 cfs to preserve, and flows from 85 to 130 cfs to improve, the natural environment to a reasonable degree.

Proposed Season of Use:

The CWCB does not currently hold an ISF water right within this reach of the Poudre River. Colorado Parks and Wildlife (“CPW”) and others have been studying and collecting field data in this segment of the Poudre River for over 10 years. CPW evaluated the studies and data by means including R2CROSS and PHABSIM modeling techniques to develop target flow rates for this section of the Poudre River. CPW’s preliminary target flow recommendations for this stream segment are as follows:

Season of Use: Winter (approx. November-April), Preserve Target Rates: Up to 55 cfs, Improve Target Rates: Between 55 and 85 cfs.
Season of Use: Summer (approx. May-October), Preserve Target Rates: Up to 85 cfs, Improve Target Rates: Between 85 and 130 cfs.

Supporting Data:

Available information concerning the purpose of the acquisition and the degree of preservation of the natural environment, and available scientific data can be found on CWCB water acquisitions web page at: http://cwcb.state.co.us/environment/instream-flow-program/Pages/NISPCacheLaPoudre.aspx

Linda Bassi
Stream and Lake Protection Section
Colorado Water Conservation Board
1313 Sherman Street, Room 721
Denver, CO 80203
linda.bassi@state.co.us
303-866-3441 x3204

Kaylea White
Stream and Lake Protection Section
Colorado Water Conservation Board
1313 Sherman Street, Room 721
Denver, CO 80203
kaylea.white@state.co.us
303-866-3441 x3240

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