1313 Sherman Street, Room 718 Denver, CO 80203 TO: Alan Martellaro, Division Engineer Division of Water Resources,Water Division 5 FROM: Robert Viehl, Stream and Lake Protection Section Colorado Water Conservation Board RE: Request for Administration of Instream Flow Water Rights on Hunter Creek DATE: August 12, 2020 On behalf of the Colorado Water Conservation Board, I am requesting administration of the Board’s instream flow (“ISF”) water rights on the following segments of Hunter Creek, in Water District 38, to preserve the natural environment to a reasonable degree. Additional information about the specific ISF reaches is shown below. While we understand that current conditions may result in a futile call, this request from the CWCB may allow the City of Aspen to implement certain agreements with its water users that could provide more water to Hunter Creek. Case No. Upper Terminus Lower Terminus Amount (cfs) Appropriation Date 80CW0061 Hunter Creek Flume and PL confl Roaring Fork River 15 (1/1 - 12/31) 06/10/1886 80CW0062 Red Mountain Ditch headgate confl Roaring Fork River 0.5 (1/1 - 12/31) 05/15/1884 80CW0018 historic return flow point confl Roaring Fork River 0.23 (5/15 - 9/15) 08/04/1946 80CW0018 hdgt McFarlane Ditch historic return flow point 15.3 (5/15 - 9/15) 08/04/1946 80CW0018 historic return flow point confl Roaring Fork River 0.06 (5/15 - 9/15) 08/05/1950 80CW0018 historic return flow point confl Roaring Fork River 0.1 (5/15 - 9/15) 08/05/1950 80CW0018 hdgt Evans Ditch #2 historic return flow point 4 (5/15 - 9/15) 08/05/1950 80CW0018 hdgt Evans Ditch #1 historic return flow point 7.05 (5/15 - 9/15) 08/05/1950 80CW0018 outlet Hunter Creek Res confl Roaring Fork River 0.018 (5/15 - 9/15) 10/07/1957 80CW0018 historic return flow point confl Roaring Fork River 0.037 (5/15 - 9/15) 10/13/1957 80CW0018 historic return flow point confl Roaring Fork River 0.005 (1/1 - 12/31) 10/30/1957 80CW0018 McFarlane Springs historic return flow point 9.46 (5/15 - 9/15) 10/13/1957 80CW0018 hdgt Koch Ditch #1 historic return flow point 1 (5/15 - 9/15) 10/07/1957 80CW0018 hdgt Bulloch Spring & PL historic return flow point 0.04 (1/1 - 12/31) 10/30/1957 80CW0018 historic return flow point confl Roaring Fork River 09/15/1967 80CW0018 hdgt Koch Ditch #3 Ext historic return flow point 1 (5/15 - 9/15) 09/15/1967 75W2656 confl No Name Creek confl Roaring Fork River 14 (1/1 - 12/31) 02/26/1975 75W2654 confl Midway Creek confl No Name Creek 11 (1/1 - 12/31) 02/26/1975 75W2652 hdgt Fry-Ark Project div confl Midway Creek 8.5 (1/1 - 12/31) 02/26/1975 P 303.866.3441 0.018 (1/1 - 12/31) F 303.866.4474 www.cwcb.state.co.us Jared Polis, Governor Dan Gibbs, DNR Director Rebecca Mitchell, CWCB Director 79CW0190 confl No Name Creek confl Roaring Fork River 16 (1/1 - 12/31) 01/31/1979 79CW0188 confl Midway Creek confl No Name Creek 6 (1/1 - 12/31) 01/31/1979 79CW0186 hdgt Fry-Ark Project div confl Midway Creek 3.5 (1/1 - 12/31) 01/31/1979 The HUNTER CREEK NEAR ASPEN gage is located in the ISF reach and demonstrates that flow conditions are below the decreed ISF water right. The Board is requesting administration to ensure that water up to the full decreed amount of these water rights is made available based on the priority system. The effective date of this call is August 12, 2020 and the call is to be in effect until the end of the current irrigation year. Signed: Robert Viehl Water Resource Specialist Stream and Lake Protection Section (303) 866-3441 x3237 CC: Bill Blakeslee, District 38 Water Commissioner