AppendixC

• Basin: Statewide
• Title: SWSI Phase 1 Report - Appendix C
• Date: 11/15/2004
• Author: CWCB
• SWSI - Doc Type: Final Report

Based on historical hydrology, proj ections were made of the frequency at which flows in
excess of 300 cfs would occur as a result of those spilled, and subject to protection under
Colorado instream flow law. The table below shows the historical frequency of base
flows and spills that would be protected.
Instream Flow Rights - Black Canyon National Park and Colorado
Water Conservation Board
Base Flow 300 cfs 26 out of 26 years
Shoulder Flow ~~~ 300 - 1,000 cfs 22 out of 26 years
Low Peak Flow ~~~ 2000 - 5,000 cfs 8 out of 26 years
Medium Peak Flow 5000 - 10,000 cfs 6 out of 26 years
High Peak Flow ~~~ 10,000 + cfs 3 out of 26 years
~'~ Black Canyon federal reserve right
~~~ Colorado Water Conservation Board instream flow right
Pursuant to the agreement, the Colorado Water Conservation Board filed an application
for an instream flow right in December, 2003. Several statements of opposition were
filed. The Colorado Water Conservation Board is working to resolve issues associated
with the statements of opposition. It is very likely that a final decree will be issued in
2004 or 2005. (Reference: Ted Kowalski, personal communication, April 6, 2003)
Recreational In-channel Diversion Application for the Gunnison Basin
On March 29, 2002, the Upper Gunnison Water Conservancy District filed for a
recreational in-channel diversion (RICD) in District Court Water Division No. 4(Case
No. 02-CW38) for a Gunnison River white water course in the Gunnison White Water
Park near the City of Gunnison, which is one-quarter mile in length. The application is
for water rights for specified semi-monthly time periods as provided in the table below.
Water Rights Application for Gunnison White Water Park
Time Period Water Ri~ht (cfs)
May 2-15 570
May 16-31 1,190
June 1-15 1,460
June 16-30 1,500
July 1-15 1,100