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Instream Flows <br />In Water Court Case No. W7636 an instream flow decree was awarded to the Colorado Water <br />Conservation Board (CWCB) for 15.0 cfs for a reach of Boulder Creek extending from the <br />discharge point of the Boulder Canyon Hydroelectric Plant on Main Boulder Creek to the outfall <br />of the City's wastewater treatment plant at 75th Street. This water right has an appropriation date <br />of 12/31/1973. <br />A management objective of the City is to maintain flows in Main Boulder Creek within the reach <br />defined in Case No. W7636 and the tributaries of Boulder Creek. Boulder works cooperatively <br />with the CWCB to accomplish this objective. As discussed above, the City's change of municipal <br />water rights derived from prior changes of water rights in several irrigation ditches in Case No. <br />90CW 193 resulted in the City conveying water to the CWCB that can be used for instream flow <br />purposes in North Boulder and Main Boulder Creeks. Since its purchase of Barker Reservoir and <br />as part of its developing management plan for the Barker system, the City is also working with <br />CWCB to restore instream flows in Middle Boulder Creek between Barker Dam and Orodell. <br />COMMENTS AND CONCERNS <br />None. <br />Where to find more information <br />^ Procedures for determining key diversion structures and a list of all key diversion structures <br />selected is presented in SPDSS Task 3 -Identify Key Diversion Structures Overall <br />Task Memorandum. <br />^ Procedures for determining key reservoirs and reservoir systems and a list of all key <br />reservoirs and reservoir systems structures selected is presented in SPDSS Task 5 - <br />Identify Key Storage Elements Overall Task Memorandum. <br />^ Additional information on ditch and reservoir operations within the Water District is <br />presented in the SPDSS Task 3 -Water District 6 Meeting Notes. <br />^ Additional information on NCWCD, Carter Lake, St. Vrain Supply Canal, and C-BT <br />operations within the Water District is presented in SPDSS Task 5-Northern Colorado <br />REFERENCES <br />1) Interview with Ms. Carol Ellinghouse, City of Boulder Water Resources Coordinator. <br />2) City of Boulder Raw Water Mater Plan, 1988. Prepared for the City of Boulder by <br />WBLA, Inc. <br />City of Boulder Memo.Doc Page 26 of 30 March 9, 2005 <br />