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,-~ depth, maximum depth, percent wetted perimeter, and average velocity are maintained at 0.10 feet, 0.43 feet, 65%, and 0.46 fps, respectively. The Division of Wildlife recommends 0.75 cfs for April through July and 0.25 cfs for the remainder of the year; these flows should be adequate to protect the fishery in Blue Creek. e TROUBLESOME CREEK The Troublesome Creek instream flow segment has been modified to reflect both water availability issues and well as natural environment issues. The revised segment starts at the confluence with Bergan Creek and goes down 2.1 miles to the confluence with Bear Creek near the town of Kittredge. The Division conducted stream cross section and fishery investigations on 9/21/87 where 1.8 cfs was measured and enough rainbow trout of different size classes were collected to indicate that some natural reproduction of rainbow trout occurs in Troublesome Creek. Brook trout were also collected. The Division recommended flows based on the R2CROSS output applying the three hydraulic criteria in a standard manner. At 1.25 cfs all three criteria are met with the 1.00 fps average velocity criterion driving this flow recommendation. The Division originally recommended 0.75 cfs for the winter months as the flow that met two criteria but water availability studies conducted by CWCB staff indicated that only 0.2 cfs was available for much of the low flow season. This flow, while very low, should provide a minimum level of protection for the over-wintering fishery - nearly 89% of the wetted perimeter is maintained and depths and velocities should be minimally adequate. NORTH TURKEY CREEK e North Turkey Creek drains almost 22 square miles before it joins South Turkey Creek to form Turkey Creek in the US 285 highway corridor southwest of Denver. The Division of Wildlife conducted stream cross section and fishery investigations on 8/10/89 to support an instream flow recommendation to the CWCB. The electrofishing summary indicates that North Turkey Creek supports reproducing populations of both brook trout and cutthroat trout. The R2CROSS output from the stream cross section indicates a common hydraulic characteristic of small streams in that the 1 fps average velocity criterion is never met. With that being the case, the Division's flow recommendation for the summer high flow months seeks to exceed the average depth and wetted perimeter criteria and maintain an average velocity that approaches the criterion. For North Turkey Creek the Division recommends 3 cfs the exceed two criteria and maintain an average velocity of approximately 0.8 fps. For the winter low flow months the Division originally recommended 1.5 cfs to meet two criteria (as is customary), however, water availability analyses conducted by the CWCB staff indicated that only 0.75 cfs was available for the low flow months so the Division was asked to re-evaluate the data. The Division's position upon re-evaluation of the R2CROSS was that this flow was still adequate to protect the fishery in that average depth, maximum depth, average velocity, and percent wetted perimeter are still maintained at 0.15 feet, 0.26 feet, 0.53 fps, and 66%, respectively. The Division's flow recommendation for North Turkey Creek to protect the fishery is 3.00 cfs April through July 15 and 0.75 cfs for the remainder of the year. TURKEY CREEK e