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An addition study site was added in 2000 and is known as the Clifton Site. This station is just upstream and a short section of river separates it from the Com Lake station. The new site is from RM 177.7 to 180.4. In this section the river has split flow in two sections of the channel and there is an old diversion structure located at RM 179.7. This structure forms a large backwater upstream along the north shoreline, but small backwaters are not common in this site. The peak flow for the Palisade gage in 1999 was 12,700 cfs on June 10 and in 2000 the peak flow was 13,500 cfs on May 31. The median peak flow for the 10-year Palisade gage history is 13,950 cfs indicating that peaks for these two years were near normal. In 1999 flows during the ascending limb (April and May) of the hydrograph dropped to 435 cfs on April 15 1999 and was the minimum flow for the year. Typicany flows in March are near 2,000 cfs, but in some years flows can drop after April I due to diversions into the Government Highline and Grand Yaney canals. The minimum spring flow in 2000 was 1,110 cfs on April 5th, and this was also lower than the March flows. In the year 2000, flows quickly dropped and flows in June were lower than in 1999 (Figure 5). Summer flows were also below normal in 2000 on the Colorado River in the 15-Mile Reach. As was the case for the Yampa River, the flows in 2000 provided an opportunity to sample the fish population under lower than normal flow conditions. The summer minimum flow in 2000 was 530 cfs compared to 1180 cfs in 1999 (Figure 6). The median minimum flow during summer for the period of record (10 years) is 686 cfs. Osmundson (1995) recommended a minimum flow of810 cfs for the Colorado River in the 15-Mile Reach. Flows were below 810 cfs 0 days in 1999 and 35 days in 2000. 8 I I I I I I I I I I I I I I I I I I I