WSP07697

• File Number: 8240.200.10.B
• Description: UCRBRIP - Riverine Fish Flow Investigations
• Basin: Colorado Mainstem
• Date: 7/1/2001
• Author: CDOW
• Title: Riverine Fish Flow Investigations 2001
• Water Supply Pro - Doc Type: Publication

1200 1998 1999 2000
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reference flow for 0, 0, and 34 days in 1998, 1999 and 2000. The 93 cfs reference flow was

identified by Anderson (1997) and Modde et al (1998) as a minimum flow needed to avoid

severe habitat degradation in the Yampa River.

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~\" ~~ ~\"~ ~{\t'l, ~~ ~~ ~,,'l, ~"O) ~'l,ro ~'l, ~O) ~"ro ~'l,~ ~~~

Figure 3. Mean daily flow between July I and October 15 at the Mayben gage, Yampa River
for 1998, 1999 and 2000.

Colorado River - I5-Mile Reach

The 15-Mile Reach of the Colorado River is from Palisade, Colorado (RM 185)

downstream to the confluence of the Gunnison River at about RM 170 (Figure 4). A reach

description with hydrographs representing flow records of the Palisade gage was given in last

years' progress report (Anderson and Stewart 2000). The 15-Mile Reach study site

established in 1999 was located from the 32 road bridge, from the boat launch at Com Lake at

RM 177.5 downstream to RM 175.3 (Figure 4). This station is now referred to as the Com

Lake Site. The length of this station was 4.0- km with an average width of 55.2 m at a flow of

1400 cfs. Stream width in last year's report was given as 100 In, but that is nearer the

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