9473

• UCREFRP Catalog Number: 9473
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flows Investigations.
• USFW Year: 2001.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

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.

1200
1000
800
~ 600
(,)
400
200
0
~\~

1998

1999

2000

~ ~ ~ \~<t, ~ ~fl, ~ ~ ~<t, ~~fl, ~~OJ ~fl,ro ~fl, ~OJ ~~ro ~~ ~~~

Figure 3. Mean daily flow between July 1 and October 15 at the Maybell gage, Yampa River
for 1998, 1999 and 2000. .

Colorado River - IS-Mile Reach

The IS-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 hydro graphs representing flow records of the Palisade gage was given in last

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

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

RM 177.5 downstream to RM 17S.3 (Figure 4). This station is now referred to as the Corn

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 m, but that is nearer the

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