WSP00416

• File Number: 8240.200.10.B
• Description: UCRBRIP Annual Report
• Basin: Colorado Mainstem
• Date: 12/22/1997
• Author: UCRBRIP
• Title: 1997 Annual Reports Package Part 1
• Water Supply Pro - Doc Type: Publication

monitoring was accomplished on several Colorado squawfish
implanted above Yampa Canyon, but only two humpback chub in
Yampa Canyon. Extremely high base flows prevented the
collection of Colorado squawfish in Yampa Canyon and may
have contributed the low success in finding radio
transmitter implanted humpback chub in the canyon. The
stream profile component of the study included collection of
data from 35 sites (21 above and 14 below the canyon).
Despite the rare high flows during the months of August
through October, all but two sites above the canyon and all
but five sites in the canyon were surveyed (two stream
profile sites in the canyon were surveyed using both the R2
cross and HEC 2 methodology as a check on model
predictions) .

Two stationary telemetry data logging .stations were
established approximately 0.5 miles upstream of Cross
Mountain Canyon and immediately above the Maybell Diversion
on June 30 and July 4, respectively, to evaluate
postspawning passage barriers. Three fish were observed to
move downstream of the Maybell station in July and four fish
were monitored passing upstream of the station in August.
The same four fish were detected at the Cross mountain
station (four fish moving downstream in July and all
returning between July 31 and August 5). Fish did not
appear to be impeded during their postspawning migration,
however, the high flows observed in summer of 1997 precluded
the opportunity to detect migrational obstacles if they
occur.

Shortcomings of 1997 included the shortage of telemetry data
on Colorado squawfish and humpback chub in the canyon.
Despite using external antennas, humpback chub were
difficult to locate in Yampa Canyon during the baseflow
period. The rare magnitude of base flows (ranging between
1,000 and 7,000 cfs) adversely affected telemetry data
collection in Yampa Canyon. Habitat use information
collected previously from humpback will be used to
supplement habitat use information obtained. The additional
fish implanted with radio transmitters above the canyon and
reliable access allowed the collection of good daily
movement information for Colorado squawfish above Maybell,
Colorado.

VII. Recommendations: Data collection is completed and the
analysis should proceed as scheduled.

VIII.Project Status: Ongoing and on-track.

IX. FY 97 Budget

a.
b.
C.

Funds provided:
Funds Expended:
Differences: $0

$133,540 by CRFP and 85,100 by CDOW.
$218,640

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