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

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2000 Yampa River, Lily Park

A semi-permanent base pin was established at Lily Park so that additional data can be

collected using the same reference location. Bathymetric data was collected along a 2.8km

section of the Yampa River at Lily Park on June 12, 13 and 14,2000, using the GPS/sonar

technique. Collection of bathymetric data was hampered in 2000 by the low and unusually

short runoff period. A wide and shallow riffle near mid station could not be surveyed by boat

and had to be surveyed at a later time by logging points while walking. The shallow riffle was

surveyed on August 8 and 9 and again on October 19 and 20.

2000 Colorado River, Clifton study site

A new study site was established in the IS-Mile Reach of the Colorado River, known

as the Clifton station. A 4.2S kilometer stretch of the between river miles 177.7 and 180.4

was surveyed on May 31, June 1,2,4 and 5, 2000. This site is just upstream of the site

surveyed in 1999, which is now called the Com Lake station (last year it was named the 15-

Mile Reach station). A total of 4S,000 usable bathymetric survey points were collected at the

Clifton station using the boat GPS/sonar equipment.

Aerial photography of the ISMile reach of the Colorado River has been digitized by

Mesa County Survey System and was purchased from them to aid in identification of

landmarks and waterline boundaries. We accomplished this by using the latitude and

longitude brass marker at the intersection of31 and C Road for a reference pin for our survey.

Therefore both the Com Lake and Clifton survey can have associated photography.

Waterline shots were made on August 1,2 and 3 and another set on Jan 23,24, 2S and

26, 2001.

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