9457

• UCREFRP Catalog Number: 9457
• Author: Ptacek, J. A., D. E. Rees and W. J. Miller.
• Title: A Study of the Ecological Processes on the Fryingpan and Roaring Fork Rivers Related to Operation of Ruedi Reservoir.
• USFW Year: 2003.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

media and pumped into the spike for 15 minutes to allow the substrate surrounding the
spike to freeze to it (Figure 16). Once frozen, the spike and attached substrate were
pulled from the streambed and placed in a bucket to thaw. Substrate gradations were
performed by Earth Engineering Consultants, Inc of Fort Collins, Colorado.
Rainbow trout artificial redds were constructed on 5 March 2002 at both Pruessing
Property and Palm Property sites. Locations of rainbow trout artificial redds were in the
same general location (20 m2) as brown trout redds. Sampling methodology followed
those outlined from brown trout artificial redds. Rainbow trout were observed actively
spawning within 2 in of artificial redds at each site. Freeze cores were collected on 27
June 2002.
Figure 16. Freeze core sampler setup.
Draft Final Report, Fryingpan and Roaring Fork Rivers February 12, 2003
Miller Ecological Consultants, Inc. Page 22