9615

• UCREFRP Catalog Number: 9615
• Author: Miller, W. J., D. E. Rees and J. A. Ptacek.
• Title: Draft Summary of 2001 Tasks Fryingpan/Roaring Fork Rivers Fishery Study.
• USFW Year: 2001.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

Figure 11. Measurement of dissolved oxygen and water temperature December
2001.

11
1

Stream substrate samples were collected at each site to determine gradations for each size
class of substrate. Trout require clean gravel for adequate replenishment of dissolved
oxygen and to remove waste products. Percentage of each substrate size class can be
used to predict potential emergence (Miller et al. 1998). Additional substrate samples
will be collected in February at the end of the brown trout spawning monitoring and the
beginning of the rainbow trout monitoring.
2001 Results
1

During 2001, the artificial redds were created in October and measurements were
conducted in November (Table 5). Unfortunately, due to a 590 cfs flow spike in mid
November, standpipes in three of the six artificial redds were reinstalled in December
(Figure 12).
1 Draft 2001 Task Summary Report page 22
Miller Ecological Consultants, Inc. December 18, 2001