8178

• UCREFRP Catalog Number: 8178
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flow Investigations.
• USFW Year: 1999.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

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Table A2.2. Mean number of invertebrates collected from six surber samples at the
Sevens Ranch in July, August, September and October 1998. ............,..,......."...35

Table A2,3. Mean number of invertebrates collected from six surber samples
Duffy surveyed site in July, August, September and October 1998.....................36

LIST OF FIGURES

Figure 1. Location of the Sevens and Duffy sampling sites on the Yampa River..................3

Figure 2. Mean daily flows from the Maybell gauge during the sampling period, July to

October 1998 ...................................................................................................... 4

Figure 3. Percent wetted area for depths at a flow of 200 cfs for the Duffy and Sevens study

sites. . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . ., 18

Figure Al.l Percent composition of native fish at seven sampling sites on the Yampa River.
Sevens and Duffy are from this study and the other sites are from unpublished

IS1\1P data. ......................................................................................................... 30

Figure A1.2 Percent composition of flannel mouth, bluehead and WSWX (white sucker and
crosses) at seven sites on the Yampa River. Sevens and Duffy are from this study
and the other sites are from unpublished ISMP data. .......................................... 30

Figure Al.3 Percent composition of predator species (CC, CPM, NP & 5MB) at seven sites on
the Yampa River. Sevens and Duffy are from this study and the other sites are
from unpublished IS1\1P data. ............................................................................. 31

Figure A3.1 Elevations at the Duffy surveyed site.................................................................. 40

Figure A3.2 Elevations at the Sevens surveyed site... ............................... ............. ............ .....41

Figure A3.3 Percent surface area with depths less than 3.5 feet at the Duffy and Sevens study
sites at flows of 50, 100, 150,200 and 600 cfs. ..................................................42

Figure A3.4 Percent surface area with depths less than 0.5 feet at the Duffy and Sevens study
sites at flows of 50, 100, 150,200 and 600 cfs. ..................................................42

Figure A3.5 Percent surface area at depths between 0.5 and 2.5 feet at the Duffy and Sevens
study sites at flows of 50, 100, 150,200 and 600 cfs. . .......................................43

Figure A3.6 Percent surface area,at depths between 2.5 and 3.5 feet atthe Duffy and Sevens
study sites at flows of 50, 100, 150,200 and 600 cfs. . .......................................43

Figure A3.7 Percent surface area at depths between 3.5 and 5.5 feet at the Duffy and Sevens
study sites at flows of 50, 100, 150,200 and 600 cfs. . .......................................44

Figure A3.8 Percent surface area at depths over 5.5 feet at the Duffy and Sevens study sites at
flows of 50, 100, 150,200 and 600 cfs. . ............................................................44

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