7957

• UCREFRP Catalog Number: 7957
• Author: Cranney, J. S.
• Title: Lower Duchesne River Fishery Investigations - 1993 - Draft Report.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

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STIIDY AREA
1993 fisheries investigations on the Duchesne River were conducted
from river mile 34.5 just below the US Hwy 40 bridge in Myton, Utah
downstream to the confluence with the Green River (Figure 1). The
majority of the land in this section is owned by or held in trust
for the Ute Indian Tribe.
Within this 34.5 mile segment the river was subdivided into three
strata (A,B,C) ranging from 5.0 to 20.2 miles in length. Statum A
extends from the confluence with the Green River upstream to RM
5.0. It is characterized by a very low gradient (2.2 ft/mile) and
a predominant silt-sand substrate. Stratum B, extending upstream
from RM 5.0 to the Uinta River confluence at RM 14.3, has a much
steeper gradient (10.8 ft/mile) and a cobble-rubble substrate.
Stratum C extends from the confluence of the Uinta River upstream
to RM 34.5 near Myton and is similar in substrate to Stratum B but
has a steeper gradient (15.5 ft/mile). Both Strata B and C are
characterized by a continuous series of deep pools separated by
shallow, cobble riffles. The river drops 425 feet in elevation
from Myton to its confluence with the Green River (12.3 ft/mile).
River width averages 75 feet thoughout the study section with.
maximum depths in excess of 8 ft. in the deeper pools.
Vegetation along the river corridor consists of extensive fremont
cottonwood (Populus fremontii) groves, sumac (Rhus trilobata),