ArkansasComments09

• Basin: Arkansas
• Title: Comments 9
• Date: 10/24/2003
• SWSI - Doc Type: Comments

Problem Identified: L Low flow temperatures are high enough to stress fish and
chronic and even acute impacts occur.
2. fuadequate flows do not provide necessary physical habitat for
fish.
3. Whirling disease

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Minimum Flow:

Optimum Flows:

Other Info:

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125 cfs (year-round)**

200 cfs (year round)**

Basis: Barry Nehring's CDOW F-51 (7/88) report recommends a
125 cfs minimum and 200 cfs optimum flow for juvenile and adult
brown trout at Hot Sulphur Springs.

Nehring also recommends rainbow trout optimum flows at Hot
Sulphur Springs as follows: 4/20-6/15 300 cfs; 6/15-7/15 125 cfs;
7/15-10/15 175 cfs; 200 cfs year-round for adults. This may be
useful relative to Whirling disease. Temperature in this stretch is a
serious issue.

In June of 200 1, George Stark took a temperature reading of 80
degrees at lOAM. There were dead fish on the banks.

Stream Reach:

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Fraser River below Vasquez Creek

Problem Identified: 1. Inadequate flows do not provide necessary physical habitat for
fish.

Minimum Flow:

Optimum Flow:

Other Info:

8-10 cfs (year-round)*
Basis: Denver Water's Systemwide Environmental Impact
Statement. I'm not clear on the rationale, but think the 8 cfs is
based on IFIM. Current CWCB ISF is 8 cfs (5/15 - 9/15) and 3.5
cfs (9/16 - 5/14).

11 cfs
Basis: Denver Water's Systemwide Environmental Impact
Statement which suggested directing 3 cfs from Williams Fork
during fall!winter to bring flows up to 11 cfs (29 cfs at Granby
gage).

The SEIS also recommended livestock fencing along the Fraser
between Fraser and Tabernash as aquatic life mitigation.

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