WSP08177

• File Number: 8240.200.40.J
• Description: Yampa
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 5/1/1997
• Title: Findings of the Sediment Monitoring Program Peer Review Panel and Recommended Work Plan
• Water Supply Pro - Doc Type: Publication

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Specific critical areas within the system that could be affected by the flow modifications and
landuse activities include:

· Spawning habitat at the Razorback Bar near Jensen, UT,

· Channel capacity and overbank flows in the flooded bottomland area between Split
Mountain and Sand Wash,

· Sediment storage and movement through Browns Park, Lodore Canyon, and Rainbow-
Island Park on the Green River,

· Sediment storage in Deerlodge Park on the Yampa River,

· Channel adjustments, sediment storage and cottonwood regeneration in Echo Park,

· Colorado squawfish spawning habitat in the lower Yampa Canyon, at Three Fords West,
and at other sites on the Green River,

· Razorback sucker spawning habitat near the mouth of the Yampa River, at the Razorback
Bar and Escalante reach, and near the mouth of the San Rafael River,

· Low-flow fish passage in the Cross Mountain reach of the Yampa River, and

· Fish passage at Tusher Wash on the Green River.

3. RECOMMENDED STUDY PLAN

This chapter describes the workplan for the sediment monitoring program that was developed
based on recommendations and input from the peer review panel. The peer review panel
strongly believes that the success of the proposed sediment monitoring program is
contingent on a long-term (minimum 10 years) commitment to the data collection and
analysis efforts.

3.1 Goals

The overall goal of the sediment monitoring program is to provide information with which to
evaluate Changes in the magnitude, timing, and caliber of sediment delivery to the Yampa and
Green River systems resulting from water-resource development and land-use changes in the
basin, and their potential effects on the riverine ecosystem, specifically as they relate to recovery
of the endangered fishes.

3.2 Objectives

The sediment monitoring program is designed to meet the following specific objectives to:

· Evaluate the dynamics of sediment movement in the Yampa and Green Rivers by
conducting and analyzing sediment load, induding suspended sediment and bed load, and
bed material samples at key points along the system, and

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Mussetter Engineering, Inc.