Request for Proposal Platte River Channel Dynamics Study

• Description: Draft Final
• Date: 2/5/2001
• Water Supply Pro - Doc Type: Report/Study

Exhibit B
Work Tasks
Task 1. Collection, Evaluation, and Summary of Existing Information
The Consultant will identify, gather, evaluate, and summarize existing data,
studies, and other information relative to the issues of channel narrowing or
deepening, sediment transport, and vegetative encroachment in and along the
central Platte River for both existing flow conditions and for flow conditions
possible in the Proposed Program (Although the investigation is intended to
address these issues as they relate to the central Platte River, it is recognized that
such an investigation must consider potential causes and effects that may lie
upstream, within, and below this reach). Evaluation should include information
both considered and not considered by the EIS Team and the FWS in their
NEPA/ESA review of the Program. Evaluation should identify the reliability of
the information, ways the information could/should be used, and ways the
information should not be used. In the proposal, the Consultant should provide a
preliminary list of existing data, studies, and other information deemed pertinent
to this work.
Task 2. Review of Current EIS/FWIR oducts
The Consultant will perform a detailed critical review of the current EIS products.
The current EIS products are as follows:
1. Simons and Associates, 2000. Physical History of the Platte River
in Nebraska: Focusing Upon Flow, Sediment Transport,
Geomorphology, and Vegetation. 100p.
2. Peter Murphy & Tim Randle, draft, 2001. White Paper on
Channel Stability Issues Relating to the Central Platte (working
title). 30p.
3. Fortran Computer Model: SEDVEG. 8,000 lines
4. Technical Report: PLATTE RIVER SEDIMENT TRANSPORT
AND RIPARIAN VEGETATION MODEL. 30p. plus appendices.
5. Options for Offsetting Channel Degradation and Restoring
Channel Habitat (working title). EIS Team. Expected March 30,
2001.
6. Description of Proposed Program's Insufficiences in Serving as an
RPA for Water Related Actions in the Platte River Basin. FWS.
Expected March 1, 2001
These products generally concern issues relative to channel width trends; causes
of channel narrowing /degradation and vegetative encroachment; sediment supply
and transport; "dynamic equilibrium "; and effects of water diversion and supply.
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