WSP05745

• File Number: 8240.200.43.A.2
• Description: Grand Valley/Orchard Mesa
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 2/1/1999
• Title: Evaluation of Fish Passage at the Grand Valley Irrigation Company Diversion Dam on the Colorado River Near Palisade, CO - Draft Report
• Water Supply Pro - Doc Type: Publication

COLORADO RIVER RECOVERY PROGRAM
FY -1999 PROPOSED SCOPE OF WORK

Project No.: CAP-17

Lead Agency:

Fish and Wildlife Service
Colorado River Fishery Project

Frank Pfeifer, Project Leader
Bob D. Burdick, Fishery Biologist

764 Horizon Drive, South Annex A
Grand Junction, CO 81506
[phone]
[phone]
R6FFA [e-mail]

Submitted by:

Address:

Phone:
FAX:
E-Mail:

Date:

7 October 1998

Cateqorv:
XX Ongoing project
___ Ongoing-revised project
___ Requested new project
___ Unsolicited proposal

I. Title of Proposal: Evaluation of Fish Passage at the Grand
Valley Irrigation Company (GVIC) Diversion on the Upper Colorado River
near Palisade, Colorado

Exoected Fundinq Source:
Annual funds
XX Capital funds
___ Other (explain)

Note: This SOW was originally developed and written for three years.
The first two years (FY98 and FY99) were planned for field collections
and FY2000 for preparing the final report. The Management Committee
decided in August 1998 to postpone all field work previously scheduled
for the spring, summer, and fall of 1999 (March through September) for
this project. The only field work scheduled for FY99 will be during
October 1998 (Task 4). Therefore, analyses of the field data and
preparation of the final report will be in FY99 instead of FY2000.

II. Relationship to RIPRAP: Colorado Riyer Action Plan: Colorado River;
II.B.l.a.(5). Restore native fish passage at instream barriers:
Restore passage at Grand Valley Irrigation Co. Diversion Dam
(Palisade): Monitor and evaluate success.

III. Study Background/Rationale and Hypotheses

Blockage of Colorado squawfish movement by dams and water diversion
structures has been suggested as an important cause of the decline of
this species in the Upper Colorado River Basin (Tyus 1984; Burdick and
Kaeding 1990). Although the actual role that blockage might have
contributed in the decline of these species in the upper basin is
unknown, providing fish passage past instream barriers has come to be
considered an important means to aid the recovery of this species.

The GVIC Diversion is located on the Upper Colorado River 15 miles
upstream of the confluence with the Gunnison River near Palisade,