WSP02745

• File Number: 8220.100.40
• Description: CRSP
• Basin: Colorado Mainstem
• Date: 6/30/1984
• Author: USDOI
• Title: 28th Annual Report on the Statuts of the Colorado River Storage Project
• Water Supply Pro - Doc Type: Annual Report

Construction

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Dallas Creek spillway Intake structure

The major construction activities of the
Upper Colorado Regional Office in Fiscal
Year 1984 included the Glen Canyon Spill-
way Repair on the Glen Canyon Storage
Unit: the Upper Stillwater Dam and other
features of the Strawberry Aqueduct and
Collection System oj the Bonneville Unit,
Central Utah Project: McPhee Dam of the
Dolores and Ridgway Dam of the Dallas
Creek Projects: Installation of air slots in
the spillways of the Flaming Gorge Storage
Unit and Blue Mesa Dam of the Wayne N,
Aspinall Storage Unit.

Construction or rehabilitation was also in
progress on Navajo Unit: Central Utall
Project's Bonneville, Vernal and Jensen
Units: Dolores Project Dallas Creek Project:
Colorado River Basin Salinity Control Pro-
ject Seedskadee Project and the Lyman
Project

Glen Canyon Storage Unit: Repair of the
damaged spillways of Glen Canyon Dam
was completed during 1984 and the left
spillway was tested during August 11-15, By
releaSing 50,000 cubic feet per second
(cts) through the previously damaged spill-
way and by sending 20,000 cfs through for

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New lining of Glen Canyon Dam"s left spillway tunnel

two 24-hour periods, Reclamation tested the
strength of the repair work, and the value
of the newly added air slots which were
designed to eliminate cavitation, the cause
of the damage, Without qualification, the
repair work and air slots were successful.
By the end ot September 1984, all of the
work In the right spillway had been com-
pleted and only clean-up work remained
to be accomplished,
Navajo Storage Unit: An extensive program
ot investigations of toundation conditions
at Navajo Dam related to seepage through
the abutments has been completed, Pre-
liminary designs have been prepared which
call for drilling tunnels into both the right
and left abutments of Navajo Dam and
constructing a drainage system to remove
water seeping through the abutments from
the contact with the dam foundation, In
addition to these plans, which have been
reviewed by outSide consultants, studies
ot positive seepage cutoff walls in the
abutments of Navajo Dam are also under-
way,
Flaming Gorge Storage Unit: Work was
accepted as substantially complete on the
airs lot installment in the spillway tunnel at

StraVYberry Tunnel Inlet Rehabilitation

Flaming Gorge Dam, Another contract for
$437,000 was awarded for spillway tunnel
repairs, Portions of the 1 \/,-foot-thick
concrete lining will be removed and re-
placed with new concrete, At certain desig-
nated places, the existing concrete will be
repaired, By the end of August 1984, four
percent of the work had been accom-
plished
Wayne N. Aspinall Storage Unit: A
$542,260 contract was awarded to modify
and repair Blue Mesa Spillway, Damaged
portions of the concrete lining will be re-
paired and an air slot will be installed which
will prevent future damage to the spillway
when in operation, Anticipated completion
date is May 1985,
Seedskadee Project: A request for pro-
posals was published for the Fontenelle
Dam test section, The work of the test sec-
tion involves approximately 700 linear feet
of concrete diaphragm wall to be installed
through existing embankment and rock
abutment foundations in three sections at
Fonfenelle Dam, The wall will extend a
maximum of approximately 70 feet into the
foundation abutment rock foundations,
After construction techniques used in the

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