PUB00016

• Year: 1994
• Title: Small Dam Site Reconnaissance Study - East Lake Creek Dam and Reservoir
• CWCB Section: Finance
• Author: Harris Water Engineering, Inc.
• Description: Identify and evaluate dam sites at a recon leval, dam sites to fill a need for raw water storage
• Publications - Doc Type: Tech Report

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GRANBY DAM AND RESERVOIR .12

PLAN DESCRIPTION

Granby Dam and Reservoir #12 is an existing reservoir located in
the Dirty George Creek drainage of the Gunnison River basin about
12 miles north of the Town of Cedaredge. The reservoir is in the
Grand Mesa National Forest. Figure 1 is a location map showing the
reservoir within Colorado and relative to the Town of Cedaredge.
Figure 2 is a copy of a USGS Quad map showing the reservoir site.

The dam and reservoir are owned by the Granby Ditch and Reservoir
Company. The contact person is listed below.

Ernie Buchhein, Board Member
Granby Ditch and Reservoir Company
1781 2075 Drive
Cedaredge, Colorado 81413
303-856-3932

The dam was constructed in the early part of the century with a
height of about 25 feet. When full, the reservoir has a capacity
of about 750 acre-feet at gage height 22; the reservoir has been
restricted to gage height 17, about 523 acre-feet, since the early
1980's.

The restriction was imposed because of a small slide at the toe of
the embankment northeast of the outlet pipe. The dam safety
engineer estimates that the slide may have been a foundation
failure at the toe. Apparently when the dam was built, the surface
material was not stripped prior to placing the embankment, which
over the years became saturated and slipped. The repair work would
either involve installation of a toe drain or addition of material
on the toe for stability.

The primary construction problem is that the reservoir is located
in the Grand Mesa National Forest and the local Forest office has
not allowed improvement to the access road for construction
equipment. The present road is extremely rough and almost
inaccessible. No outside materials, such as sand for a toe drain,
could be hauled to the dam under present conditions.

Granby Reservoir is adjacent to Big Battlement Reservoir, owned by
the city of Delta, see Figure 2. Big Battlement, as explained in
the report for that dam, is in need of reconstruction. Due to the
access difficulty, the work for Granby #12 is predicated on the
construction work at both reservoirs being performed jointly. One
engineer and one contractor are assumed to perform the work at both
sites, and any other repairs that may be needed at other dams in
the area.

Granby ltl2 Dam

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