PROJ00235

• Contract/PO #: C153633
• Contractor Name: Greeley, City of
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Bill Number: HB 91-1006
• Loan Projects - Doc Type: Feasibility Study

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The peak hourly rates are used for sizing distribution works, Over the last five years, the
maximum hourly rate of consumption ranged from a low of 65.9 mgd In 1985, to a high of 89,3
mgd in 1989. The average for the 1985 to 1989 period was 80,6 mgd, or about 380 percent
of the average daily consumption.

WATER RIGHTS

The City of Greeley obtains hs water from a number of sources, The major sources include
the Colorado-Big Thompson Project, direct diversion from the Cache La Poudre River, the Windy
Gap Project, stock ownership in the various Greeley and Loveland irrigation company systems,
and the high mountain reservoirs in the Cache la Poudre River watershed, The Cache la
Poudre reservoirs include Barnes Meadow, Comanche, Hourglass, Peterson Lake, Seaman, and
Twin Lakes.

The water rights for Hourglass Reservoir are shown on Table 4.4. The combined decreed
storage capacity is 1693 acre-feet. It will be noted that the reservoirs basin rank is 1401 for
1541 acre-feet, and 1486 for 152 acre-feet. It has the most senior right of Greeley's high
mountain reservoirs, The reservoir currently operates under restricted conditions.

Hourglass Reservoir is currently restricted to elevation 9363 (31 gage), for a capacity of 1,434
acre-feet. The City's current operation of the dam limits operation at maximum elevation 9362
(30 gage) to a period of 30 to 60 days, and at elevation 9361 (29 gage) for more than 60 days.
The elevation 9362 (30 gage) IImh reduces the reservoir storage to 1,366 acre-feet and the
elevation 9361 (29 gage) to 1,300 acre-feet. These gage height restrictions are necessary to
prevent detrimental saturation of the downstream toe of the dam and undesirable ponding
immediately below the dam between Stations 114 + 00 to 117 + 00.

Current restrictions followed a series of restrictions Inhlated shortly after the rehabilitation work
done in 1966, Significant damage to the left groin area of the dam occurred in August 1985
when runoff from a severe stann ran from the left abutment into the dam in the left groin area,
The resulting deep gully was promptly filled with readily available material.

The Cache la Poudre River Water Commissioner administers the operation of all of Greeley's
high mountain reservoirs, The high mountain reservoirs, like other high mountain reservoirs are
allowed to fill to their limit when in priority, Water is then released to meet downstream uses,
All downstream diversion points are near the mouth of the canyon, Water storage in high

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