PROJ00400

• Contract/PO #: C153588
• Contractor Name: Greeley, City of
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Bill Number: SB 89-85
• Loan Projects - Doc Type: Feasibility Study

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TABLE IV.3

Average Monthly Demand Pattern for the Period 1982-1986

Month

Percent of Annual Demand

January
February
March
April
May
June
July
August
September
October
November
December

5
5
5
8
10
12
15
14
10
6
5
5

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The historical and projected maximum day demands within the City of Greeley
water servi ce area are shown on Table IV. 4 for the peri od from 1971 to 2015.
The table also displays the precipitation which occurred during the April 1 to
September 30 irrigation season. For the historical period, the maximum day
demand averaged 39.5 mgd, and the i rri gati on season preci pitati on averaged
9.91 inches. The 1986 maximum day use was 41.8 mgd, but the 1 argest daily
demand on record was the 47.4 mgd which occurred in 1980.

Maximum day demands are important because water treatment facilities are
designed based on their capacity to produce treated water. The projected
values from 1990 to 2015 were calculated by multiplying the projected average
annual daily demand by a peaki ng factor of 2.4. Thi s is the average peaki ng
factor over the last 16 years for the City of Greeley water system. The
maximum daily demand projected for the year 2015 is 83.0 mgd.

The peak hourly rates are important as the basi s for si zi ng di stributi on
works. Over the 1 ast fi ve years, the maximum hourly rate of consumpti on
ranged from a low of 65.9 mgd in 1985, to a hi gh of 77.9 mgd in 1984. The
average for the 1982 to 1986 period was 72.1 mgd, or about 380 percent of the
average daily consumption.

1231 H

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