PROJ00187

• Contract/PO #: C153385
• Contractor Name: North Poudre Irrigation Company
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Bill Number: SB 82-87
• Loan Projects - Doc Type: Feasibility Study

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rehabilitation of Fossil Creek Reservoir is between
11,508 and 13,597 acre feet per year from North
Poudre storage rights.

Water quality.

(1) The chemical and physical characteristics for the
water in Fossil Creek Reservoir for the period of
1979 indicate the following ranges of values:

1. Boron .2 - .6 mg!l
2. Chlorides - 10 32 mg!1
3. Sulfates - 240 - 55- mg!l
4~ Specific Corductivity 750 - 1300 micromohor
per centimeter
*5. Total Salts - 460 - 600 mg!l

Similar Characteristics for the Cache La poudre River

1. Boron - Not Done
2. Chlorides - 2.63
3. Sulfates - 12 - 140
4. Specific Conductivity 110-800
*5. Total Salts - 58-494

*Total Salts based on 1979 data only.

We do not have any available data on the percentage
of sodium on the reservoir. Data from the Cache
La Poudre collected by City of Fort Collins at
Prospect Street and the poudre River, approximately
500 yards above the Fossil Creek inlet ditch
headgate, indicates approximately 15 to 35 percent
of sodium.

(2) We do not believe the dissolved minerals have
any adverse effect on soils, water requirements
and crop production. The water stored in Fossil
Creek Reservoir, except for water in the reservoir
as a result of rain or snow or from the natural
drainage of Fossil Creek, is water from the Cache
La Poudre River and treated water from the two sewage
plants. After river water is held in the Fossil
Creek Reservoir it is returned directly to
the Cache La poudre River and mixes with river
water.

(3) Municipal or domestic supplies are not involved.
The primary sources of municipal and industrial
water in this area from water treatment plants
above this stream segment.

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