PROJ00251

• Contract/PO #: C153375
• Contractor Name: Canon City, City of
• Contract Type: Loan
• Water District: 12
• County: Fremont
• Bill Number: SB 81-439
• Loan Projects - Doc Type: Feasibility Study

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the winter months or when the water is not required for irrigation, the

Fruitland Ditch diverts this water into Sand Creek which flows into the

Arkansas River southeast of the treatment plant. lfuen the settling basins

are cleaned, the water and sediment from these basins now flows into the

Arkansas River via a drainline from the plant.

The State Health Department and Environmental Protection Agency are in the

process of adopting standards that ~ould limit the amount of suspended

solids in waste water discharged in~o the Arkansas River or any of its

tributaries. These standards would apply to the backwash water from filters

and water discharged from the cleaning of the settling basins.

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To comply with the above standards and to enable the recirculation and use

of the water used for backwashing filters and cleaning settling basins it is

proposed that two settling basins be constructed below the treatment plant on a

parcel of property that the City is in the process of acquiring. Exhibit No. 7

shows the location of these proposed basins. The effluent from these basins

will be recycled to the plant as proposed in the following discussion.

The 1973 estimated cost for these backwash settling basins and drain line

from treatment plant as shown in Section 6 is $114,100.

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Proposed Initial Settling Reservoir, Pump Stations and Diversion Structure.

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During certain times of the year when the water entering the plant is extremely

turbid because of spring runoff or heavy rains the present settling basins

are incapable of removing this silt load. This places an undue strain on

the filters and necessitates frequent backwashing. At t.imes of extremely

heavy silt load, the water entering the clear wells may have a level of

turbidity exceeding acceptable limits.

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To alleviate this problem and for other reasons to be discussed later it is

proposed that an initial settling reservoir with a capacity of 36 mg be constructed

below the treatment plant on the same parcel of property that the proposed

backwash settling basins are located. Exhibit No. 7 shows the location of

this proposed initial settling reservoir.

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