PROJ00467

• Contract/PO #: C153313
• Contractor Name: Eagle, Town of
• Contract Type: Loan
• Water District: 0
• County: Eagle
• Bill Number: SB 78-69
• Loan Projects - Doc Type: Feasibility Study

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facturer of the filter plant at Eagle recommends against pretreatment

using coagulants. However, the manufacturer's representative that sold

the plant suggests that a trial run be given to chemical floculation

using the existing concrete settling pond as a retention and settling

basin.

It is recommended that for periods of high turbidity in Brush Creek

that a chemical floculation be tried using various chemicals and dosages

for removal of the excessive turbidity. This experiment would take

place over a three to four week period during the spring runoff and

would cost approximately $1,000. The addition of a chemical coagulant

could be done manually at very little expense and if it were successful,

a more elaborate setup could be devised that would work automatically.

Should the addition of chemical floculant prove to be successful, the

existing concrete settling pond would have to be cleaned more frequent-

ly to expell the collected solids.
The present drain in the ~ottom of the concrete settling pond is

approximately l~ feet lower than the drain line to Brush Creek. The

grade on the drain line would have to be reversed and if possible, made

more steep to increase the velocity of the water draining from the

concrete settling pond as it starts to empty.

There is presently five 8" steel pipes spanning the concrete

settling pond. After construction of this concrete settling pond,

the contractor attempted to backfill around the pond as per the speci-

fications and noticed that the sides of the structure started to buckle.

To prevent this from happening, the contractor installed at his own

expense these steel pipe supports to prevent any further buckling.

There is an insufficient amount of reinforcing steel and concrete in

the structure. The structure may also tend to float or buckling of

.

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