PROJ00137

• Contract/PO #: C153467
• Contractor Name: Greeley, City of
• Contract Type: Loan
• Water District: 0
• County: Weld
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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it is jacked through the dam is uncertain. Also, the ability to adequately
seal the existing conduit and any voids which may have developed in the
embankment surrounding the conduit is questionable,

No reduction in long term 0 & M expenditures would be realized by Alternative
No.3. The same 0 & M efforts described for Alternative No; 2 would be
required under this alternative.

4.2 Cost Estimates

The total construction cost of each rehabilitation design alternative for Twin
Lakes Dam is shown in Table V.4 and Figure V.4. Twenty-five percent
contingency was added to the costs for this stage of the design. The costs of
each major design component are also shown in Figure V.4.

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TABLE V.4

Construction Cost Estimates for Rehabilitation Alternatives

Alternative No.

Construction Cost Estimate
with 25% Contingency

$ 450,000
$ 394,000
$ 358,800

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2
3

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4.3 Alternative Selected for Feasibility Design

MKE's recommendation for rehabilitating Twin Lakes Dam is based on providing a
techni cally sound and functi onal desi gn which results in the most improvement
for the initial dollar investment. MKE reconmends Alternative No.1 because
of the substanti al reducti on in long tenn 0 & M it provi des and its hi gh
degree of technical confidence. MKE believes that the remote site and
difficult access warrants the additional initial investment for this long tenn
solution. The major components of this recolllllended design alternative were
sUlllllarized previously in Table V.l. The cost for this solution is given in
Table V.4 and Figure V.4.

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