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<br />Prepared by: Bolton & Menk, Inc. ESTIMATED COSTS
<br />2026 PMP Street & Utility Improvements ǀ 25X.137753 Page 17
<br />VII. ESTIMATED COSTS
<br />Detailed estimates of probable construction costs have been prepared for the improvements
<br />described in this report and are included in Appendix B. All costs are based on anticipated unit
<br />prices for the 2026 construction season based on actual bid prices for similar projects. Actual costs
<br />will be determined through competitive bids following the final design for the project. All
<br />estimated costs also include a 10% contingency and 27% overhead allowance for legal,
<br />engineering, administrative, and finance costs. Table 2 below contains a summary of the
<br />estimated total project costs for the recommended base project improvements, inclusive of
<br />construction costs, contingency, and overhead allowance.
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<br />One design alternate was evaluated as part of the preliminary design for the potential removal of
<br />accumulated sediment at five delta locations in Karth Lake. Also, three options were evaluated for
<br />improvements to the Karth Lake pump system to better monitor the lake level and possibly
<br />automate the pump operations. A summary of the estimated project costs associated with the
<br />design alternate and the estimated project costs associated with the three design options is
<br />presented in Table 3 below (includes 10% contingency and 27% overhead).
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<br />Table 3 – Estimated Alternate Project Costs
<br />Proposed Improvements Karth Lake Total Construction Costs
<br />Alternate 1 - Karth Lake
<br />Sediment Removal $575,000 $575,000
<br />Option 1 – Karth Lake Pump
<br />System Improvements $14,000 $14,000
<br />Option 2 – Karth Lake Pump
<br />System Improvements $112,000 $112,000
<br />Option 3 – Karth Lake Pump
<br />System Improvements $500,000+ $500,000+
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<br />It is planned to bid the project with a bid alternate for the Karth Lake dredging work and the Karth
<br />Lake pump system improvements, if approved. This will allow flexibility to include or remove these
<br />work items from the project based on the actual prices bid by the contractor to complete the
<br />work.
<br />Table 2 – Estimated Base Project Costs
<br />Proposed
<br />Improvements
<br />Residential
<br />Mill &
<br />Overlay
<br />Areas
<br />Residential
<br />Reclamation
<br />Areas
<br />Industrial
<br />Reclamation
<br />Areas
<br />Trails &
<br />Retaining
<br />Wall Karth Lake
<br />Total
<br />Project
<br />Costs
<br />Streets $163,000 $1,229,000 $401,000 - - $1,793,000
<br />Storm Sewer $55,000 $148,000 $13,000 - - $216,000
<br />Sanitary Sewer $23,000 $152,000 $11,000 - - $186,000
<br />Watermain $49,000 $344,000 $74,000 - - $467,000
<br />Trails - - - $248,000 - $248,000
<br />Karth Lake - - - - $179,000 $179,000
<br />Total Project
<br />Costs
<br />$290,000 $1,873,000 $499,000 $248,000 $179,000 $3,089,000
<br />DRAFT
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