CCP 11-30-1998 - Laserfiche WebLink

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. It.!::: . AT-rMtJ e Mr. Brian Fritsinger November 20,1998 Page 2 . include additional signage for Alternative B ($13,900.00) and additional mobilization costs ($20,800.00 base upon 5% of project costs). The estimated storm sewer costs for Alternative B are approximately $52,000.00 greater than those estimated for Alternative D. The difference is a result of longer pipe lengths for each series of catch basins and approximately 14 extra catchbasins for median drainage. The current storm sewer cost estimate for Alternative B is greater than the estimate included in the feasibility report by approximately $52,000.00. This increase was made to reflect additional structures and connections to existing business driveways along the route. Both alternatives will need to provide catchbasins and storm sewer connections to the existing properties. This work was included as a result of the refinement of the roadway design. Alternative B would require the acquisition of a 6 foot wide strip along the existing private properties to provide for a minimum of 6 feet of right of way adjacent to the eastern curb line. Both alternatives include the purchase of a 15 foot wide permanent trail and utility easement along the eastern side of the roadway for sidewalk, snow storage and private utility placement. Detailed construction cost estimates are attached for your review. Cost Per Foot Comparison . Recent residential street reconstruction projects within the City have cost approximately $200 per foot of roadway. The proposed improvements for West Round Lake Road Phase 2 are estimated to cost approximately $575 (Alternative B) or $500 (Alternative D). The factors generating the higher per foot costs are outlined below as they relate to Alternative D. The estimated additional costs include the 10% contingency and 26% indirect costs: 1) Traffic Control: The West Round Lake Road improvements include significant aliowances for traffic control which includes items such as concrete J-barrier, temporary paving, temporary signage and temporary striping which normally are unnecessary for low volume residential streets. Estimated additional cost: $IOO,OOO.OO(Alt D). 2) Pavement section: The proposed pavement section for West Round Lake Road includes 70% more bituminous surface mix, 50% more aggregate base and 50% more sand subbase as the typical residential street. The heavier pavement section is necessary to provide for adequate carrying capacity for the truck traffic expected on the roadway. Estimated additional cost: $ 130,000.00(Alt D). 3) Retaining WalllSoil Correction: The expansion of West Round Lake Road will require the additional excavation and construction of a retaining wall along the Nott Company parcel. In addition, the cost estimate includes provisions for approximately $20,000 in soil correction in roadway areas. Estimated additional cost: . $1 56,000.00(Alt. D). U:\WPDOC'S ARDENHIL \ROUNDLAK\COSTCOMP.MEM