08/11/2010 Council Packet (2) - Laserfiche WebLink

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Construction Estimate Birch Street (CSAH 34) /Ware Road Improvements City of Lino Lakes, Minnesota August 11, 2010 Page 2 • Bituminous removal and sawcut quantities included reconstruction of private driveways where necessary. • The new northbound right -turn lane on Ware Road assumed a 4 -foot expansion of the existing width. Curb removal and replacement were included for this widening. • The regional trail was moved north to maintain the existing boulevard between the trail and the roadway. • A geotechnical investigation was not completed. Geotechnical information from previous projects in this area indicated that the existing soil is a mix of sand, fill material, and organic material. This construction estimate included the removal of 24 inches of topsoil, organic material, and existing soils. • The proposed pavement section was based upon a typical section assumption provided by the County and consisted of 6 inches of bituminous pavement over 6 inches of class 5 aggregate base. A 1 -foot subcut that would be backfilled with select granular material was also included. • The proposed project was expected to be less than 1 acre of disturbed area and will therefore not require a storm water permit from the Rice Creek Watershed District or the MPCA. This construction estimate is based on the above items and is considered preliminary. Preparation of fmal plans will be required to address all of the issues and to obtain a more accurate construction estimate. The total project cost is estimated to be $925,000, including contingencies and right -of -way acquisition. The following contingencies have been added to address other items necessary for construction of the proposed project: • 15% contingency to account for items that will not be quantified until construction plans have been created. • 20% contingency for engineering plans, specifications, and bid package preparation. • 5% contingency for legal, fiscal, and administration duties, which does not include expenses associated with the bond. • 8% contingency for construction services and observation. The attached summary table shows the estimated construction costs for each portion of the proposed project, the Birch Street improvements and the Sioux Drive connection, followed by the right -of -way costs and contingencies. Itemized construction estimates are then attached for each project segment. All unit prices and cost estimates reflect construction in year 2012.