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7 <br /> Public Amenities Master Plan <br /> Preliminary Cost Estimate July 2009 <br /> Wetland C and Walton Creek <br /> Description of Potential Project Elements <br /> Excavate new Walton Creek stream alignment from "Y" connection at private developer's <br /> habitat pond to Snohomish River outfall; excavate side channels throughout portions of <br /> Wetland C; provide up to three additional channel outfalls on Snohomish River re-grading <br /> to provide a naturalistic low-bank condition and install large woody debris; create <br /> hummocks throughout portions of Wetland C and plant with diverse upland species; <br /> provide reinforced grass surface access road for PUD tower maintenance; provide looped <br /> wetland access trails w/ boardwalk and bridge segments as shown (cost shown in High <br /> category); provide interpretive stations and signage. <br /> Estimated Area Costs Low High <br /> Earthwork $225,000. $427,300. <br /> Bank stabilization/enhance. and creek enhance. 525,000. 1,008,000. <br /> Utilities and lighting 0. 0. <br /> Drainage 0. 0. <br /> Structures 95,000. 700,000. <br /> Site furnishings and signage 125,000. 250,000. <br /> Pavement 50,000. 50,000. <br /> Soil preparation and planting 0. 0. <br /> Subtotal 1,020,000. 2,435,300. <br /> 10% Mobilization 102,000. 243,500. <br /> 20% Contingency 204.000. 487.000. <br /> Subtotal 1,326,000. 3,165,800. <br /> 9.2% Sales tax 122,000. 291,300. <br /> 20% Engineering and Construction Admin. 265,200. 633,200. <br /> TOTAL $1,713,200. $4,090,300. <br /> Page 5 of 9 <br /> 98 <br />