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Eaiibit "D" <br />Development Costs <br />Costs associated with the Oslo Riverfront Conservation Area Flinn Tract development are categorized <br />into initial development costs and annual maintenance costs. For planning purposes, it is estimated <br />that annual maintenance costs will be approximately $25 per acre of uplands or $2,100 per year. <br />Proposed Improvement <br />Function <br />Estimated Cost Range <br />Entrance road <br />Pervious parking area <br />At 8 Street to parking <br />For 15 to 20 vehicles <br />$8,000 to 10,000 <br />Trailhead information kiosk <br />For entire Greenway <br />$750 to 1,500 <br />Marked upland trails <br />Connect to impoundment roads <br />$10,000 to 15,000 <br />Elevated walkways (including <br />permitting cost) <br />Across ditch & mangrove habitat to <br />observation deck <br />$180,000 to 220,000 <br />Interpretive signage & wildlife <br />viewing areas <br />Along trails and on elevated walkway as <br />appropriate <br />$2,000 to 3,000 <br />Lagoon observation deck/ canoe <br />landing <br />For lagoon viewing, fishing and access <br />from the Lagoon <br />$15,000 to 20,000 <br />Improvement of impoundment <br />roads <br />To better ensure safety of users <br />2" shell and grade <br />$4,000 to 5,000 no silt fence <br />$6,000 to 7,000 w/ silt fence <br />Directional and information <br />signage <br />As needed to ensure safe and enjoyable <br />user experience <br />$1,000 to 1,200 <br />Gate <br />As needed to prevent access to adjacent <br />non -participating landowners, etc. <br />$400 to 600 <br />Fencing (3,4001.f.) <br />At SW corner of original parcel28 <br />000 <br />Total Construction Estimates <br />$251,150 to $306,300 <br />15% Contingency <br />Add for pre -design flexibility <br />$37,700 to $45,900 <br />Design, Permit, & Construction <br />Inspection <br />$15,000 to 25,000 <br />MAXIMUM TOTAL <br />5303,850 to $377,245 <br />ADMINISTRATION <br />18 <br />