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COMMENTARY - SHEET 4 of 12 COST ESTIMATE - SHEET 4 OF 12 As discussed in the commentaries for the previous 2 sheets, grade stabiliza- tion structures are included as a general recommendation. ITEM Recommended length and elevation requirements are provided on the plan for a pedestri an bri dge bei ng proposed by the City of Golden. For the City-owned property downstream of Fi rst Street, the recommend at ion is to uti 1 i ze the planned trail system for maintenance access to the existing rock-lined channel and obtain any easements needed to assure access rights. Channel Improvements Street Crossings Utility Relocation Subtota 1 Contingencies (15%) Engineering, Legal & Administrative (15%) The exi st i ng rock-l i ned channel appears to be in good condi t ion. Peri odi c pl acement of rock wi 11 be requi red as part of a regul ar mai ntenance program. The recommendation for the existing rock-lined channel is to maintain the existing condition. No improvement costs to the existing channel are included in the following cost estimate other than the costs associated with construc- ting the grade stabilization structures. Selective rock placement is included in the annual O&M cost figure. TOTAL CONSTRUCTION COST Right-of-Way Acquisition TOTAL CAPITOL COST OF IMPROVEMENTS The recommended plan for this reach is floodplain regulation. TOTALS IN EACH JURISDICTION City of Golden Jefferson County Annual Operation and Maintenance Costs COST I I I I I I I I I I I I I I I I I I I $ 52,000 -0- -0- 52,000 7,800 7.800 67,600 -0- 67,600 67,600 -0- (4,700)