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SJRWMD Stormwater Management Projects Cost-Sharing Application Form 2005-2006 <br /> B-6. Provide a detailed project description . Identify the type and amount of pollutant load <br /> reduction that will be achieved by the project (e.g., tons/year). What is the cost per unit of <br /> pollutant removed? Include approximate dimensions and capacities, if applicable. ( Show how <br /> estimates are derived.) <br /> In fiscal year 2003 -2004 , the County Road & Bridge Divisionlap ced approximately 54 ,237 tons of <br /> road material (predominate) marl) on the unpaved roads to replace the road surface that had washed <br /> or blown awayuring that period. This equates to approximately 236 tons of material replaced per <br /> mile of unpaved road each year. Most of this material (54,237 tons per year) ends W in the Lagoon <br /> a«d substantially contributes to the Lagoons suspended solids loading poble � ically, the road <br /> V V1V111. 1 T <br /> material is veru fine and when it reaches the Lagoon, it will cloud the water and coat seagrass leaves , <br /> preventing sunlight from reaching the seagrass . Also, when it settles , it contributes to muck deposits <br /> sits <br /> that prevent the spread of seagrass on the Lagoon's bottom and it is easily placed back into suspension <br /> by boat propellers and wind and wave action. Reducingthe he suspended solid load into the Lagoon <br /> will significantly benefit the seagrass and the Lagoon in general . <br /> Assumming a design and construction cost of $ 93 . 76 per lineal foot of new road, the estimated <br /> cost for 4,266 feet of newly paved roads with stormwater treatment systems is $400,000 . Assumming <br /> 191 tons of suspended solids are prevented from reachingthe he Lagoon each yearby this project, this <br /> equals an expenditure of $2 ,094.24 per ton of suspended solids removed for the first year. Once <br /> constructed, maintenance costs are minimal and the yearly cost per ton removed is insignificant. <br /> ( 1 ) 33rd Street - Desiw.ed and permitted through SJRWMD ( 1 , 010 feet total length) <br /> (2) Granada Gardens - Designed and permitted through SJRWMD (2 ,256 feet total length) <br /> (3 ) 83rd Place - Not designed or permitted - ( 500 +/- feet total length) <br /> (4) 47th Avenue - Not designed or permitted - ( 500 +/- total length) <br /> i <br /> EVALUATION FACTORS related to question B-6 : <br /> Detail project methodologies . Identify the type and amount of pollutants that will be removed by the <br /> project (e. g, , tons/year) . Will the project be cost-effective? 0-20 points . Scoring is based on rater 's <br /> assessment of the effectiveness of the project at achieving the stated pollutant load reductions. <br /> A-5 <br />