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Practical Approachct f~Effecuce E & S Control - 81 <br />For example, to install the straw blanket mentioned in the CM example, the <br />manufacturer requires two 6" x !" x 6" !!11 gage wire staple be placed per <br />square yard to hold the blanket firmly to the ground. If the staples themselves <br />cost $ .OS each, the an additional cost of $ .10 per square yard (or 5484 per <br />acre) must be added to the material costs. <br />Field Note: The ntonber of fasrenets for rolled materials varies based on <br />material type, soil conditions, runoff volume and length and <br />steepness of slopes. <br />CI Installation Costs <br />Simply put, this variable accounts for the manpower necessary to apply an <br />erosion control technique or material. For the purpose of this discussion, it is <br />pgt the contractor installed orice, which is generally at least double the material <br />costs and has profit, overhead and other items built in. CI relates to the actual <br />installation costs accrued during installation based on the number of manhours <br />necessary to complete the work. For example: <br />Two men can install four straw blankets in 1 hour. <br />4 blankets x 60 yds/blanket = 240 yds per hour <br />Hourly labor rate = $10.00/hour <br />C[ =Hourly labor cost(additive)/ yazds per hour <br />_ $20.00/240 yd per hr <br />= S .08 per sq yd <br />or = S .Ol per sq tt <br />or = 5403.33 per acre <br />Field Note: Installation costs can vary significantly based on the type of <br />mechanical equipmenr being used and the number of laborers involved. For <br />example, where two men might instal! four blankets in one hour, four men might <br />be capable of installing ten blankets in one hour. This is because work patterns <br />which stage installarions or divide up activities imo specific functions, such as <br />stapling, rolling the material out, digging trenches, etc. increase the efficiency <br />of larger crews. <br />m 1995 [ECA <br />