Laserfiche WebLink
t • Practical Approac~ar EBtxtive E .4 5 Control - 8I <br />' For example, to install the straw blanket mentioned in the CM example, the <br />manufacturer requires two 6' x 1" x 6" All gage wire staple be placed per <br />' square yard to hold the blanket ftrntly to the ground. If the staples themselves <br />cost S .OS each, the an additional cost of $ .10 per square yard (or $484 per <br />acre) must be added to the material cosu. <br />1 <br />Field Note: The ntanber of fasteners for rolled materials varies based on <br />material type, soil conditions, runoff volume and length and <br />steepness ojslopes. <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 i <br />not the contractor installed price. which is generally at least double the material <br />cosu and has profit, overhead and other items built in. CI relates to the actual <br />installation cosu accrued during installation based on the number of manhours <br />t 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 />CI =Hourly labor cost(additive)/ yards per hour <br />_ $20.00/240 yd per hr <br />= 5 .08 per sq yd <br />or = $ .Ol per sq ft <br />' or = 5403.33 per acre <br />' Field Note: Installation costs can vary significantly based on the type of <br />mechanical equipment being used and the number of laborers involved. For <br />example, where nvo men might install 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 into specific functions, such as <br />stapling, rolling the material out, digging trenches, etc. increase the e_(j`iciency <br />of larger crews. <br />1 <br />' O 1995 IECA <br />