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Class Exercise

2. Soil stabilizationEstimating the amount of soil stabilization material need to protect disturbed soil areasSediment controlEstimating the amount of sediment control material need to protect disturbed soil areasBreaking up slope lengthEstimating the amount of fiber rolls or gravel bag berms needed to break-up slope lengths .

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Class Exercise

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    1. 1 Class Exercise Soil Stabilization Sediment Controls Verify the contractors calculations for the quantity of material need to stabilize a Disturbed Soil Area (DSA)

    2. 2 Soil stabilization Estimating the amount of soil stabilization material need to protect disturbed soil areas Sediment control Estimating the amount of sediment control material need to protect disturbed soil areas Breaking up slope length Estimating the amount of fiber rolls or gravel bag berms needed to break-up slope lengths Soil Stabilization and Sediment Controls Calculations

    3. 3 Soil Stabilization Calculations Use Table 2-2 to determine which slopes require stabilization

    4. 4 Soil Stabilization Calculations Calculate the total DSA that will require soil stabilization

    5. 5 Sediment Control Calculations Use Table 2-2 to determine which slopes require linear barriers

    6. 6 Linear Barrier Calculations Calculate total length of Linear barrier needed

    7. 7 Slope Length Use Table 2-2 to determine what slopes require breaking up the length

    8. 8 Slope Length Spacing of Fiber Rolls

    9. 9 Slope Steepness Calculating Slope Steepness Rise Over Run Slope steepness can be expressed by comparing the slopes horizontal component to the vertical component – 1V : 2H

    10. 10 Slope Length Calculations Pythagorean Theorem A2 + B2 = C2 A=42 B=14

    11. 11 Soil Stabilization Calculations Calculate the total DSA that will require fiber rolls

    12. 12 Class Exercise Break in to groups of 4 to 5 people Handouts: Plan sheet Tables Calculate SS and SC materials

    13. 13 Soil Stabilization* Hydroseeding 150,000 ft2 a day (flat turf) 22 bales @ 50lb a bale in a 3000 gal truck Hydro Mulch (BFM) 12,000 ft2 per 3000 gal truck 5 loads per day Straw Mulch .4 Hectare an hour 1 to 2 bales a min 74 lb bale covers 800 ft2 @ 2 tons per acre Erosion and Sediment Control Labor Estimates

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