Class Exercise Soil Stabilization

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Class Exercise

  • Soil Stabilization

  • Sediment Controls

  • Verify the contractors calculations for the quantity of material need to stabilize a Disturbed Soil Area (DSA)


Soil Stabilization and Sediment Controls Calculations



Soil Stabilization Calculations



Soil Stabilization Calculations



Sediment Control Calculations



Linear Barrier Calculations



Slope Length

  • Use Table 2-2 to determine what slopes require breaking up the length



Slope Length



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


Slope Length Calculations

  • Pythagorean Theorem

    • A2 + B2 = C2
    • A=42
    • B=14


Soil Stabilization Calculations



Class Exercise



Erosion and Sediment Control Labor Estimates

  • Soil Stabilization*

    • Hydroseeding
      • 150,000 ft2 a day (flat turf)
      • 22 bales @ 50lb a bale in a 3000 gal truck
    • Hydro Mulch (BFM)
    • Straw Mulch
      • .4 Hectare an hour
      • 1 to 2 bales a min
      • 74 lb bale covers 800 ft2 @ 2 tons per acre



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