Class Exercise Soil Stabilization

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

• 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 Calculations

• Use Table 2-2 to determine which slopes require stabilization

Soil Stabilization Calculations

• Calculate the total DSA that will require soil stabilization

Sediment Control Calculations

• Use Table 2-2 to determine which slopes require linear barriers

Linear Barrier Calculations

• Calculate total length of Linear barrier needed

Slope Length

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

Slope Length

• Spacing of Fiber Rolls

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

• Calculate the total DSA that will require fiber rolls

Class Exercise

• Break in to groups of 4 to 5 people

• Handouts:

• Plan sheet
• Tables

• Calculate SS and SC materials

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)
• 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

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construc -> Profesor Adrian M
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construc -> Construction of contractual terms
construc -> Capital Works Management Framework Guidance Note Public Works Contracts gn 5
construc -> Allow enough time e g. 10-15 minutes. Allow enough time e g. 10-15 minutes
construc -> Sh-22297-11 from osha. It does not necessarily reflect the views or policies of the U. S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsement by the U
construc -> Clue: a person who paints walls, buildings, bridges, and other structural surfaces, using brushes, rollers, and spray guns