1878

1879

1880

1881

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1

8

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1

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1873

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18791879

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CONCRETE PAVING & STORM DRAINAGE SYSTEMF.F.E. = 1883.75

105,000 SF (300' x 350')

EX-A2

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EX-C1

EX-A3

EX-A4

EX-A5

EX-A6

EX-A7

EX-A8EX-A9

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"ALL UTILITIES, WATER, FIRE, SANITARY, GASAND ELECTRICAL LINES, AND LATERALS MUSTBE MARKED WITH LOCATOR WIRE ANDDETECTOR TAPE".

Over Excavated Sediment Trap (Sediment Storage Calcs.) - Structure B6

1. Drainage Area = 1.72 ac.2. Required sediment storage = 67 cy/ac * drainage area Required sediment storage = 67 cy/ac * 1.72 ac. = 115.2 cy = 3111.4 cf3. Assume excavation (minimum of 1.5 ft.) = 1.5 ft.4. Assume (shall not be steeper than 2:1) = 2:15. Determine required surface area SA min = Required sediment storage / excavation depth SA min = 3111.4 cf / 1.5 ft. min = 2074 sf6. Assume shape of excavation and determine dimensions. (A rectangular shape with 2:1 length to width ration is recommended.) Circular Dia 51.4 ft Provided: Dia 55 ft = 2374 SF SA >2074 SF SA

STRUCTURE B6 - DRAINAGE AREADRAINED AREA = 1.72

B6 - OVER EXCAVATEDSEDIMENT TRAP

1 inch = ft.

( IN FEET )

GRAPHIC SCALE

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Over Excavated Sediment Trap (Sediment Storage Calcs.) - Structure B5

1. Drainage Area = 1.42 ac.2. Required sediment storage = 67 cy/ac * drainage area Required sediment storage = 67 cy/ac * 1.42 ac. = 98.5 cy = 2659.2 cf3. Assume excavation (minimum of 1.5 ft.) = 1.5 ft.4. Assume (shall not be steeper than 2:1) = 2:15. Determine required surface area SA min = Required sediment storage / excavation depth SA min = 2659.2 cf / 1.5 ft. min = 1772 sf6. Assume shape of excavation and determine dimensions. (A rectangular shape with 2:1 length to width ration is recommended.) Circular Dia 47.5 ft Provided: Dia 50 ft = 1962 SF SA >1772 SF SA

STRUCTURE B5 - DRAINAGE AREADRAINED AREA = 1.42

B5 - OVER EXCAVATEDSEDIMENT TRAP

Over Excavated Sediment Trap (Sediment Storage Calcs.) - Structure B3

1. Drainage Area = 0.45 ac.2. Required sediment storage = 67 cy/ac * drainage area Required sediment storage = 67 cy/ac * 0.45 ac. = 30.1 cy = 814 cf3. Assume excavation (minimum of 1.5 ft.) = 1.5 ft.4. Assume (shall not be steeper than 2:1) = 2:15. Determine required surface area SA min = Required sediment storage / excavation depth SA min = 814 cf / 1.5 ft. min = 542 sf6. Assume shape of excavation and determine dimensions. (A rectangular shape with 2:1 length to width ration is recommended.) Rectangular L = 30 ft W = 18 ft Provided: L = 30 ft W = 20 ft = 600 SF SA >542 SF SA

STRUCTURE B3 - DRAINAGE AREADRAINED AREA = 0.45

B3 - OVER EXCAVATEDSEDIMENT TRAP

Over Excavated Sediment Trap (Sediment Storage Calcs.) - Structure B2

1. Drainage Area = 0.20 ac.2. Required sediment storage = 67 cy/ac * drainage area Required sediment storage = 67 cy/ac * 0.20 ac. = 13.4 cy = 361 cf3. Assume excavation (minimum of 1.5 ft.) = 1.5 ft.4. Assume (shall not be steeper than 2:1) = 2:15. Determine required surface area SA min = Required sediment storage / excavation depth SA min = 361 cf / 1.5 ft. min = 241 sf6. Assume shape of excavation and determine dimensions. (A rectangular shape with 2:1 length to width ration is recommended.) Circular Dia 17.5 ft Provided: Dia 20 ft = 314 SF SA >241 SF SA

STRUCTURE B2 - DRAINAGE AREADRAINED AREA = 0.20

B2 - OVER EXCAVATEDSEDIMENT TRAP

Over Excavated Sediment Trap (Sediment Storage Calcs.) - Structure B1

1. Drainage Area = 0.20 ac.2. Required sediment storage = 67 cy/ac * drainage area Required sediment storage = 67 cy/ac * 0.20 ac. = 13.4 cy = 361 cf3. Assume excavation (minimum of 1.5 ft.) = 1.5 ft.4. Assume (shall not be steeper than 2:1) = 2:15. Determine required surface area SA min = Required sediment storage / excavation depth SA min = 361 cf / 1.5 ft. min = 241 sf6. Assume shape of excavation and determine dimensions. (A rectangular shape with 2:1 length to width ration is recommended.) Circular Dia 17.5 ft Provided: Dia 20 ft = 314 SF SA >241 SF SA

STRUCTURE B1 - DRAINAGE AREADRAINED AREA = 0.20

B1 - OVER EXCAVATEDSEDIMENT TRAP

AREA A6AREA A5

AREA A3

AREA A2

AREA A1