28d_NCS000250_DewateringBasin

Dewatering Basin Design *items in red are inputs
Version 2.27.09
The volume of the borrow pit dewatering basin will be based on a 2 hour retention time. Using
the formula V= 8.0203 * Q * t where, V is volume in cubic feet, Q is the pump rate in gallons per
minute (GPM), and t is the retention time in hours. The pump rate is not to exceed 1,000 GPM
(60,000 GPH).
STEP 1: Input required variables
Pump Rate:
Retention Time:
Required Volume:
1000 GPM
2 hours
16040.E ft'
STEP 2: Design of the Dewatering Basin
The volume of the borrow pit dewatering
basin will be based on a 2 hour retention
time. The pump rate shall not exceed
11000 GPM (60,000 GPH). The contractor
may desire a greater retention time for
managing turbidity; however, work
associated with this increased volume will
be considered incidental.
Final Required Volume: 16040.E lft,5
Design Depth: *not to exceed 3 feet
Proposed Basin Side Slopes: :1 side slopes *must be at least 1.5:1 or flatter
OPTIONS
2:1 (L:VIO 3:1 (L:VIO
Suggested Top Width (ft):
52
43
Suggested Top Length (ft):
104
129
Final Design Top Width (ft):
Final Design Top Length (ft):
112
138
Final Design Depth (ft):
3
3
Verify Storage (ft
16629.00
OK
16641.00
OK
The dewatering basin shall be designed in accordance with the Borrow Pit
Dewatering Basin Detail Drawing.
Comments: