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  1. SharkswithLasers

    Sizing an underground disposal field in silty sands

    A contractor is proposing to dispose of 250 GPM of pumped groundwater to an underground infiltration disposal gallery (piping to gravel bed) below frost line in the vadose zone (4 foot frost depth, 30 feet to water table, fairly uniform silty sands below 4 foot depth). The pumpout will occur...
  2. SharkswithLasers

    Sizing an Underground Disposal Field

    A contractor is proposing to dispose of 250 GPM of pumped groundwater to an underground infiltration disposal gallery (piping to gravel bed) below frost line in the vadose zone (4 foot frost depth, 30 feet to water table, fairly uniform silty sands below 4 foot depth). The pumpout will occur...
  3. SharkswithLasers

    Dewatering my Excavation

    Say I have a rectangular excavation 120 feet by 80 feet by 20 feet deep (below grade surface) in the shallow water table in sandy soils (K = 10E-2 cm/sec). Sheet piling/deadmans are holding the sides of the excavation. Water table is at 10 feet bgs. How can I estimate the pumping rate (gpm)...
  4. SharkswithLasers

    Are snow loads considered "dead loads"?

    Are snow loads dead loads? Rain loads/ponded water on roof? Thought I'd try here first
  5. SharkswithLasers

    Design of Drilled Shaft Foundation

    I would like the following information for use in studying for the PE exam: Given: I have a boring log that indicates field "N" values are fairly consistent, ranging from 10 to 15 bpf from the surface to 35 feet bgs, soils are silty sands, with a few thin (~2-inches) clay lenses...

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