Hello: I am looking for opinons for the location of the structural backfill influence zone for foundation wall or retaining wall design. I typically recommend eqivelent fluid pressures for open graded material within the influence zone of the wall, ie. 45+Phi/2. For cohesionless material this...
We need to proofroll a heavy haul road using a minimum simulated wheel loading of 90 psi. The tandem axle dump truck we are planning on using will have a tire pressure of 110 psi. The issue is, what do you base the loading on; the 110 psi tire pressure or the weight of the load divided over...
Hello: I need to determine the minimum water level in various empoundments based on a 50 year drought return period. The minimum water level is for certifying potential firefighting water sources in rural areas in accordance with NFPA Standard 1142. I've contacted NRCS, however, they can only...
