MOA
requires slope stabilization study of any site improvements that general slope
steeper than 2H:1V and/or projects located at Seismic Hazard Zones 4 and 5. The
MOA recommend a pseudo-static seismic load of 0.3g for Seismic Hazard Zones 1,
2 and 3; while a pseudo-static seismic load of 0.2 g for Seismic Hazard Zones 4
and 5. We utilize SLOPE/W to simulate the subsurface condition at the project
site in both static and pseudo-static conditions. MOA requires safety factor of
1.7 under static condition, and safety factor of 1.1 pseudo-static condition.
We can also provide slope reinforcement recommendation if the proposed cue/fill
slope does not acquire adequate safety factor on its own.