Given the following planar block slide data: Mohr–Coulomb failure criterion applies
1 slope height H = 613 ft (187.8 m);
2 failure surface angle α = 34◦;
3 slope angle β =?◦;
4 friction angle φ = 30◦;
5 cohesion c = 1440 psf (0.069 MPa);
6 specific weight γ = 162pcf (26.63kN/m3).
Find the maximum slope angle β possible, when the water table is drawn down below the toe of the slope. Note: No tension crack forms.