A mine dump in a small mining town is located next $($and along$)$ the main access road into town. The dump is $300m$ long and divided into $5$ sections of varying heights: $8m,12m,15,20m$ and $25m.$ The internal friction angle of the dump material is $30$ degrees, density $2\mathrm{.}5\frac{g}{c}m3$ and the internal cohesive strength of $50$kpa. Dry Angle of repose of the dump material is $40$ degrees and wet angle of repose is $35$ degrees. The town's weather is as follows:

$\backslash$table$[[$Period$,$Weather$],[$May $-$ August,Semi arid$],[$Sep $-$ Dec,Moderate rainfal$],[$January $-$ April,Heavy Rainfall$]]$

Investigate the safety of motorists driving along this route throughout the year and provide recommendations where necessary.

C cohesion of the soil mass $($ kPa

$$ density of the soil mass $(k\frac{g}{m}3)$

$$ angle of internal friction of the soil mass $H$ height of the slope $($m$)$