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~.0 DEVELOPI'IE\T CF RISK A:cEcc\'IE~iT ~L~P <br /> <br />Based upon geomorphologic and hydrrlo~ic Sndings during the June <br />1593 and September 199! site ~zsits, a risk assessment map has been derived. <br />As sho«-n on Figure 2.0 the area surveyed n~as partitioned into risk Zones, ~•rith <br />the risk referrns to construction acti•.av. The three risk levels used: 1) hish <br />risk fired) refers to cress where construction activity is to be avoided because <br />of obvious slope instability; 21 medium risk (.brown) refers to areas vrhere <br />construction can he conducted only if slope stability is maintained using proper <br />buttressing and drainage procedures, and the area is monitored for creep <br />during and after construction; 3) low risk (green) refers to areas where slope <br />creep is possible, but because the area appears =_table, construction can be <br />• performed provided that spread footings are used and proper drainage <br />maintained. <br />Also sho~i-n on Figure 2.0 are recommendations on where to place <br />facilities necessary for coal extraction. Two stack tubes could perhaps be best <br />situated on a bench cut on the slope just northwest of the existing fan portal. <br />The slope appears stable and no springs or hummocky terrain were observed <br />in that area during the 1993 mapping event. The conveyor is perhaps best <br />routed along the existing Sylvester Gulch road. Although landslides are <br />mapped along the western side of Sylvester Gulch, they are located within a <br />9 <br />