1987-12-01_PERMIT FILE - C1981017 (286)

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Ch�:;ter V Areas of severe erosion are common both along spd by roads and on mine benches. Y uninterrupted insufficient or poor surface drainage; long, fill or cut slopes may also contribute to severe erosion. inage and erosion most nstabilitblems are the It appears that dra most important factors contributing ding, tilling, gullying, features and causing sloug g rockfall and muds ides. study, are for the most part The actual slopes along the haul roads, say s the fairly stable: rare along the haul roads and absent on Potentially unstable slopes are very mining include areas that were unstable prior to any mine benches. They , of fills probably caused a further activity; excavations of cuts or placement decrease of stability and increased instability of fills. w the the steep slopes above and Belo In establishing vegetative cover along which will serve as, in d Mid-Continen effect, a small bench,t believes that the narrowed roadway, i will be helpful. effect, tative study of steep slopes which has been completed by The vege plant growth Intermountain Soils notes that: spoil material appears suitable as a -- medium. in successfully By far the moss limitingfactor j reVegetating these sites is the stee-p slopes. Berms, furrows or bench.,s may Y provide enough temporary relief from sunace instabiliy to a!!ow more uniform initial establishment from top to bo�.om. y the a'� s'abiii_ation and Because of the erosion of Steep Slopes traversed and be ow the road -, its will be aided establishment o� veg „�-tive would be by interruption of surface runoff do ro'aSIB Jay, act acting as a small bench• afforded by retention of one narrowed use of the roads is to provide the U.S. Forest Service access The pest-mining use land management-* near the tunnel portal, will be • A landslide area above the No. 3 Minerr g road,dicates the slide area has monitored for stability If such mo Mid-Continent will initiate further discussionn ne the U.S. de-stabilized, Service as to maintaining access to the No. 3 road after reclamation.