leave field usual water condition erratic runoff heavy grazing mountains problem equitable stream flow vital along base range coal air nash ash UV loll g author robert harmful storm 91 contention grazing responsible great damage during water bulletin 91 study manti national forest utah history twenty yea yea sea grazing controlled restoration natural cover shrub upon grazing stream flow port wasatch mountains within manti national forest central utah region dependent upon water supply past danger LARGELY GRAZING responsible FLOODS row resume account week roads coal mine machine company down impossible get coal roads fields week rogers ri bulletin grazing view region sin 1850 doubt ted region sub ar sc during spring 1910 pr mac ne sand forest service