When cable yarding, full suspension is required when yarding across 

 perennial streams. Full suspension is also desirable when yarding across 

 unstable areas. 



With tractor yarding systems, equipment operation should generally be 

 limited to stable terraces above stream sources. Logs below the stable 

 terraces should be winched to the terrace. Equipment should not be operated 

 within 50' of the channel banks. 



EROSION CONTROL 



Erosion control measures are key elements in preventing long-term degra- 

 dation of water quality. Proper location and construction of skid trails and 

 water bars will result in run-off from skid trails being distributed onto 

 undisturbed litter well away from the drainage channels. 



Sensitive disturbed areas should be seeded to grass as soon as logging 

 ceases in an area. 



STREAM CLEANOUT 



Prevention of debris deposition is generally better and less costly than 

 removal . 



Equipment such as tractors and rubber tired skidders should not be used 

 directly in any stream for cleanout, except in special cases and subject to 

 prior review of a hydrologist and fisheries biologist. 



Stream cleanout should be done by hand. Hand piling should remove 

 material from the channel and place it well above the normal high water mark. 



Pre-existing stable debris, such as keyed in logs, should not be removed. 



SLASH DISPOSAL/SITE PREPARATION 



The same equipment restrictions that apply for timber harvesting apply 

 during slash disposal and site preparation. 



Dozer scarification or piling is not permitted unless there is no pes- • 

 sibllity of excessive soil compaction or stream slltatlon. 



Only hand constructed fuel breaks are reconmended within an SMZ. 



Steep slopes containing material which would roll down-slope and fall 

 Into a stream during burning should receive special attention. The area may 

 have to be hand piled on a stable location, or the area may have to be 

 whole-tree yarded. 



