Dip 



Soils within proposed harvest units 3,5 are (963F) Tolex/Rock 

 outcrop complex on 30-60% slopes. Rock outcrops occur on up to 

 55% of this unit. Rock at shallow depth limits road construction 

 and ny require .ripping. ) These are low to moderate productivity 

 soils that are ■limited by soil depth and droughty site 

 conditions. Primary soil concern is limiting displacement of the 

 shallow surface soils during harvesting and slash disposal. These 

 sites have a longer season of use. 



Soils dry out rapidly in most proposed harvest units and allow a 

 long season of use. Harvest operations and road use will be lim- 

 ited to dry, frozen or snow covered conditions. Erosion will be 

 controlled with standard drainage in skid trails v;here needed. 

 Soils within harvest unit 13 are a complex of Tolex/Mocmont soil 

 with rock outcrops on 25-50% of the site. Slopes are 



ENVIRONMENTAL EFFECTS & MITIGATION MEASURES 



The No-action alternative would have no direct soil effects 

 within harvest units, yet erosion on roads and associated 

 sedimentation v;ould continue. Noxious weeds vvould spread along 

 roads and into susceptable habitat types. 



Under all action alternatives soil impacts would be controlled 

 with mitigation measures including limiting the slope range of 

 tractor operations, limiting season of use, and minimizing ground 

 disturbance to levels needed for silvicultural prescriptions. 



I do not expect any significant soil impacts with the proposed 

 harvest based on the harvest unit locations and implementation of 

 the following mitigation measures and site specific 

 recommendations. Road drainage would be improved and road 

 reconstruction and new construction v;ould be completed to comply 

 with BMP' s . 



GENERAL HARVEST MITIGATION MEASURES 



* Limit equipment operations to periods when soils are relatively 

 dry, (less than 20%) frozen or snow covered to minimize soil com- 

 paction and rutting, and maintain drainage features. Check soil 

 moisture conditions prior to equipment start-up. Some moister 

 conditions are accepted on harvest units where tractors remain on 

 designated trails and timber will be v/inched to trails. 



* The logger and sale administrator v/ill agree to a general skid- 

 ding plan on tractor units prior to equipment operations. 

 Designated skid trails will be required on moderate slopes in 

 units of attached map. Tractor skidding v;ill be limited to 45% or 

 less slopes on all other sites. 



* Mark and maintain ERZ ' s Equipment restriction zones on local- 

 ized moist sites, draws and short steep slopes within harvest 

 units as noted in site specific notes. 



