slope, as feasible. Fell approximately 20 sub merchantable trees per acre (or as 

 needed to provide adequate coverage) in stands that do not have sufficient 

 downed woody debris to reduce surface runoff and erosion at direction of 

 Forest Officer. Leave slash in the harvest units where feasible and distributed 

 on skid trails upon completion of use. 



Slash 



• Retain all slash on slopes over 30% on site by in-woods processing or log 

 length skidding, restrict whole tree harvest to reduce skidding effects. Allow 

 whole tree harvest when 95% of all slash is return skidded or left within the 

 harvest unit on slopes less than 30%. Return slash from the landings back into 

 the harvest unit as it is created and distribute evenly throughout the unit. Do 

 not allow large amounts of slash to accumulate at the landings before it is 

 returned in the unit. 



Skyline Yarding 



• Where skyline is required use log length skidding, locate skyline sets on 

 ridges or convex slope sites to promote corridor locations that disperse water 

 and avoid pulling logs up draws or concave spots that could concentrate 

 runoff and erosion. Carry the leading end of the logs free of the ground at all 

 times except during lateral yarding. Require erosion control, such as slashing 

 or retaining tops within cable skidding corridors where excessive soil 

 disturbance is of an extent to cause erosion. Have the Forest Officer monitor 

 conditions and recommend erosion control as needed. 



Erosion Control 



• Install erosion control measures concurrent with use on cable corridors where 

 excessive soil disturbance or rutting (i.e. ruts over 100ft) occurs. Types of 

 erosion control may include a combination of waterbars and slash or straw as 

 required by the Forest Officer. To be effective where slash is used, require the 

 slash be in good contact with the ground (may require lopping). Complete 

 erosion control prior to acceptance of skidding operations by the Forest Officer. 



Harvest Schedule 



• Prioritized ground harvest operations to be completed during winter months to 

 minimize impacts. 



• Enforce season of use/ soil compaction restrictions in order to prevent soil 

 resource impacts. Restrict logging activities to periods when one or more of 

 the following conditions occurs unless otherwise approved in writing by the 

 Forest Officer. 



1. Soil moisture content at 4" depth less than 20% oven dry weight. 



2. Minimum frost depth of 3." 



3. Minimum of 16" loose or 8" packed snow adequate to avoid soil 

 displacement. 



Dirty Ike Salvage Environmental Assessment 2-5 



