Lands and private. There is approximately 23.06 miles of road in the Dirty Ike 

 watershed. Some roads in the proposed area do not meet Best Management 

 Practices Standards (BMP's). There are specific locations at road crossing 

 where direct delivery of sediment to the stream channel is occurring. Bum 

 severity in the Dirty Ike watershed was mostly a stand replacement fire of 

 approximately 109 acres with a small 2-acre patch of mixed severity. 



West Fork Ashby Creek 



The West Fork Ashby watershed is approximately 2500 acres that is drained 

 by a Class I stream channel, with intermittent and ephemeral unnamed 

 tributaries as well as several draws with no discemable stream channel. There 

 are two unnamed tributaries to the West Fork of Ashy Creek located in the 

 project area. High levels of timber harvest and road building have impacted 

 the watershed. Extensive harvest has increased water yield levels to those 

 effects associated with detrimental water yield increases. Detrimental water 

 yield increases have caused increased channel instability and increased 

 sediment yields. Direct sediment delivery from the road to the stream channel 

 is occurring, at stream crossings and at poor road location reaches. Grazing in 

 the riparian area has had long-term impacts on the stream channel. Increased 

 channel instability has occurred through bank trampling, decreased riparian 

 vegetation and increased width depth ratios. Some stream reaches in the 

 middle and lower portions watershed show signs of instability and high levels 

 of sediment increases. Ownership in the watershed is a combination of Plum 

 creek State Trust Lands and Private. There is approximately 30.3 miles of 

 road in the West Fork Ashby Creek watershed. Some roads in the project area 

 do not meet BMP standards. 



Approximately 311 acres burned in the West Fork of Ashby Creek. Of the 

 area that burned, 49 acres was a mixed severity bum and the remaining 362 

 were a stand replacement fire. 



Wallace Creek 



The Wallace Creek watershed is approximately 5155 acres that is drained by a 

 Class I stream channel, with intermittent and ephemeral unnamed tributaries 

 as well as several draws with no discemable stream channel. . 

 There are several dry draws with no discemable stream channel located in the 

 project area. Just below the project area in section 7, T12N, R16W is the 

 upper reach of Wallace Creek, which is a class 1 perennial stream channel. 



Moderate levels of timber harvest and road construction as well as historic and 

 current mining activity have impacted the upper portions of the Wallace Creek 

 watershed. Approximately 61% of the watershed has been harvested, 

 approximately half occurred before 1980. Water yield levels show moderate 

 levels of WYI at 8.8% Reaches of Wallace Creek that flow through sections 

 13 and 24, T12N, R17W and section 7, T12N. R16W were obser\ed to have 

 stable stream channel conditions and healthy levels of riparian vegetation. 



Dirty Ike Salvage Environmental Assessment 3-3 



