laws and rules. No herbicides would be applied where runoff could 

 affect surface waters 



• DNRC will monitor the project area disturbed sites for new noxious 

 weeds and develop plans as needed to address weed problems. If new 

 infestations of noxious weeds are noted, a weed management plan will 

 be developed and implemented and coordinated with the lessee efforts. 



4.3.1.6.2 Cumulative Effects of Alternative A: No Harvest (No 

 Action) 



Under the Alternative A No Harvest (No Action), cumulative effects are 

 expected occur from suppression activities. Increased vehicle traffic 

 increases the risk of the spread of noxious weeds as well as new invader 

 species. 



4.3.1.6.3 Alternative B: Harvest 



Under the proposed activities, an increase in ground disturbance could 

 increase or introduce noxious weeds throughout roads and forested areas. 

 For this project an Integrated Weed Management (IWM) approach would 

 be implemented that would include: prevention, revegetation and weed 

 control measures for spot outbreaks, which are considered the most 

 effective weed management treatments. Short-term goals would be to 

 reduce existing noxious weed populations and increase native plants and 

 seeded grasses. Where weeds are replaced with grasses, erosion would be 

 reduced due to the improved plant cover. Localized herbicide applications 

 would be used, primarily along disturbed roadside edges and spot 

 treatments of small infestations. To protect water quality, herbicide would 

 not be applied where runoff could enter surface waters or riparian features. 

 Re-entry could increase the risk of cumulative impacts, if necessary 

 mitigation measures to control noxious weeds are not implemented for 

 each individual re-entry. 



4.3.1.6.4 Cumulative Effects of Alternative B: Harvest 



The cumulative effect of increasing weeds could occur with increased 

 disturbance associated with the fire, and timber harvest in areas where 

 weeds are established. The risk of cumulative increases in weeds is 

 moderate compared to no-action, based on the combination of mitigations 

 mitigations to limit areas of disturbance, revegetated roads, monitor for 

 new weeds and herbicide treat nev\' weed. Re-entry could increase the risk 

 of cumulative impacts, if necessary mitigation measures to control noxious 

 weeds are not implemented for each individual re-entr>'. 



Dirty Ike Salvage Environmental Assessment 4-8 



