would be brought up to applicable BMP standards for the duration of activity. The proposed 

 Action Alternative would construct approximately 1.3 miles of new road to the north of Cilly 

 Creek in Unit 2; this road would meet all applicable BMPs. No stream crossings would be 

 constructed or replaced with the proposed project. All existing stream crossings are adequately 

 functioning and not in need of replacement. Road-construction and surface-drainage work 

 would increase the risk of sedimentation in the short term. Over the long term, surface- 

 drainage-improvement activities would reduce the erosion and sediment delivery risk from the 

 current levels and may improve water quality in the proposed project area. 



CUMULATIVE EFFECTS 



Cumulative effects of the No-Action Alternative on water quality would be similar to the 

 situations described in the existing conditions. The water quality would be unaffected by the No- 

 Action Alternative, and Cilly Creek in the proposed project area would continue to be affected by 

 natural and preexisting conditions. 



• Action ^LTEHJsijiTn^E 



Past activity'in the proposed project area has mainly consisted of timber harvesting. On sites 

 where timber was harvested, there has been substantial vegetative recovery with no apparent 

 impact to sediment delivery. 



The risk of sediment delivery in the proposed project area would be reduced from current levels. 

 Improvement of surface drainage and erosion control on the existing road system would lower the 

 long-term risk of sediment loading to live streams or Swan River. 



AIR QUALITY: 



What pollutants or particulate would be produced? Identify air quality regulations or zones (e.g. 

 Class I air shed) the project would influence. Identify cumulative effects to air quality. 



INTRODUCTION 



The project is within Montana Airshed 2 and is not within a Class 1 Airshed. Air quality within this 

 airshed is considered good. Temporary, local reductions in air quality currently occur from wildfires, 

 prescribed broadcast burns, slash burning, and road dust. 



Direct and Indirect Effects 



• J\i»-JlC110J\ JlLTERJM^ITIVE 



The existing condition would not change. 



• JlCTiOM JltjTEItJ\JlTiVE 



Postharvest burning would produce smoke emissions; log hauling and other project-related 

 traffic on dirt roads would temporarily increase road dust during dry periods. Due to the 

 relatively small size of the project, no temporary increases are expected to exceed standards or 

 impact local population centers if burning is completed within the requirements imposed by the 

 Montana Airshed Group and logs are hauled primarily during winter months as planned. 



Cumulative Effects 



The existing condition would not change. 



Page CEA-10 Checklist Environmental Assessment 



