Evaluation of Historical Sediment Deposition 



«Insert Figure B-3» 



1990' 



1980- 



1970H 

 Fire — 

 Flood — 



Road paved- 



1960 



1950- 



Fire — 

 Initial road completed — ■ 



1940- 



1930- 



Fire- 



Road construction begins — 



1920- 



1910- 

 1900 



Flood — 



1890- 



1880 



10 



20 



30 

 _i 



40 



Lake McDonald 



— r- 



30 



10 20 



Mean Sedimentation Rate 

 ,2 



' — I 



40 



(mg/cm'^/yr) 



Figure B-3. Mean sediment accumulation rates in Lake McDonald over the last 135 years. 



Flathead Basin Cooperative Program Final Report 



Page 33 



