1 Jetty "A" 



3 Interstate bridge 



- 



ASIOBIA 

 oatcON 



WASHINGTON 



SHIP CHAN 



--• - Trawl Tow 

 O - Puru Seine Set 



o - Bonthic Invertebrate/ 

 Sediment Core 



2 Tansy Point 



4 Tongue Point 



?^ 









Jv 



"«»»"« .£^r 





Figure 1. — The Columbia River estuary with the sampling effort shown for 

 the four hydraulic scour sites. 



438 



