IMGP0749.JPG Manometer

"Oregon visit"

 

Oregon "United States"

 

Cascadia "Pacific Northwest" "Cascade Range"

 

"Columbia River Gorge"

 

"Multnomah County"

 

"sunny and clear" spring

 

"late afternoon"

 

outing sightseeing

 

"US 30" "US30" "Bonneville Lock and Dam" "US Army Corps of Engineers"

 

"facility tour" "Powerhouse 1" "hydroelectric power" "New Deal era" "Great Depression" "display gallery" history museum "electrical measuring instruments" "manometer" "U-tube"

Done