Poe Spiral Case

Manhole entrance into spiral case. Poe Powerhouse, Sept. 1961.
Manhole entrance into spiral case. Poe Powerhouse, Sept. 1961.
PGE - 001
Inside spiral case, showing entrance to relief valve. Sept. 1961
Inside spiral case. Stay vanes in speed ring. Wicket gates can be seen in stay valve.
Inside spiral case. Stay vanes in speed ring. Wicket gates can be seen in stay valve. Sept. 1961
Poe Relief Valve Inlet. Looking into spiral case and stay vanes.
Poe Relief Valve Inlet. Looking into spiral case and stay vanes.