Tuesday, November 14, 2023

1939 High Street Bridge over Tidal Canal at Alameda, CA

(Bridge Hunter broke Mar 22, 2023; Historic Bridges; Satellite)

Street (actually, river) View, Nov 2014

It struck me that 1939 is rather late to be using a Phase I Chicago Trunnion Design. Historic Bridges concurs.
"The through truss design might be explained by the noteworthy length of the bascule span, which would require trusses with somewhat more depth than those in Chicago. Along with the Park Street Bridge in Alameda, this is the longest bascule span in California....The bridge opens about 1,400 times per year. The bridge is powered by 75hp electric motors. An emergency 5hp motor is available and can be used under emergency power. The bridge when fully opened is at 75 degrees, but for most openings the bridge is raised to 45 degrees. In 1981 machinery and electrical equipment was rehabilitated, and in 1996 the bridge was completely repainted which included lead paint removal." The main span is 295' (90m). [HistoricBridges]

Robert Silva posted
Claude McGehee: Very nice. Where is that located?
Robert Silva: Claude McGehee Alameda, CA. It's a island city in the Bay Area with 5 drawbridges and one vertical lift. I've been a Bridge Tender here for 15yrs and I love the job. I agree nice photo.

Dennis DeBruler commented on Robert's comment
Given that the rack is above the street level and it is not green, I presume it is the High Street Bridge, https://maps.app.goo.gl/9itCpi8qdi8eLDLd9
Robert Silva: Dennis DeBruler very true

HistoricBridges talks about the patented guard rails.
Street View, Dec 2022


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