Thursday, November 21, 2013
Switched at drafting? I want to know which will be the first to ever be built?
and is there some rule these things always have to be in watercolor?
I just have one real question... who 'owns' these notional structures when they need repaired? The city? County? State? Maybe some one-off Bridge Authority we can create? Can't be cheap to maintain and remember we can't even afford the most basic of preventative maintenance on a lot of our bridges. Remember the rocker bearing failure on the relatively modern Birmingham Bridge just recently? Might have been prevented if they had been lubricated. Ok, maybe not modern, but certainly one of the youngest bridges we have in use.
To be fair, the top picture from the early 1960s is not only architecturally improbable at this point, but likely incompatible with Coast Guard navigation rules for bridge height on any new spans over our rivers. The latter structure? Seems to be in play at least as of this evening.