Backshophoss wrote: ↑Mon May 11, 2020 8:55 pm Walk is a pivot span,to become a vertical lift span bridge, might become the "Prototype" for MN's New Haven line bridges.Mr. Backshop, "I'll raise you".
I think the standard for the Corridor should be a fixed bridge over any navigable waterway with MHW clearance to satisfy whichever "Navy" - Fairfield or US, is the party in interest.
If the Fairfield varietal has "leaned on whoever" - and they can - to ensure whatever number of bridge openings per period of time, and thus limit the number of trains Amtrak and the commuter agencies can operate, are allowed, then no surprise, "someone knows someone".
Now the US varietal has National Security working for it. The highway bridge, whatever it's named, X-ing the Thames at New London, was built, pre-WWII with 135ft MHW clearance. Somebody was thinking forward; now when Amtrak gets funding to rebuild their bridge, it too should have like clearance. NIMBYS, sorry 'bout that - National Security.
The Fairfield Navy now has a substantial "Base" - aka a Marina - upstream on the Mianus (back in my day, a boatyard and a sailmaker was all). So should the inevitable bridge replacement have same 45ft MHW clearance as the Morano.
At Norwalk, I defer to others; both regarding Fairfield Navy upstream Bases and clout.