A timeline as best I can do it...
The City of Boston was to demolish the bridge once the Evelyn Moakley Bridge was completed. That was in the legislation for the bridge.
In early 1999, opposed by Congressman Moakley, the City of Boston issued an RFP to find a developer willing to propose a commercial project on the bridge that would help pay for its rehabilitation.
A half-dozen proposals came forward including ones (as I recall) them: Beal Company (glass market), Forest City Enterprises (galleria mall on bridge) and Architectural Heritage Foundation (glass museum).
The BRA awarded the project to Forest City Enterprises. That particular proposal was roundly slammed for its crassness, memorably by a Boston Globe Editorial. But, in fairness, it may have also been seen as the most economically viable at the time.
In late 1999, the Boston Landmarks Commission voted unanimously to designate the bridge as a Boston Landmark. Something was afoot, and demolition entered conversations once again.
Within a month after BLC designation as a Landmark, in January 2000 Mayor Menino vetoed the BLC designation and Forest City Enterprises withdrew its awarded bid to redevelop the bridge. If I were to guess, I'd say this reversal by the City of Boston might have been due to some pressure by Congressman Moakley. Not sure.
Congressman Joe Moakley passed away on May 28, 2001.
No action between 2000-2003. What we heard was that there were no funds available to demolish the bridge.
Around 2003, in part due to A) advocacy by preservation community, B) lack of demolition funds and C) support for continued use as a pedestrian overpass by some high-ranking folks at the Federal Courthouse, the City of Boston announced it would support continued use of the bridge as a pedestrian overpass. Some funds were budgeted for some stabilization.
Since 2003, I don't think substantial funds have been allocated to upgrade or maintain the bridge beyond current level of stabilization, and operability by boaters on call.
As for the tender house, about 5 years ago the front either caught fire or fell into the pilings, so that portion was removed and the remaining section was stabilized.
In 2010, the BRA posted a document online titled, "
Bridge Restoration Project Announcement – November 14, 2008" including a conceptual rendering of a possible bridge redevelopment. (I don't have any recollection or record of ANY such announcement being made publicly in 2008 or thereafter for a public or private plan.)
Through 2012, Fort Point bridges have been targeted to receive public funds and private payments by Fort Point and Seaport property owners. Atlantic Wharf (Boston Properties) was required to pay $2m toward capital improvements and programming, including the dock and $500,000 for rehabilitation and maintenance of historic lights on the Congress Street Bridge.
But, as far as I can tell, the Old Northern Avenue Bridge or tender house is not being identified as a target of funds now coming online for Fort Point capital improvements. So I'd suggest the fate of the bridge remains unknown.
EDIT: Added the date of Congressman Moakley's passing.
EDIT: Added the 2010 BRA entry, thanks to a post by DirtyWater
EDIT: Added 2012 Update