Neponset River Bridge, US
Eliminator® system applied with ease despite freezing temperatures on Neponset River Bridge.
As Boston, the capital and commercial centre of Massachusetts continues to thrive and grow, the City’s infrastructure needs to develop apace to ensure traffic flow and maintain Boston’s reputation as a desirable place to live and work. Already much admired and appreciated by the city’s residents, improvements in Boston’s famous T Commuter Rail system operated by the Massachusetts Bay Transport Authority (MBTA) will play an important part in achieving this goal.
Massachusetts Bay Transport Authority (MBTA)
Centurion Waterproofing Inc.
- Neponset River Bridge, USA
The project included the building of new lines to meet increasing demand in new areas. One new line is the paradoxically named “Old Colony Line”, a commuter line which runs from Boston through the suburbs to South East Massachusetts. The ultimate aim is to carry the line to the picturesque Cape Cod area.
The line crosses the Neponset River as it approaches Boston. The MBTA appointed Sverdrup Consulting Engineers to design a bridge that would span this waterway, carry the two sets of railroad tracks and could be built within the project time frame. Sverdrup’s chosen design
was a 1,490m long, 7.5m wide steel plate deck structure.
One aspect of particular concern to both the owners and designers of the bridge was long term protection to the deck given the harsh New England winters and marine environment that the bridge would have to endure. Thus an exacting specification for the waterproofing was written.
The waterproofing system needed to ensure long term protection to the deck, evidenced by a strong track record, maintain or ideally speed up the projects time frame and be cost effective. Sverdrup and the Main Contractor, Modern Continental of Boston, had originally scheduled the
waterproofing work to be carried out in Spring, as they believed the cold temperatures likely to
be experienced in Boston would prevent the work being carried out until then.
However, Eliminator® can also be applied with deck temperatures below -5°C. The Eliminator®
membrane would offer the high quality cost effective membrane sought by Sverdrup while saving over three months on the project’s schedule. The waterproofing of the deck began in early January.