Quantum Construction Consultants, LLC

Old North Branch Road
over North Branch River
NHDOT Br. 130/149
Antrim, New Hampshire

 

 

 

 

 

 

 

 

 

Old North Branch Road over North Branch River was a critically deficient, 26-foot wide by 44-foot span, steel bridge with a corrugated steel and concrete deck founded on abutments constructed of dry laid cut stone and rubble masonry. The bridge was closed in September 2008 due to the severe deterioration of all bridge components and abutment scour.

Quantum Construction Consultants, LLC designed a 30-foot wide by 80-foot long steel plate-girder bridge founded on cast-in-place concrete abutments as a replacement structure. The bridge was lengthened to relocate the abutments outside of the main river channel, thereby reducing stream velocity and improving the hydraulic capacity at the bridge. This project is funded by the Town of Antrim, Federal Highway Administration (ARRA), and New Hampshire Department of Transportation. Construction is anticipated to be complete in Fall 2010.