City of Laconia Public Works Department
Main Street Bridge Construction
The existing Main St. Bridge is actually made up of 3 bridge spans. The center span which carries Main St. across the Winnipesaukee River was last upgraded in 1970. The two "wing" spans (Beacon St. East and Beacon St. West) were built in 1968 as part of the Laconia Urban Renewal Project that was underway at that time.
Bi-annual state inspection of the bridge revealed in 2004 that the bridge deck on all 3 spans was exhibiting signs of deterioration due to the impacts of the elements (drainage through expansion joints and penetration of sodium chloride into the concrete) over the course of the previous 35 years.
With support from State DOT, Laconia applied in 2006 for State Aid Bridge Funds to upgrade the bridge decks. State funding became available to us in 2010 and a thorough "Bridge Study" was accomplished through the services of a qualified bridge engineering consultant, Dubois & King, Inc. The full Bridge Study, the design of a deck replacement and project bidding were accomplished between 2010 and 2013. Bids received in early 2013 revealed costs that exceeded available State and City Funds.
Working in cooperation with State DOT and Federal Highway funding programs, Laconia was approved for re-bidding of the project in late 2013 with assurance of State and Federal funds to assist local dollars to accomplish the project. Bids received in December 2013 were within available funding limits and the project was awarded to R. M. Piper, Inc. of Plymouth N.H. in February of 2014.
The Bridge Rehabilitation Project is now scheduled for construction starting in March of 2014 with anticipated substantial completion in August of 2015. The full plan set is located here: Planset
The construction will occur in four (4) phases. Please click the active phase below for more information on that phase of construction. In addition, the public is invited to join the construction team at their monthly meetings the first Wednesday of each month at 8:00 AM in room 200A. Minutes of the meetings are available here: Minutes.