Toledo, Ohio

As part of the ongoing upgrade and maintenance of the City of Toledo water distribution system, ARCADIS has designed the replacement of 4,300 lineal feet of a major existing water main as part of the 72-Inch Superior Street Water Main Replacement project.

A new 72-inch prestressed concrete water main on Huron Street will replace an existing 72-inch steel water main along Magnolia, Superior and Walnut Streets. The steel water main was installed in 1941 and has experienced a number of main breaks in the past several years.

ARCADIS evaluated different water main routes for the City including paralleling the existing main or using a different route. Ultimately, a new more cost efficient route was chosen along Huron Street and the existing  
 
72-inch steel main will be abandoned in place. The new main will use prestressed concrete pressure main with connections to existing 60-inch and 48-inch feeder mains along the route.
Plans have also been developed for the replacement of streets along the entire project route with new pavement, curbs, ADA ramps, catch basins, and drainage conduits.
Services provided by ARCADIS include route surveys, the preliminary and final design, bidding assistance, traffic engineering and control, cost estimating, and as-built drawings. Construction along the project route will also involve tunneling and boring underneath existing pavement. ARCADIS is also providing construction assistance by attending progress meetings to answer questions regarding the project and reviewing change orders requested by the contractor.

Another firm under a subcontract to ARCADIS has completed a Phase I Environmental Impact Study on the project area. This study determined a Phase II Environmental Impact Study was not required.

The most challenging part of the project design has been to coordinate the live tapping of connecting water mains. For instance, an existing 60-inch steel water main needs to remain in service while a 42-inch connection is made. ARCADIS engineers used different computer models to determine which connections should be made first and how the order of these connections will affect flow to others areas of the water system. The connections are also being coordinated with connections being made as part of Phase I of the East Side Trunk Water Main project, which is also under construction.

The project is scheduled for completion in 2002 at an estimated construction cost of $4.7 million