East Side Trunk Sewer Improvements, City of Litchfield, Minnesota
Bolton & Menk's approach to the necessary infrastructure improvements allowed for multiple construction methods in order to solve the city's issues while minimizing disruptions to the public to the greatest extent possible.

East Side Trunk Sewer Improvements

City of Litchfield, Minnesota

The 4,400-foot segment of the city's east side interceptor was a 15-inch PVC truss pipe constructed in 1976. Despite the relatively young age of the interceptor, the pipe failed in several areas, forcing the city to make improvements.

Televising of the route revealed multiple inflow and infiltration (I&I) sources. In areas where the interceptor did not exhibit visible defects it was rehabilitated using cured-in-place pipe (CIPP) methods. This method resulted in significant cost and time savings, allowing rehabilitation without disturbing the street or underlying utilities. It also eliminated multiple I&I sources. In areas where the pipe had collapsed or exhibited visible cracking, a new 15-inch PVC interceptor required complete removal and reconstruction of the street and adjacent utilities. The replacement areas were in a heavy commercial district and along a county road, which required significant traffic control and coordination with local businesses to minimize construction impacts.

Bolton & Menk's approach to the necessary infrastructure improvements allowed for multiple construction methods in order to solve the city's issues while minimizing disruptions to the public to the greatest extent possible.