Springfield's rehabilitation of egg-shaped Brick Sewer

The Springfield Water and Sewer Commission (SWSC) is conducting a collection system assessment program of its combined wastewater collection system within the city of Springfield, Mass. This involves performing National Association of Sewer Service Companies' (NASSCO) inspections of collection system assets and inserting that data into a risk and criticality model. This model indicated that the sewer main within Pine Street, between Maple Street and Central Street, was in failure mode and highly ranked in criticality to the collection system as well as risk associated with failure. This section of 1.60-meters-high by 1.07-meters-wide (63-inch-high by 42-inch-wide) egg-shaped brick combined sewer was constructed in 1882, is 408 meters (1,340 feet) long and has an average depth of about 14 feet to invert. In March 2011, SWSC began to review information, collect supplemental information, evaluate viable alternatives, and design the replacement or rehabilitation of the Pine Street combined sewer.