The main interceptor carrying wastewater to the MCUA treatment plant in Middlesex County, New Jersey was built in the 1950s and had never been inspected. The interceptor is approximately 60,000 feet long and is built of RCP and corrugated metal. The interceptor ranges in size from 18 inches to 84 inches in diameter and includes three double-barrel inverted siphons under river crossings.

Savin conducted a video inspection of the interceptor to evaluate the physical condition of the pipes. Some of the challenges that Savin had to overcome were as follows:

--ventilation – ventilation is poor because the interceptor is relatively deep and the manholes are far apart. Savin used industrial fans to create proper ventilation and carried air packs during the walk-through inspection.
--high flows – normal dry weather flows were up to 60 inches deep in places. Savin built a series of bulkheads and diverted the wastewater to a parallel relief sewer so that the interior of the pipes could be inspected.
--surcharge conditions – Savin had to pump down 5,000 feet of 72-inch line that was surcharged upstream of the siphons under the Washington Canal.