Large Diameter Sanitary Sewer Lining (Phase I)
In 2017 the City of Sylvania commissioned a conditions assessment for all sanitary sewers 18” through 42” in size within the City of Sylvania Sanitary Sewer District. Much of this large diameter collection system was installed in the 1970’s when the City switched treatment plants from the City of Toledo to Lucas County. This assessment included field reconnaissance to determine pipe condition, sediment deposits, corrosion levels, and visible defects in the nearly 50-year old system.
Based on the results of the assessment the City is ready to begin improvements to rehabilitate specific areas of the collection system. Phase 1 of a multi-phased program will focus on the gravity collection system downstream from our Monroe Street and Sylvania Avenue pumping stations. These sewers range from 24” to 42” in size and lie under McCord Road from Central Avenue to Sylvania Avenue and under Sylvania Avenue from Franklin Drive to US-23. These areas have been particularly hardest hit by corrosive hydrogen sulfide (H2S) gases where turbulent forced-flow switches to steady-state gravity flow.
Phase 1 rehabilitation will include sewer lining by cured-in-place pipe (CIPP) method. CIPP lining is a method of trenchless rehabilitation whereby a textile liner tube is coated with an epoxy-based resin mixture and inverted into the pipe wall with air pressure. The liner tube is then steam-cured in place which causes the resin to harden. The finished product is a fitted and smooth-walled pipe that is corrosion resistant. Once cured, active service laterals are reinstated by a remotely controlled robotic cutting device.
In addition to the sewer lining select manholes in the Phase 1 system will also be lined using a different process (polymeric spray on coating). This is a two-part process that fills any cracks and voids in the manhole with a polyurethane foam and then coats the inside part of the structure with a silicone barrier that is corrosion resistant.
The following videos provide additional background information on both of these processes:
Overall, the Phase 1 project will include the lining of just under 4,800 feet of sewer and over 230 vertical feet of manholes. Work is scheduled to commence in August 2021 and should take 2 to 3 months to complete. The City has awarded the Phase 1 contract to Visu-Sewer, Inc., headquartered in Pewaukee, Wisconsin, in the amount of $1,092,744. 49% of the project is funded by a grant from the Ohio Public Works Commission (OPWC).
For any additional questions or comments please contact the City of Sylvania Department of Public Service at 419-885-8965 or by email to the Deputy Director of Public Service, Joe Shaw, at email@example.com.
Project Limit Maps: Click here
Project Impact Maps: Click here
Central Avenue Closure: Click here