Manhole Leak Repairs — Tavistock Community Centre

Confined space tripod and retrieval system set up over a manhole at the Tavistock Community Centre
Client / Owner
ConCast Pipe (precast manufacturer)
Location
Tavistock, Ontario
Service
Groundwater Control & Mitigation

The problem. A manhole serving the Tavistock Community Centre had active water inflows at both pipe laterals. At the downstream lateral, the pipe boot had let go entirely, letting groundwater and loose material into the structure; the upstream lateral was actively leaking as well. Left alone, inflows like these wash fines out of the surrounding bedding and open voids around the structure.

The repair. We injection-grouted both laterals, cutting off the active inflows at the failed boot and the upstream leak. The grouting stabilized the loose material around the penetrations and closed the pathways before open voids could develop around the manhole.

The result. Both laterals were sealed and finished clean, active infiltration was stopped, and the surrounding ground was stabilized — a small, early repair that prevented the settlement problems a failed boot eventually causes. (SG Services reference #70-15-11-2342.)

Project photos

Leaking pipe penetration in a precast manhole before injection grouting
Before — water and fines entering around the pipe penetration.
Injection packers and pump lines at a manhole pipe penetration during resin injection
During — packers installed and resin injected around the penetration.
Sealed pipe penetration in a precast manhole after injection grouting
After — penetration sealed and finished.
SG Services crew preparing injection equipment beside a manhole on an open construction site
Crew staging equipment at the manhole on site.

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