Problem: Mishawaka, Indiana, was removing and replacing existing pipelines and manholes in a densely populated area of the city. Conco Spray Solutions was subcontracted to rehabilitate the manholes. Conco President Jennifer Hoop believed Sprayroq could be of great benefit and wanted to prove it though a demonstration. Hoop proposed that the city allow Conco to apply polyurethane lining material to one manhole scheduled for demolition, to demonstrate its strength and structural rehabilitation properties. 

Solution: Conco was allotted a manhole with severe structural issues, inflow and infiltration. Following two hours of light prelining prep work, the old brick manhole received a 250-mil lining of Sprayroq SprayWall structural polyurethane, completed in a single pass in one hour. The manhole was returned to service immediately after the invert was sprayed.

Result: The city was impressed with the speed and application of the product, and its ability to provide savings in the quick return to service and true structural properties. Mishawaka recognized its viability for future rehabilitation and protection projects. During the manhole demolition, an excavator with an operating weight of approximately 65,000 pounds, ground pressure around 8.82 psi and bucket breakout pressure of 39,000 psi was used to subject the manhole to multiple hits. Even after this — with its brick structure crumbling — the lining material inside stood strong. 

205-957-0020; www.sprayroq.com