Palm Beach Manhole Rehabilitation

Infiltration quickly remediated on Florida brick manhole in busy traffic intersection

SITUATION

Master Lift Station 13A in Manatee County, FL was in need of rehabilitation due to heavy deterioration of its walls and high levels of dA sanitary manhole at the intersection of North Lake Way and Mockingbird Trail in the Town of Palm Beach, Fla., was a heavily deteriorated brick structure exhibiting the presence of groundwater infiltration. Additionally, the bench and the inverts were compromised due to wastewater traffic. With one additional service feeding the manhole, the structure was consistently surcharged. The city was looking for structural rehabilitation and a fast return to service. SAK Construction, LLC of Palmetto, Fla., a Sprayroq Certified Partner, turned to SprayWall to solve the problem.ebris that was causing the overuse of pumps. The 8 foot high level of debris included buckets and bricks. Upon initial inspection of the lift station, National Pipe Services confirmed that the major task for a successful rehabilitation would be the complete removal of all of the debris and setting up the scaffolding to reach the top of the structure’s 20 foot high walls.

SOLUTION

As a standard procedure, the manhole was pressure washed at 3,000 PSI to remove debris. SAK prepared the structure, utilizing a hydraulic cementitious mortar to provide a smooth substrate vital to the successful adhesion of Spraywall Urethane Coating. Please note that new bench and trough structures were created to ensure a smooth transitional channel for the existing inflow and effluent flow.

SAK then addressed the inflow and infiltration (I/I) by strategically drilling a one-inch hole at the point of intrusion, and pumped in acrylamide grout material with a topcoat of IPA Systems Octoplug mortar. After the structure had been suitably prepared, SAK’s certified Sprayroq applicators then applied SprayWall to the entire structure at a thickness of 125 mils.

RESULTS

The entire manhole is structurally rehabilitated, leaving the owner with a monolithic, corrosion- and abrasion-resistant surface. The interior walls are rigid enough to make typical maintenance tasks such as lowering a vacuum truck tube inside possible, without the worry of damaging the manhole’s interior. If one were to drop a sharp object such as a chisel or manhole hook, you can rest assured the urethane coating will withstand the accidental abuse.