On the way to a job site, a township employee noticed what appeared to be wastewater seeping from a sanitary sewer manhole on Lincoln Street, near the Grand Haven Golf Club, at about 8:20 a.m. They said the manhole was filled to the top with wastewater.
Further investigation revealed additional manholes were also filled to the top, although no discharge had occurred at these locations.
An environmental services and waste disposal company was contacted within a few minutes, and a vacuum truck was on the scene shortly after 9 a.m. The manhole was vacuumed, stopping the sewerage overflow.
The sanitary sewer system was returned to normal operations by 9:30 a.m., Township Public Services Director Mark VerBerkmoes said.
Less than 10 gallons of wastewater was released onto the pavement and flowed into a large, grassy area near the manhole, VerBerkmoes said. A township crew used about 2,000 gallons of clean water to further dissipate the overflow, enabling the waste that did escape to disperse into a larger section of the grass.
State and county health agencies were notified of the event, but township staff said they don't think there was any impact to any surface or water.
“The public was not placed at any risk during this overflow and township staff are investigating to determine the cause," VerBerkmoes said.