About 4,100 gallons of sewage overflowed near Trinity Hospital on Tuesday.
The spill occurred about 10 a.m. and was fixed by 4:50 p.m. The sewage overflowed from a manhole in Trinity’s rear parking lot and affected water in a storm drain that flows into the Oates Creek Basin.
The cause of the overflow was an accumulation of grease in the sewage collection line, said Russell Thies, the assistant director for distribution and collection at the Augusta Utilities Department. The grease backup was likely caused by a restaurant inside Trinity, he said.
“We’ve had some challenges over there in past recent years,” Thies said.
More than 50 percent of sewage spills are related to grease accumulations, he said. Hot grease poured down a drain solidifies in the sewer system.
No drinking water supplies were affected by the spill, Thies said.