The Steel Valley Trail Council is awaiting engineering reports before deciding how to deal with a landslide along the Great Allegheny Passage near Kennywood Park.
The June 29 slide brought earth, rocks and trees down across the trail, temporarily blocking it. Volunteers cleared enough of the material to reopen it but part of the trail remains blocked.
"We had cleared as much as amateurs can," trail council vice president Bob MacGregor said. The hillside "appears stable now," he said.
The slide covered about 100 linear feet of the trail and has been marked with yellow caution tape.
"None at all," Mr. MacGregor said when asked if he had an estimate of the cost of clearing the slide and shoring up the hillside.
There have been several slides on the trail section between Grant Avenue in Duquesne and The Waterfront, which opened in 2011.
Volunteers responded "magnificently" to the latest one, Mr. MacGregor said. Two brought hand tools, two brought chain saws and more arrived with shovels. To his delight, passing cyclists stopped and grabbed shovels and joined the effort, he said.
Three engineering firms have been asked to provide estimates for clearing the slide.
The Steel Valley section sustained other damage during the July 10 deluge that caused widespread flooding in the district, including downed trees and washouts, Mr. MacGregor said, but volunteers cleaned that up quickly.
Linda Boxx, president of the Allegheny Trail Alliance, said the season's rainy weather has caused other problems along the Great Allegheny Passage, which goes from Pittsburgh to Cumberland, Md. Other slides occurred north of Dravo Cemetery in Elizabeth Township, between Ohiopyle and Connellsville and at Pinkerton Horn in Somerset County, she said.
"They were all serious enough to impede and/or temporarily close the trail, but in all locations the trail is passable. Our 'chain gangs' have been busy!" she said in an email.