Landslide closes Pleasantville Road in Harrison Township
Part of a state road in Harrison remains closed because of a landslide and experts expect continuing rain and the return of the freeze-thaw cycle will likely cause many more landslides across the Alle-Kiski Valley.
PennDOT closed Pleasantville Road, between Burtner Road and Juniata Street, early Thursday because of a rock fall. Although one lane was cleared, PennDOT is restricting traffic because there is the potential for more rock falls.
“Work will be scheduled to remove the material as soon as possible,” PennDOT spokesman Jim Struzzi said Thursday afternoon.Slides generally happen more often in Southwestern Pennsylvania than in other parts of the state, said Helen L. Delano, senior geologic scientist for the Pennsylvania Geological Survey.
So it's not surprising that landslides have been cropping up the past few days after more than 4 inches of rain fell over much of the region since Saturday.
And when temperatures begin to regularly drop below freezing at night but rise into the upper 30s and 40s during the day, water that has seeped into cracks in rocks will freeze, expand and thaw again.
“That causes landslides and rock falls,” Delano said.
Alicia Kavulic, manager of PennDOT District 10's geotechnical unit, said clay is often a factor, too.
Add steep hills and the region is “in the bull's-eye for slides,” said Randy Bookshar, a geography instructor at Penn State New Kensington.He said fixes are expensive, from attaching a chain link fence attached to an unstable hillside, bolting rocks together, to regrading a hillside.
The most massive, persistent and expensive to fix rock slide area in the Alle-Kiski Valley was along the Route 28 expressway just south of the Harmar exit (Exit 11). Four years ago, PennDOT spent $8.5 million to stabilize the hillside, install a fence to catch falling rocks in a drop zone and shift the roadway away from the steep hill.
And still, rocks continue to fall, most notably in August 2011 when a 300-pound boulder struck a Lower Burrell man's car.Last summer, PennDOT scheduled 19 slide repairs in Allegheny County alone because of 2011 storms, Struzzi said.
PennDOT District 12, which includes Westmoreland, Washington, Greene and Fayette counties, has the largest number of slides in the state, according to spokeswoman Valerie Petersen.
Accordingly, it spends the most annually to repair landslides — about $1.7 million.
Keeping up with them can be difficult. About two-thirds of the 84 embankment failures in District 12 will be under contract or repaired by the end of next June, she said.
Slides of another type have bedeviled PennDOT in Armstrong County.Two slides closed Margaret Road off Route 422, said PennDOT spokeswoman Deborah L. Casadei.
“Here, the slides were under the road and we had to close the road for several days,” she said.
It took about $260,000 to fix those problems, officials said.
Chuck Biedka is a staff writer for Trib Total Media.
Show commenting policy
TribLive commenting policy
You are solely responsible for your comments and by using TribLive.com you agree to our Terms of Service.
We moderate comments. Our goal is to provide substantive commentary for a general readership. By screening submissions, we provide a space where readers can share intelligent and informed commentary that enhances the quality of our news and information.
While most comments will be posted if they are on-topic and not abusive, moderating decisions are subjective. We will make them as carefully and consistently as we can. Because of the volume of reader comments, we cannot review individual moderation decisions with readers.
We value thoughtful comments representing a range of views that make their point quickly and politely. We make an effort to protect discussions from repeated comments either by the same reader or different readers.
We follow the same standards for taste as the daily newspaper. A few things we won't tolerate: personal attacks, obscenity, vulgarity, profanity (including expletives and letters followed by dashes), commercial promotion, impersonations, incoherence, proselytizing and SHOUTING. Don't include URLs to Web sites.
We do not edit comments. They are either approved or deleted. We reserve the right to edit a comment that is quoted or excerpted in an article. In this case, we may fix spelling and punctuation.
We welcome strong opinions and criticism of our work, but we don't want comments to become bogged down with discussions of our policies and we will moderate accordingly.
We appreciate it when readers and people quoted in articles or blog posts point out errors of fact or emphasis and will investigate all assertions. But these suggestions should be sent via e-mail. To avoid distracting other readers, we won't publish comments that suggest a correction. Instead, corrections will be made in a blog post or in an article.
- Penguins slip past Sharks, 3-2, in shootout
- Hempfield infant fights rare disease
- Lower Burrell family opens home to old-fashioned Easter egg hunt
- New Kensington resident looks to transform city
- Henry: Yough River Trail Council races set for Saturday
- NFL coaches weigh in on Polamalu’s legacy
- Retiring Arnold, Lower Burrell mayors look back with contrasting views
- Sex-soaked culture faulted for fraternity house parties
- Pirates’ outfield may have few defensive peers
- Arab nations unite to quell region’s armed insurgencies
- Aspinwall searches for new police chief