Looking for a sinkhole investigation in Plum, PA? Describe your project once and up to three geotechnical engineers who work in Plum and Allegheny County get back to you with a quote. It's free and there is no obligation.
Plum is home to about 26,420 people (2024 Census Bureau estimate), a shrinking community (−2.7% since 2020). With 925 people per sq mi, it is a semi-rural area. Karst geology makes sinkhole activity a real concern for some properties here.
Plum at a glance
- Population (Census Bureau estimate, 2024)
- 26,420 (−2.7% since 2020)
- Rank in Pennsylvania
- 22nd of 1,013 cities and towns
- Land area
- 29 sq mi
- Population density
- 925 people per sq mi (semi-rural)
- Type
- Borough (Plum borough)
- Main county
- Allegheny County
What to check before hiring in Plum
- License: in Pennsylvania, investigations are signed by a licensed engineer or geologist.
- Insurance: read your policy's sinkhole and ground collapse wording before you file.
- Report: ask for radar results, boring logs and clear conclusions.
- Price drivers: site size, number of borings and testing.
Useful official resources
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USGS: sinkholes
Official information and guidance.
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Florida Office of Insurance Regulation
Official information and guidance.
Services available in Plum
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Sinkhole investigation
Geotechnical investigation with ground penetrating radar and borings, and an engineer's report.
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Sinkhole repair design
Engineering design and oversight of grouting or underpinning repairs.
Frequently asked questions in Plum
How much does a sinkhole investigation cost in Plum, PA?
It depends on the site and the testing. Describe your property: engineers who serve Plum reply with a quote.
How long does it take?
Often a few weeks including field work and report.
Can a sinkhole be repaired?
Often yes, by grouting or underpinning designed by an engineer.
Which geotechnical engineers will contact me?
Up to three independent geotechnical engineers who serve Plum and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.