SYMPOSIA PAPER Published: 01 January 1991

Use of Stone Columns to Improve the Structural Performance of Coal Waste Deposits


The Gilberton Power Project, located in central Pennsylvania, makes use of waste anthracite coal, called culm, for fuel. The culm processing area is underlain by this culm, which is generally loose, and quite unsuitable to support the heavily-loaded processing equipment. Vibro-replacement stone columns were selected for ground modification. The stone columns were installed to various depths, depending on the size and loading of the structure. The paper describes the design and Installation of the vibro-replacement stone columns, difficulties encountered during installation and how these were overcome, and techniques used to confirm the effectiveness of the modified ground, including soil borings, plate load testing, and performance monitoring.

Author Information

Davie, JR
Young, LW
Lewis, MR
Swekosky, FJ
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Developed by Committee: D18
Pages: 116–130
DOI: 10.1520/STP25055S
ISBN-EB: 978-0-8031-5161-1
ISBN-13: 978-0-8031-1392-3