SGI in Hagerstown celebrates anniversary of Pa. facility

SGI in Hagerstown celebrates anniversary of Pa. facility

SGI celebrates 100th anniversary of Pennsylvania plant

SGI’s Charmian plant near Blue Ridge Summit, Pennsylvania, has been a mining operation to support the roofing industry for 100 years.

Although the company has not owned the site throughout its entire history, the company recently celebrated the 100th anniversary of the Charmian plant, honoring the importance it has played in manufacturing roofing products since 1923, according to an SGI news release.

SGI's Charmian plant near Blue Ridge Summit, Pennsylvania, has been a mining operation to support the roofing industry for 100 years.  This photo shows miners at the site in the 1930s

“The site has previously conducted mining operations, but the material extracted has been used for other purposes,” Justin P. Dunlap, president of SGI, said in the statement. “It was only in 1923 that the site began quarrying rock there specifically for roofing.”

Mining activities at the site are believed to have begun in the late 19th century. The age of the rocks extracted at the Charmian plant today is estimated at about 820 million years, which were formed as a result of volcanic activity during major geological events that occurred during devastating periods of Earth’s history, according to the statement.

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