National Stone, Sand & Gravel Association (NSSGA)
Garrison Dennis has extensive experience in the aggregates and industrial minerals industry, holding key positions in various organizations since 1977. Currently serving as a Board Member for Washington Court House City Schools, Garrison is also a member of the Executive Committee for the National Stone, Sand & Gravel Association. Garrison has held multiple leadership roles in the Ohio Aggregates and Industrial Minerals Association, including Chairman of the Finance Committee and past President. Additional experience includes serving on boards for the Indiana Mineral Aggregates Association and the Indiana Environmental Stewardship Council. Garrison Dennis earned a Bachelor's degree in Economics from Wilmington College (OH) in 1977.
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National Stone, Sand & Gravel Association (NSSGA)
The National Stone, Sand and Gravel Association represents the crushed stone, sand and gravel (or construction aggregates) industries. Our member companies produce more than 90 percent of the crushed stone and 70 percent of the sand and gravel consumed annually in the United States.