RAPID CITY, S.D. – Interstate Engineering announced that it acquired TerraSite Design, a civil engineering, landscape architecture, and planning company located in Rapid City, South Dakota. This acquisition represents a key step in Interstate Engineering’s strategic growth across South Dakota, building upon its established office in Spearfish, a release states.

“After 49 years of business, I’m grateful for our hard-working and dedicated employee owners who enthusiastically serve our clients every day. This acquisition fits perfectly with our strategy of focusing on the South Dakota market in the Great Plains region,” said CEO Lonni Fleck, Interstate Engineering. “Rapid City is one of the fastest-growing cities in the Midwest, and with this growth, there will be a continued need for civil

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