583 N.W.2d 155 DIAMOND SURFACE, INC., a corporation with its principal place of business at Maple Grove, Minnesota, Plaintiff and Appellant, v. The STATE CEMENT PLANT COMMISSION, a public corporation and agency operating the Cement Plant at Rapid City, South Dakota, Defendant and Appellee. Nos. 20112, 20124.Supreme Court of South Dakota.Argued June 2, 1998. Decided […]