St. Louis Southwestern Railway Company
The Atchison, Topeka & Stana Fe Railway Company
Missouri-Kansas-Texas Railroad Company
KPL Gas Service Company
Gulf Oil Corporation
Sun Oil Company
Williams Brothers Construction, Inc.
Kansas Department of Transporation
U.S. Army, Corps of Engineers
Boeing Aircraft Corporation
Tac-Work, Inc.
Monarch Cement Company
Kaiser Engineering
Kansas Gas & Electric
IT Corporation
Oklahoma Water Resources Board
Power Flame
Environmental Protection Agency
B.F. Goodrich
Vinita Airport Authority
Oklahoma Gas & Electric
Emerson Electric Corporation
Columbian Tec-Tank, Inc.
McNally Corporation
Yellow Freight Systems
Fort Howard Paper Company
Day & Zimmermann, Inc.
P.I.E.
Chevron Chemical Comapny
Sand Springs Railroad Company
Sun Graphics, Inc.
Pryor Industrial Park Authority
Oklahoma Cement Company
The Lee Corporation
Branco Enterprises, Inc.
Fina Oil Corporation
United Parcel Service
AT&T