United States Air Force

United States Navy

United States Coast Guard

United States Army Corps of Engineers

NASA

Louisiana D.O.T.

Mississippi State Highway D.O.T.

Oklahoma D.O.T.

South Carolina D.O.T.

Texas D.O.T.

Washington State D.O.T.

City of Corpus Christi, Texas

City of Galveston, Texas

City of Port Aransas, Texas

Port of Brownsville Authority

Port of Corpus Christi Authority

Port of Houston Authority

Texas A&M University

The University of Texas

Chevron, USA

Dow Chemical USA

Exxon Pipeline Company

Fina Oil & Chemical Company

Gulf Oil Corporation

Mobil Pipeline Company

AEP—Central Power & Light

Southwestern Bell

King Ranch, Inc.