- The Belhaven Group, Inc. Est. 1987 415 N. Quay, Bldg. B Kennewick, WA 99336 (509) 735-9446 FAX (509) 735-3733 E-Mail: wtb@belhaven.com President: W. Thomas Bayha The Belhaven Group of Companies: Belhaven Applied Technologies UL Control Panels Field Calibration Bench Calibration Board-level Design Systems Integration Engineering & Consulting One World Telecommunications Internet & Digital ...www.owt.com/belhaven