Cathy W. Dougherty, PE, CRS, CAPM
President, Principal Engineer
Rowlett, TX
972-412-8666 x122
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John T. Dougherty
Senior Project Manager
Rowlett, TX
972-412-8666 x127
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Charles W. Sprague, PG
Senior Hydrogeologist
Rowlett, TX
972-412-8666 x121
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Paul W. Heidgerd, PG
Sr. Geologist, Asbestos Individual Consultant
Rowlett, TX
972-412-8666 x126
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Dallas Headquarters

P.O. Box 584
Rowlett, Texas 75030-0584
Phone: 972-412-8666
Fax: 972-412-8660