J. D. Hair & Associates is a consulting firm whose mission is to provide its clients with value through the artful application of technology. We are the industry leader in the design of horizontally directionally drilled pipeline crossings and have been key members of design teams for some of the most significant and challenging pipeline projects ever completed. Our engineers are comfortable conducting surveys in the field, performing design in the office, monitoring construction at the jobsite, or presenting the results of a research project. We are based in Tulsa, Oklahoma, but work on projects throughout the world.
Since its founding in 1987, JDH&A has consulted on more than one thousand HDD crossings in locations ranging from Alaska to Australia. Included among our clients, who have been located on every continent except Antarctica, are Fortune 500 energy companies, major international design and construction firms, local utilities, and HDD contractors.
JDH&A's leadership position in the specialized field of HDD crossing design is demonstrated by its experience. We invite you to take a few moments to review the selected projects presented on our website. We think you will agree that our firm's HDD design capabilities are unparalleled in the HDD Industry.