JD Hair & Associates, Inc. – Engineering Consulting
J. D. Hair & Associates (JDH&A) is a consulting firm and industry leader in the design of horizontal directionally drilled pipeline crossings.
JDH&A have been key members of design teams for some of the most significant and challenging pipeline projects ever completed. Their engineers are comfortable conducting surveys in the field, performing design in the office, monitoring construction at the job site, or presenting the results of a research project. The firm is based in Tulsa, OK, but work on projects throughout the world.
The firm’s objective is to focus creative engineering talent on projects involving the installation of buried utilities by horizontal directional drilling (HDD).
Since its founding in 1987, JDH&A has consulted on more than one thousand HDD crossings in locations ranging from Alaska to Australia. 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.