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The JHA engineering team is licensed in multiple states and has extensive experience in the planning, design, permitting, and managing of land development, infrastructure, and water resource projects. Led by Carl Cook, a licensed surveyor with over 25 years experience in the industry, the JHA survey team has capabilities ranging from boundary surveys to construction layout to detailed topographic surveys.

JHA Environmental & JHA Remediation provide environmental remediation and site services for the planning, management, and expert implementation of assessment, remediation, monitoring, and construction projects.
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Our mission is to deliver quality-a word that describes the grade of our work, and also the character of how we go about it. A foundation for success isn't just planted in the ground; we know it's anchored in a relationship-one built on trust. We take pride in our work: not from completing a project, but from delivering a site that will work for decades to come, regardless the tests of weather and time. As handed down to us by our founders, the spirit of JHA is about building for the long-term-about building to last.
The JHA team is comprised of experienced professionals and field technicians who work closely together on all projects. JHA's projects are all overseen by experienced project managers who each have extensive hands-on experience performing the work that they manage. Our Project Managers are licensed Professional Engineers that are not only experts in their field, but well versed in the processing of engineering drawings and documents through the local, county, state, and federal approval processes.
Jacob & Hefner Associates, Inc. (JHA) is a civil engineering, land surveying, and environmental services firm with offices in Illinois, California, Georgia, Texas, and Washington. JHA's civil engineering and land surveying divisions were established in 1996 by Jeff Jacob and John Hefner. Our firm provides civil engineering, transportation and municipal engineering, water resources engineering, land surveying, mapping, and environmental remediation implementation, operation, maintenance, monitoring, construction and Phase I and II due diligence services.
Civil engineering services are the foundation of our company. Since 1996 we have been providing civil, transportation, municipal, and water resources engineering to a variety of dedicated clients including land development firms, real estate investment trusts, corporate real estate departments, villages, municipalities, state agencies, and other private and public entities.
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