ETTL has contributed environmental and engineering services to over 600 tower projects, including services during site selection phases as well as during tower foundation design and construction phases. Which is to say, ETTL can help you make sure (1) your tower will be built on a suitable site, (2) that its foundation will be designed in keeping with the subsurface realities of that site, and (3)that construction of the foundation will be carried out in accord with design specifications — in other words, help you avoid costly design and construction problems. (It's worth noting that these same services can be provided by ETTL for storage towers, hoppers and elevated bins of all types and sizes.)
(1) Engineering Assistance During the Site Selection Phase: ETTL can provide both geotechnical and environmental services during this phase. It can carry out geotechnical (as well as hydrogeological) studies, drawing on the services both of its fleet of subsurface exploratory vehicles and of its soil laboratories to generate needful data. The exploratory vehicles are also available to provide subsurface samples for analysis by the client's own geotechnical staff. In addition, ETTL is staffed and equipped to carry out Phase I and 
Phase II environmental site assessments (ESAs) for tower sites. A Phase I ESA will provide a comprehensive overview of the site and its environmental condition, helping you limit future liabilities. (At right, during an ESA, an ETTL investigator makes a photo record of an active oil well on a property abutting a prospective tower site.) A Phase II ESA, if deemed necessary, would be more detailed and might involve drilling for samples and the carrying out of analytical testing to define particular site problems and then establish what remedial actions and costs might be called for. ETTL also can conduct other ESA phases, including remediation. (ETTL's Geotechnical Engineering Services and Environmental Site Assessment (ESA) Services are described in considerable depth elsewhere in this web site. Click the underlines.)
(2) Engineering Assistance During the Foundation Design Phase: ETTL's professional 
geotechnical engineers, engineering geologists and other experts are on call to carry out foundation and earthwork studies, providing recommendations upon which support structure designs can be based. (Similar services also can be provided for access roads.) In addition to its fleet of drilling rigs, which can accommodate even the roughest terrains for field sampling, ETTL operates materials testing laboratories in both its Tyler headquarters complex and its Longview, Texas, facility. (As noted above, in-depth information on ETTL's Geotechnical Engineering Services is available elsewhere in this web site. Click the underline.)
(3) Engineering Assistance During the Construction Phase: ETTL's construction materials engineering (CME) group is available to inspect tower foundation excavations,
to monitor rebar and concrete placement, as well as to make, cure and compression test concrete sample cylinders (see the photo at right). (It also is equipped to carry out a full range of tests on materials, such as asphaltic concrete, used in access roads.) In addition, ETTL's CME group can be called upon for services leading to the formulation of construction materials for specific projects. (In-depth information on ETTL's Construction Materials Engineering Services is elsewhere in this web site. Click the underline.)
People to talk to at ETTL about tower projects include Steve Kennedy, Jack Whilden, Robert Duke and Mark Miller. They'll answer your questions about services and scheduling, or put you in touch with the right people, right away.
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