* The majority of those who operate and plan the construction of sanitary sewer systems are not aware that HDD is suitable for many of their projects; and
* Many sewer system professionals who are aware of directional drilling do not believe HDD machines are capable of installing pipe at the critical grades essential for gravity-flow sewer systems; therefore they do not consider HDD a viable option.
Both viewpoints are based on either a lack of understanding or outdated information, as the technology to make on-grade bores is available now.
Directional drilling equipment today is capable of handling pipe in sizes that make up much of our sanitary sewer infrastructure. Similarly, guidance electronics designed to facilitate grade control – when properly used – help drillers achieve consistent results that make HDD on-grade installations cost effective for project owners and profitable for contractors.
These facts remain unknown to public works professionals largely because the HDD industry has not promoted the proven technology directional drilling offers the civil engineers, public works engineers and managers who plan sanitary sewer projects.