This category has been established to organize web sites with information pertaining to trenchless technology so that directory users will have easy access to such information. Trenchless technology is a diversified industry primarily within the construction and engineering industries, but with considerable ties to academic institutions (including multiple academic centers dedicated to trenchless technology), and with its own professional societies, trade magazines, website portals, etc. The trenchless technology industry uses various technologies to limit the disturbance of surface structures during the new installation or the repair of existing underground structures. In addition to being less disruptive, trenchless technologies are often faster and more cost-effective than the traditional direct burial construction techniques. Trenchless technologies such as horizontal directional drilling (hdd), microtunneling, pipe jacking, etc. are routinely used for the new installation of utility piping for the sewer, water, gas, power, cable, and telecommunications industries. Trenchless technologies such as grouting, coating, pipelining, pipe bursting, etc. are routinely used for the repair or replacement of such existing underground utilities, often as part of a regular operations and maintenance program.