Trenchless technologies for replacing water and sewer pipes — lining, pipe bursting and others — have become well established. For prospective users, a key question is which trenchless technology is the most cost-effective for a given application. The National Association of Sewer Service Companies (NASSCO), with the Trenchless Technology Center at Louisiana Tech University, has stepped in with the Trenchless Assessment Guide for Rehabilitation software (TAG-R). The software provides guidance in the decision-making process. By entering specific variables related to a particular trenchless project, users can generate a list of alternative technologies best suited to the task. While far more
