How Do Utility Extension Rules Work in a Texas ETJ?

I read the utility extension agreement the way I read an annexation agreement — as the document that controls the project's infrastructure economics. Key provisions: the scope of the extension (which mains, what sizes, what appurtenances), design standards and the approving engineer, construction inspection and acceptance testing requirements, the dedication process transferring ownership to the system owner, capacity reservation terms with quantities and expiration, fee and cost responsibility including oversizing, and reimbursement mechanisms for future connections. Anything vague in the agreement becomes a dispute during construction; I push for specificity before the owner signs, particularly on who pays for rock excavation, dewatering, or other subsurface surprises along the extension route.

The civil design follows the system owner's design manual to the letter — this is infrastructure they will own and maintain for decades, and their reviewers check accordingly. I model water distribution for the project's peak demands plus fire flow, and sewer collection for peak wet-weather flows, in both the initial and ultimate buildout conditions. Easements get dedicated at the widths the owner requires, with access for maintenance equipment, not just the pipe. Lift stations, where gravity service is not feasible, are designed to the owner's standards for equipment, controls, backup power, and access — a lift station the owner will not accept is a stranded asset. The extension plans go through the owner's engineer review in parallel with the site's building permit track.

An ETJ utility extension succeeds when these items are locked down early. The extension is often the project's longest lead item, so it starts first. • System owner identified (city utility, MUD, or supply corporation) with capacity confirmed in writing • Extension agreement negotiated with clear terms on scope, cost, oversizing, and reimbursement • Full extension cost — design, construction, easements, fees, upgrades — in the project budget • Extension designed to the owner's manual for initial and ultimate buildout conditions • Dedication, testing, and acceptance criteria understood before construction begins