AI for underground utility contractors, tested on lines an owner has already accepted.

The trade has a legal outline, and it mixes wet and dry. Florida's contracting statute, section 489.105, describes an underground utility and excavation contractor by the main water, sanitary sewer and storm systems it builds and the continuation of those lines to a point of termination, up to and including the meter. The same definition lets that contractor lay empty underground conduit in rights-of-way and easements, so long as a licensed engineer or an authorized employee of a municipality, county or public utility designed the system and no conductor or energized connection is part of the work. Each of those kinds of line closes out on different paper.

A test counts once someone can find it on the drawing. The Florida Department of Health office in Hillsborough County clears new water lines on DEP Form 62-555.900(9). It wants the pressure test report to give a location traceable to the record drawing, wants that drawing to show the chlorine injection points, the bacteriological sample locations and every deviation from the permit, and warns that going into service before clearance can bring a civil penalty. Columbus, Ohio prints the same idea on its water main test form: the stationing shown has to be as-built stationing. The two jobs on this page lean on each other, and a station typed wrong in one shows up as a gap in the other.

Paper decides when a line can move. Berkeley County Water and Sanitation, in South Carolina, schedules a new main for flushing only after walkthrough items are corrected and all closeout documentation is in. A line that passed but goes a year without a state permit to operate is tested, disinfected, flushed and sampled again before final acceptance. Miami-Dade's water and sewer department allows ten county calendar days after a successful test to show interconnections, abandonments and cut and plugs on the final as-built and resubmit it, and on lines built for donation to the county the bill of materials has to match installed and as-built quantities.

Developer work adds a transfer. Palm Beach County's water utility takes on a developer's new facilities through a Bill of Sale, with an attachment signed by the developer and by the underground contractor or general contractor, listing the cost of only the assets being turned over.

Duct banks and storm lines prove out their own way. Galveston's section on underground duct banks asks for 24 hours' notice of a cover-up inspection before concrete goes in, red dye in the envelope so a later excavator can spot it, and, once the bank is complete, a mandrel pulled through each duct and a swab repeated until it comes out clean. On storm work, ASTM F3080 describes measuring pipe shape by laser and camera on storm sewers, drains and other gravity lines from 6 to 72 inches, and says those measurements can verify an installation for acceptance.

One limit covers both jobs. The proof of concept never touches your job cost, estimating or GIS system or a live submittal, and it never decides that a line passed a test or that a record is accurate. Your project manager checks every package, and the surveyor or engineer of record decides what the as-built shows. Certified payroll stays out. The owners and rules named here change by job and jurisdiction, and nothing on this page is legal or engineering advice.