This metro runs on districts — hundreds of MUDs alongside the cities — and district infrastructure means constant crossings: force mains to regional plants, water transmission under arterials, reclaimed lines through built-out sections. We pull fused HDPE and fusible PVC on profile, fusion by qualified operators, testing to the district engineer's standard.
Force mains in flat, wet country are a profile discipline: with almost no natural grade to work with, a vertically sloppy bore creates air pockets the district fights forever. Grade-critical shots here get rod-by-rod verification against the design profile, and we say no to alignments where HDD can't honestly hold what the profile needs.
District work also means engineer-of-record submittals — bore plan, mud plan, fusion certs — packaged before mobilization, inspection coordinated, as-builts delivered in the format the district actually files.