General construction services of aqueducts and other water supply conduits, except pipelines

**Includes:** - construction, repair, alteration and restoration services for: • aqueducts, water conduits and similar waterways designed to convey water for the purpose of water supply, except pipelines

**Excludes:** - construction services of waterworks for irrigation or flood control, cf. 54234 - construction services of long-distance pipelines, cf. 54241 - construction services of local water mains, cf. 54251