Section 605.331  Retirement Unit Account 331 Transmission Mains and Distribution Mains

a)         Items

Air chamber

Bridge or culvert

Canal

Gate

Gate house

Gauge or recorder

Main, any two or more continuous standard lengths of pipe, including fittings

Manhole or vault

Main line meter

Meter house

Pressure regulator

Surge tank

Tunnel

Valve

b)         "Mains" shall include pipe, fittings, specials, joints, pavement cut and replaced, tunnelling, excavation and backfill, shoring and bracing and protection of openings (also includes permits, etc.)