County / national tender

Piped storm water drainage — 500 m

Urban storm drain under a carriageway or footway: trench, 600mm pipeline, concrete surround, manholes and road gullies, discharging to a protected outfall.

What the bill measures

Item	Qty	Unit
22.01(a)(i) Excavation for culverts: soft material, 0.5 m up to 1.5 m deep 500m x 1.2m x 1.5m average depth; split by depth band against the long section before issue	900	m3
22.02(b) Backfilling using imported selected material selected backfill over pipe	700	m3
22.03(a) Concrete pipe culverts on Class A bedding, 600 mm dia, trunk line	500	m
22.03(b) Concrete pipe culverts on Class B bedding, 300 mm dia, gully connections 34 No. x 5m yours to price	170	m
22.07(a) Cast in situ concrete in Class A bedding, screeds and encasing for pipes, including formwork, class 15/20 blinding 50 mm to trench bed 600 m2	30	m3
22.07(a) Cast in situ concrete in Class A bedding, screeds and encasing for pipes, including formwork, class 20/20 haunching and surround under carriageway	125	m3
22.17(a) Manholes complete, 1050 mm dia, standard depth 1.5 m at 45m centres and at each junction yours to price	17	No.
22.17(b) Catchpits complete, road gullies with grating both kerb lines at 30m centres yours to price	34	No.
22.17(d) Extra over 22.17(a) for manholes deeper than the standard depth, 1050 mm dia 6 No. in the lower reach averaging 2.0m deep yours to price	3	m
22.S1 Special item: trench support and dewatering to pipe trenches, provisional measure against the trial pits yours to price	500	m
23.01(a) Concrete kerbing, precast, laid and bedded channel to the gullies, both sides	1,000	m
23.05(a) Inlet, outlet, transition and similar structures (typical designs), masonry outfall headwalls	2	No.
25.01(c) Wired and grouted stone pitching, 150 mm, outfall apron	40	m2
26.04(a) Galvanised gabion boxes, 2 x 1 x 1 m boxes, filled and laced 12 boxes, scour protection to the receiving channel; m2 of exposed face, 2 m2 per box; confirm the basis	24	m2
31.01(b) Removal of topsoil 1.2m trench width x 500m x 150mm	90	m3

Preliminaries and the contractor's own obligations (Bills 1 and 9) are added to the project too, unpriced. Items the library has no rate for — manholes, catchpits, small-bore pipes, trench support, and the contractor's own obligations in Bills 1 and 9 — are measured in full and left at nil for you to price. On a tender you are issuing that is the correct form: the rate column is the question. On one you are pricing, those are the lines to put your own build-up against first.

Other civil works

Murram access road — 1 km

Culvert crossing — 900mm pipes

Plot drainage & erosion control

Roadside drainage, both sides — 1 km

Footway & kerbing, both sides — 1 km