Calibre Estate - Bio-Retention Basin

Construction of a bio-retention basin, including excavation, HDPE lining and stormwater connection.

Bulk Earthworks/Excavation Anchor Trenches HDPE Geomembrane 1.5mm Smooth Slotted / Perforated HDPE Pipe (Various diameters)Subgrade Preparation

Clearing and grubbing of batter and trench line; excavation of the bio-retention basin; pond base preparation and removal of unsuitable materials; cut and backfill of the HDPE anchor trench; supply and installation of 1.5 mm HDPE membrane mechanically fixed to the sandstone wall; installation of pipework and pits; connection to the existing bio-retention basin; and supply and installation of bio-retention media to specification.

What was involved

Clearing & grubbing
Bio-retention basin excavation
Pond base preparation
HDPE anchor trench cut & backfill
1.5 mm HDPE membrane, mechanically fixed
Pipework & pits
Connection to existing basin
Bio-retention media supply & install

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