Improving water quality
As part of the Asset Management Programme (AMP6) Mackley undertook the construction of water treatment works at Tenterden. The project involved constructing a 4m deep 2.7m diameter pumping station including reinforced concrete cover slab, reinforced concrete hard-standing surround, valve slab and path way.
Other elements of the project included:
• 130m of rising main pipework including electro-fused, socket-spigot and bolted flanges.
• Construction of a R/C Motor Control Centre base, incorporating twelve 150mm ducts.
• Laying of over 600m of 150mm diameter ducting, including construction of four 1m³ draw-pits (three of plastic and one of brick).
• Construction of four 2.1m x 2.5m deep soakaways comprising of a 300mm deep base slab, then perforated manhole rings- with a biscuit and DI frame & cover.
• Coring through the existing 300mm thick R/C chambers which have been isolated, casting in pipework, and making water tight using a hydrotite seal, before making good. At the same time our team were controlling over-pumping via two 4” pumps at a rate of 45 litres per second.
• Raising of existing concrete tanks by drilling starter bars into the existing concrete walls, tying lacers, then erecting both square and radial shutters to raise and making water tight using a hydrotite seal.
• Modifications to the existing sludge handling areas including drainage, ducting, concrete plinths, Aco drainage and road-way.