Mackley completes improvements at Elmer Water Treatment Works

Mackley has successfully completed a major element of a programme of works which will help maintain and enhance water supply for more than 700,000 residents in Surrey, Kent and south London.

The programme of refurbishment works at Elmer Water Treatment Works is being carried out by Mackley under its framework partnership with SES Water.

At the heart of the project were major civils works to convert one of the existing redundant Enelco Filter Tanks into a new Sand Settlement Tank, a key element of the water treatment process.

In addition, a new reinforced concrete slab has been constructed spanning the remaining 2no. tanks which now houses a new Motor Control Centre (MCC) and provides additional storage space for other vital water treatment process chemicals and equipment.

Other works nearing completion include a new chemical delivery area, conversion of existing buildings into new gas storage and dosing plant, and refurbishment works to the existing lime plant, a vital part of the water softening process.

The civils works associated with the project were designed by the professional services company GHD and delivered by Mackley, with the help of specialist sub-contractors.

SES Water supplies around 160 million litres of clean water every day to more than 735,000 people and in excess of 282,000 homes and businesses across parts of Surrey, Kent and south London.

Its supply area covers 322 square miles extending from Morden and South Croydon in the north to Gatwick Airport in the south and from Cobham, Leatherhead and Dorking in the west to Edenbridge in the east.

SES Water maintains more than 2,000 miles of water mains and has eight treatment works, 23 pumping stations and 31 operational service reservoirs and water towers.

Elmer WTW is one of the largest of the company’s eight treatment works.

It serves an area of 193km2 and provides potable water to 65,000 properties and 150,000 people. Water abstracted from boreholes located on and around the site is softened and treated there, and the average water supply from Elmer WTW is 39 million litres per day.

18 May 2020

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