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Steel tanks were used instead of conventional concrete tanks. Although their design life of 25 years is shorter than concrete tanks (60 years), construction time was faster. [2] The works were constructed over the period April 2004 to September 2005. The completed plant was handed over to Thames Water in November 2005. The cost was £43 million ...
As of 2022, Thames Water extracts, treats and supplies 2.5 billion litres (550 million imperial gallons) of drinking water per day using 97 water treatment works, 308 clean water pumping stations and 31,100 km (19,300 mi) of managed water mains to 10.2 million customers (4 million properties) across London and the Thames Valley. [69]
This comprised detritus removal, a screen house, primary sedimentation tanks, a diffused air activated sludge plant and sludge digestion. The works were extended in 1967 to treat 1.14 million cubic metres per day of sewage, although they were capable of accepting a flow of 2.6 million cubic metres per day.
Water quality before and after storage in Queen Elizabeth II reservoir (as published in 1977) [needs update] Quarter Source Ammoniacal nitrogen mg/l Albumin nitrogen mg/l Nitrate mg/l Phosphate mg/l Turbidity units Agar colony count per ml E. coli number per 100 ml March to May River Thames before storage 0.25 0.23 4.7 1.8 18 5387 5298
Additional storage capacity is expected to be needed by 2043 to cater to projected population growth in the Thames Basin. [7] [8] In early 2025, Thames Water opened discussions with potential contractors about delivery of the reservoir, which would cost up to £2.2bn to build and would then supply water to 15m people across southeast England.
The peak energy consumption of the plant is 17.6 MW in worst-case conditions, and the average power consumption was estimated at 14 MW, which results in an energy usage of 2.27 kWh per cubic metre of water produced. [12] In 2022, Thames Water revised the usable output of the plant down to 100 megalitres per day, because of "unrealistic ...
In its first year of operation it treated an average of 60,020,000 gallons of sewage per day. [12] From 1935 the treatment facilities at Mogden comprised storm water tanks, primary sedimentation, sewage aeration, final separation and sludge digestion. The plant was designed to treat three million cubic metres per day of sewage. [13]
Water is abstracted from the River Thames downstream of Penton Hook Weir at up to 200,000,000 imp gal (910,000,000 L; 240,000,000 US gal) [8] and flows via the 1.26 km Laleham Aqueduct to a pumping station (51°24'56.0"N 0°28'36.9"W) at the western embankment of the reservoir. The pumping station lifts water into the reservoir.