Photo and article is summarised from Waste and Water Treatment Online.
The 1910 reservoir (120Ml capacity) had a high level crack appearing along the perimeter walls soon after construction. This reduced the capacity of the reservoir. Furthermore deterioration or the nature of a shallow barrel vaulted roof reduced the load bearing of the roof structure. There were also problems with remaining capacity because of the part height internal division wall when cleaning, so STW decided to build 2 new reservoirs. The first one has 2No. 43.5Ml compartments and the second one built on the demolished reservoir site has a single cell of 50Ml capacity. Total 137Ml.
Some interesting Construction points:
Bridges were built over existing pipework (1 inlet and 3 outlet mains) to protect them from construction plant damage.
To reduce moving excavated material off site a novel temporary storage solution was employed using plastic membranes on a sloping site. This allowed excavated material to be stacked for later reuse in landscaping.
Roof columns, beams and planks cast off site in factory conditions at Worksop.
The second reservoir employed a precast twinwall that was later filled with concrete.
Pipework 1200mm diameter with butterfly valves for flow control. Flowmeters - Ultrasonic.
Constructed by Laing O’Rourke and NMCNomenca, designed by Atkins
The 1910 reservoir (120Ml capacity) had a high level crack appearing along the perimeter walls soon after construction. This reduced the capacity of the reservoir. Furthermore deterioration or the nature of a shallow barrel vaulted roof reduced the load bearing of the roof structure. There were also problems with remaining capacity because of the part height internal division wall when cleaning, so STW decided to build 2 new reservoirs. The first one has 2No. 43.5Ml compartments and the second one built on the demolished reservoir site has a single cell of 50Ml capacity. Total 137Ml.
Some interesting Construction points:
Bridges were built over existing pipework (1 inlet and 3 outlet mains) to protect them from construction plant damage.
To reduce moving excavated material off site a novel temporary storage solution was employed using plastic membranes on a sloping site. This allowed excavated material to be stacked for later reuse in landscaping.
Roof columns, beams and planks cast off site in factory conditions at Worksop.
The second reservoir employed a precast twinwall that was later filled with concrete.
Pipework 1200mm diameter with butterfly valves for flow control.
Flowmeters - Ultrasonic.
Constructed by Laing O’Rourke and NMCNomenca, designed by Atkins
This synopsis is based an article originally appeared in the December 2018 issue of WET News
https://wwtonline.co.uk/features/reservoir-renewal-severn-trents-ambergate-project