Kirkby-in-Ashfield STW 
Scheme details 
Client 
Draper Civil Engineering Ltd (for Galiford Try & Severn Trent Water) 
 
JOS Value 
£400k  
 
Time 
2023 - 16 weeks  
 
Sectors 
Water - Envirnonment 
 
Purpose 
To build an activated sludge process (ASP) for severn trent water, which is a compact solution to treat domestic wastewater. This required steel shuttering 6m high to give the highest quality finish and prevent any build up of bacteria once the tank is in use.  
Key Data 
4 chamber ASP tank (39m x x12m x 6.5m high) on Severn Trent treatment works 
Additional bases and chambers for peripheral equipment 
6m high steel formwork to provide the highest quality finish 
161t reinforcement fixed  
935m3 Concrete poured 
JOS Supply 
Labour 
Temporary materials 
Small plant  
 
 
 
 
Following a number of successful schemes with Draper Civil Engineering, JOS delivered the reinforced concrete works in partnership at Kirkby Sewage Treatment Works (STW). Draper provided the groundworks, crainage and materials for JOS to execute the reinforced concrete works. JOS assisted in the success of the scheme by carrying out additional works alongside the contracted work package. 
 
The development of a steel shuttering system in a pre-determined sequence designed in collaboration with Efco helped to achieve the high quality finish and maximise re-use of the system whilst bettering the programme. 
 
The construction was carried out in an operational STW, working with the hazards of dirty water and the ongoing operational requirements of Severn Trent which were not impacted. 
 
The Kirkby STW scheme has been setting the standards for H&S, Quality and Programme, and this is all down to your hard work and attention to detail. Each and every visit from a Senior Leadership Person always results in praise for the quality of the site. 
 
Luke Vardy - Project Manager - Galliford Try 
 
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