Stourport S278 Infrastructure

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Client: Bowmer & Kirkland

Value: £3,300,000

Programme: 39 weeks

Completion Date: April 2012

This scheme was for the construction of over 1000m of highway infrastructure, new bridge and causeway on the River Stour floodplain for a new retail development in the centre of Stourport undertaken over 39 weeks under the supervision of Worcestershire County Council. 

Site clearance involved demolition and recycling of an existing concrete bridge and the bases of former factories on the brown field site. 2000m of foul and storm water drainage up to 300mm dia and 2.5m depth was constructed  with two hydrobrakes and five in-situ concrete outfall headwalls, a reed bed attenuation pool was created and river protection work involved  30m of sheet piling, 2000m2 of pre-seeded coir matting and stone pitching to the new bridge abutments and 100m of existing river bank. 
 
Protection was provided to an existing below-ground attenuation tank through construction of a 300m2 in-situ reinforced concrete slab supported on 190 CFA piles to 8m depth. A previous unidentified 2.5m dia brick lined well with a borehole at the bottom up to 30m depth was discovered and required treatment. This was pumped out and stone grouted then capped with an in-situ reinforced concrete cap.
 
A new 50m long and 1.5m high cast in-situ retaining wall structure was required to support the existing highway at the site boundary.
 
New highway construction consisted of over 1000m of 6.5m wide carriageway with a new 20m diameter 3 leg roundabout with street lighting, signage, fencing and kerb drainage. On the bridge approaches the carriageway was raised through construction of new 5m high embankments which also included 406 VCC piles at 5m depth for stabilisation of the earthworks and 1000m2 of geotextile to further stabilise the embankments.
 
The new bridge and causeway required 340 continuous flight auger local transfer piles at 8m depth and plugged 2m in to the rockhead for foundations to the abutments and parapet walls.  
 
Following this the new 33m span bridge and 35m causeway over the River Stour was constructed with stone pitched in-situ concrete abutments and parapet walls and pre-cast bridge beams. 
 
Further highway works included junction improvements to the four way junction of Lion Hill, Vale Road and Mitton Road. This involved night time working to reconfigure the junction and introduce traffic signals and three pedestrian crossings. An existing three way junction was signalised on Mitton Street and Severn Road with the introduction of a further two pedestrian crossings.
 
Improvements and resurfacing was undertaken to 1200m2 of existing carriageway in Severn Road and Mitton Street using night time working.
 
The works completed on-time and within budget to the satisfaction of the client and the project was awarded the Chartered Institution of Highways and Transportation’s Best Small Highway and Transportation Project in 2013.