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Case Study:    
Lukely Brook Fish Pass, Weir and Trash Screen, Newport, Isle of Wight
Client:   Environment Agency (Solent & South Downs Office 01962 764 812)
Cost:   £134k
Duration:   8 weeks (March/April 2007)
Project overview
The works included the provision of sheet pile cofferdams to enable partial demolition of existing structures, excavation of the river bed and subsequent construction of new reinforced concrete structures (certain sections within confined space), including a new fish pass, weir, trash screen and penstocks. Works were carried out next to the listed St Cross Water Mill building (dating from circa 1800) and office buildings, therefore vibration was minimised to avoid any potential localised ground movement (and consequential structural damage to the existing structures), as well as minimising the impact of noise on the local wildlife and adjacent business premises. In-channel habitat was created upstream of the new structure to encourage Kingfishers to feed.
All plant and machinery was sourced from our extensive fleet which includes excavators (3-30t), tipper trucks (7.5-28t), dumpers, pumps, compressors and associated small tools, all based at our local commercial depots in Hale Common and at our Head Office on the Isle of Wight. All works were carried out by our full time local work force based on the Isle of Wight.
 
  • Excavation of the river bed to formation level of new reinforced concrete structure (carried out in conjunction with a watching brief by local archaeologist)
  • Reinforced concrete works undertaken within sheet piled cofferdam within ‘live’ riverbed
  • New reinforced concrete structure consisting of (L-R) fish/eel pass, weir and penstocks
  • Completed structure with trash screen, penstocks, fencing and handrails in place
  • Handrail and ‘bridge’ detail (above) and completed works (below)
  • Design of temporary works sheet piled cofferdam to enable works adjacent ‘live’ river
  • Completed Job
  • Completed Job
  • Completed Job
     

 

 
     
 

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