2006 Regional Flood Warning 
Phase V

Project undertaken on behalf of the Environment Agency – Thames Region in conjunction with Mowlem PLC and Halcrow Group Ltd which comprised the Supply, Construction, Installation and Commissioning of 23 River Level Monitoring Stations with Submersible Transmitters, 3 x Tipping Bucket Rain Gauge Stations

Level Monotoring Stations were located in the 3 operational areas as below:-

South East 6 locations SE21 to SE26

West Area 9 locations W18 to W26

West Area 3 locations RGW5 to RGW7

Pre-fabricated GRP Stilling Well sumps were utilised with 300mm Twinwall Risers to ground level with a pre-cast slab complete with Dipping Porthole and EA Benchmark.
Where GRP sumps were impractical or alternative means of mounting tubes were available galvanised tubes were utilised secured to the walls of the structures.

Rain Gauges were constructed to a standard drawing comprising an ELE

Tipping Bucket Rain Gauge and Stainless Steel Octapent Monthly Check Gauge

Environmental Agency Project with Halcyon Solutions

North East 8 locations NE22 to NE29

NE22 Town Bridge – River Chess, Chesham

Station located adjacent to Town Bridge to monitor part of the River Chess during high level events.The station was constructed at roadside with a black pigmented kiosk with the stilling well immediately underneath.