2006 Regional Flood Warning 
Phase V West Area

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

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.

Similarly Gaugeboards were either of the driven T Iron types or wall mounting.

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


W18 Wendlebury Brook, Wendlebury

Kiosk located at roadside alongside fence. The Brook is to the right of the fence with lots of laurel bushes



Standard Stilling Well with Dipping Porthole

River Chess, Chesham



W19 Rushey Platt – River Ray ( Swindon )


Inlet tube to Sump with Rodent Barrier


W20 River Churn – South Cerney

Kiosk constructed with blockwork and clad in oak boards which are to be allowed to “silver” naturally part of planning consent


Gaugeboard positioned to avoid debris


W21 Lower Stratton – River Cole, Swindon

fairly good day when we started


Gaugeboard Installed

Arnos Park


Then it rained ! The need for the station then becomes obvious

Pymmes Brook


W22 Winterbourne Monkton – River Kennet

Avebury just down the road


Kiosk mounted on an elevated 500mm plinth


Stilling Well slab with EA Benchmark

Rosendale Way


No problem with BT connection


83 Metres AOD, Catchment 01, Gaugeboard No 003



 W24 Stock Lane – Ginge Brook, Steventon 

Steventon is halfway between Paddington and Bristol, this is where Isambard Kingdom Brunel’s offices were located. The level crossing about 100 metres away was almost always closed with Intercity 125 trains at full speed

Small RiverLee in Cheshunt


Short Stilling tube mounted on bridge with immersible junction box
complete with terminals and breather


W25 Station Road – River Cherwell, Woodford Halse

It was very wet and muddy during installation

Simple stile to get over the fence

Trinity Lane, Theobalds Brook, Waltham Cross


About 4 weeks later stinging nettles galore !


W26 Brookside –Wendover Brook, Weston Turville


Chesham Close, River Rom, Romford


110mm Inlet pipe with Rodent Barrier


Very tranquil scene with 100mm of water

Halcyon Solutions, Lawday Link, Upper Hale, Farnham, Surrey. GU9 0BS

Tel/Fax: 01252 715765 contact us Email: Halcyon-Solutions

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