Project undertaken on behalf of the Environment Agency – Thames Region which comprised the Supply, Construction, Installation and Commissioning of 9 River Level Monitoring Stations, 4 x DL7151 with Submersible Transmitters 3 x DL4151 with Submersible Transmitters and 1 DL7141 with Shaft Encoder.
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.


Rodent Traps for inlet tubes


Pre-made Stilling Well Slab


Dipping Plate
Top of Stilling Tube with
Removable Bung fitted


Each station was provided with a local earth pit to which both Telephone Line and
Sensor Lightning Prtotectors are connected. In all but one site the Earth Pit was
located in the kiosk apron. One site needed two pits to achieve the Agency’s required
10 ohms Resistance.


NE20 Navestock


NE21 Furneaux Pelham
Here we found some recruits


SE18 Ifield


SE19 Crookham Village


SE20 Passfield


W15 Bicester


W16 Swindon


W17 Clanfield

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