Drainage Diversions, Utility Disconnections & Diversions

Flood & Civil can assist with the diversion or disconnection of drainage and utilities, as required to clear the site for proposed development.

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Our experts consult with the water authorities and utility providers to obtain the relevant costs and identify optimal diversion routes. Where a public sewer is to be diverted we can assist with the formal process (usually a S185 agreement) through which the diversion is agreed with the water authority. We can also assist with sewer build-over agreements.

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We are experienced in designing diversions from large (>1m diameter) public sewers, sometimes referred to as 'trunk' or 'strategic' sewers, all the way down so small private drainage diversions (often only a 100mm or 150mm drainage pipe).

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To design a drainage diversion we will need some survey information. This usually includes a topographical survey of the land the sewer passes through, including ground levels, a CCTV camera survey of the sewer itself and a manhole survey to establish the construction, condition and invert levels of the drains flowing in and out of each manhole. We can produce a survey specification and approach suitably qualified surveyors on your behalf, to help you obtain the information we need to design your drainage diversion.

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