Building Construction Handbook, Eighth Edition

Services which may be encountered on construction sites and the

authority responsible are:-

Water † Local Water Company

Electricity † transmission ~ RWE npower, BNFL and E-on.

distribution ~ Area Electricity Companies in England

and Wales. Scottish Power and Scottish

Hydro-Electric, EDF Energy.

Gas † Local gas or energy service providers, e.g. British Gas.

Telephones † National Telecommunications Companys, e.g. BT,

C&W, etc.

Drainage † Local Authority unless a private drain or sewer when

owner(s) is responsible.

All the above authorities must be notified of any proposed new

services and alterations or terminations to existing services before

any work is carried out.

Locating Existing Services on Site ~

Method 1 † By reference to maps and plans prepared and issued by

the respective responsible authority.

Method 2 † Using visual indicators ~

Method 3 † Detection specialist contractor employed to trace all

forms of underground services using electronic

subsurface survey equipment.

Once located, position and type of service can be plotted on

a map or plan, marked with special paint on hard surfaces

and marked with wood pegs with indentification data on earth

surfaces.

Locating Public Utility Services