§ Mr. McCusker
To ask the Secretary of State for Northern Ireland what requirement he has to determine the mean, low water and maximum flow of a river at the sites of water mills, and the capacity of any water turbine, pelton wheel, or waterwheel being installed.
§ Mr. Viggers
There is no statutory requirement to determine the mean, low water and maximum flow of any watercourse.
It may be necessary when consenting to a new installation to establish the capacity of any water turbine, pelton wheel or waterwheel being installed to ensure that it does not adversely affect the flow of water in a watercourse. It is usually the case that an existing weir or dam is used as a source of power, leaving the regime of the watercourse unchanged.