# The Reservoirs Act 1975 (Capacity, Registration, Prescribed Forms, etc.) (England) Regulations 2013, Regulation 3: Calculation of capacity of a large raised reservoir

Extent: E+W

(1) An undertaker must calculate the capacity of a large raised reservoir by measuring the maximum volume of water in cubic metres capable of being stored in the reservoir—
(a) above the bed of the reservoir; and
(b) between the toe of the reservoir and its top water level.
(2) The calculation of the capacity of the reservoir must be completed by the earlier of—
(a) the date on which a final certificate is given for any purpose of the 1975 Act; and
(b) the date on which a certificate is given for the purposes of section 13(2) of the 1975 Act.
(3) Water not capable of flowing out of the reservoir over natural ground in the event of an uncontrolled release of water shall not be included in the calculation.
(4) In this regulation “bed of the reservoir” includes any silt or other material that is judged by the engineer giving a final certificate, or giving a certificate under section 13(2) of the 1975 Act, to be incapable of flowing out of the reservoir over natural ground in the event of an uncontrolled release of water from the reservoir.

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Source: https://www.legislation.gov.uk/uksi/2013/1677/regulation/3 (the official version)
Page: https://openlegislation.uk/reservoirs-act-1975-capacity-registration-prescribed-forms-etc-england-regulations-2013/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.