# The Agriculture (Calculation of Value for Compensation) Regulations 1978, Chapter 1: Mole drainage and works carried out to secure the efficient functioning thereof


(1) (a) Where the moles discharge into a piped main drain, the value shall (subject to sub-paragraph (2) below) be the reasonable cost of the work less one-sixth for each year since the work was completed;
(b) Where the moles discharge direct into an open ditch (whether the outfalls are piped or not), the value shall (subject to sub-paragraph (2) below) be the reasonable cost of the work less one-third for each year since the work was completed.
(2) If the value of any work, calculated in accordance with sub-paragraph (1) above, exceeds the actual value to an incoming tenant, in any case where—
(a) plans on a suitable scale, made at the time when the work was done, and showing the position of all moles, mains and outfalls, are not made available to the landlord; or
(b) moles were not drawn at a proper depth, having regard to the nature of the soil and subsoil; or
(c) any ditches into which the outfalls discharge have not been maintained clean, free from obstruction and at a proper depth since the work was done; or
(d) deep cultivation or other work interfering with the efficient functioning of the drains has been done on the land since the drainage work was completed; or
(e) the land is not of consistently suitable slope or soil texture for mole drainage to be effective; or
(f) the drainage scheme was not a proper one, having regard to all the conditions, or was not efficiently carried out; or
(g) for any other reason, the drainage system does not function efficiently,
the value so calculated shall be reduced so as not to exceed such actual value.

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Source: https://www.legislation.gov.uk/uksi/1978/809/schedule/1/part/I/chapter/1 (the official version)
Page: https://openlegislation.uk/agriculture-calculation-of-value-for-compensation-regulations-1978/schedule-1/part-I/chapter-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.