The following kinds of development are significant infrastructure projects—
(a)the construction of a dam or reservoir in Wales if the volume of water to be held back by the dam or stored in the reservoir is expected to exceed 10 million cubic metres;
(b)the alteration of a dam or reservoir in Wales if the additional volume of water to be held back by the dam or stored in the reservoir as a result of the alteration is expected to exceed 10 million cubic metres.
(1)Development relating to the transfer of water resources is a significant infrastructure project if—
(a)the development is carried out by one or more water undertakers,
(b)the development takes place in Wales,
(c)the volume of water to be transferred as a result of the development is expected to exceed 100 million cubic metres per year,
(d)the development enables the transfer of water resources—
(i)between river basins in Wales,
(ii)between water undertakers’ areas in Wales, or
(iii)between a river basin in Wales and a water undertaker’s area in Wales, and
(e)the development does not relate to the transfer of drinking water.
(2)In this section—
“river basin” (“basn afon”) means an area of land drained by a river and its tributaries;
“water undertaker” (“ymgymerwr dŵr”) means a company appointed as a water undertaker under section 6 of the Water Industry Act 1991 (c. 56) (appointment of relevant undertakers);
“water undertaker’s area” (“ardal ymgymerwr dŵr”) means the area for which a water undertaker is appointed under that Act.