(2) In this Part of this Schedule—
“BW” means the British Waterways Board;
“BW’s network” means BW’s network of waterways;
“construction”, in relation to any specified work or protective work, includes—
the execution and placing of that work; and
any such replacing, relaying, removal, alteration, maintenance, repair or reconstruction of that work as may be carried out during the period of 12 months from the completion of that work,
and “construct” and “constructed” have corresponding meanings;
“detriment” means any permanent damage to a waterway or any other property of BW and, without prejudice to the generality of that meaning, includes—
the erosion of the bed or banks of a waterway or the impairment of the stability of any works, lands or premises forming part of a waterway;
the siltation of a waterway or the deposit of materials in it so as to permanently damage the waterway;
the pollution of a waterway;
any permanent alteration in the water level of a waterway, or permanent interference with the supply of water thereto, or drainage of water therefrom; and
any permanent harm to the ecology of a waterway (including any permanent adverse impact on any site of special scientific interest comprised in BW’s network);
“the engineer” means an engineer appointed by BW for the purpose in question;
“plans” includes sections, designs, drawings, specifications, soil reports, calculations, descriptions (including descriptions of methods of construction) and programmes;
“protective work” means a work constructed under paragraph 46(3);
“specified work” means so much of any of the authorised works as is situated upon, across, under, over or within 15 metres of, or may directly and physically affect, the waterway;
“towing path” means the towing path forming part of the waterway; and
“waterway” means any canal, or inland navigation belonging to or under the management or control of BW, and includes any works, land or premises belonging to BW, or under its management or control, and held or used by BW in connection with any such canal or inland navigation.
(3) Network Rail shall not under the powers conferred by this Order acquire compulsorily any land of BW, or any easement or other right over such land other than such land, or easements or other rights over such land, as is reasonably necessary for, or in connection with, the construction, maintenance or operation of works authorised by this Order.