52 (y) of whatever nature, as may be necessary or expedient for the purposes of, or for purposes  associated with or ancillary to, the construction, operation or maintenance of the  authorised development.  (p) embankments, viaducts, bridges, aprons, abutments, shafts, foundations, retaining walls,  drainage works, outfalls, pollution control devices, pumping stations, culverts, wing  walls, fire suppression system water tanks and associated plant and equipment, highway  lighting and fencing;  (q) settlement mitigation measures for the benefit or protection of, or in relation to, any land,  building or structure, including monitoring and safeguarding of existing infrastructure,  utilities and services affected by the authorised development;  (r) to alter the course of, or otherwise interfere with, navigable or non-navigable  watercourses;  (s) landscaping, noise barriers, works associated with the provision of ecological mitigation,  and other works to mitigate any adverse effects of the construction, operation or  maintenance of the authorised development;  (t) areas of hard or soft landscaping works, or public realm, at various locations adjacent to  the proposed highway and associated works;  (u) site preparation works, site clearance (including fencing and other boundary treatments,  vegetation removal, works of demolition, including demolition of existing structures, and  the creation of alternative highways or footpaths) and earthworks (including soil stripping  and storage and site levelling);  (v) construction compounds and working sites, temporary structures, storage areas (including  storage of spoil and other materials), temporary vehicle parking, construction fencing,  perimeter enclosure, security fencing, construction-related buildings, welfare facilities,  office facilities, other ancillary accommodation, construction lighting, haulage roads and  other buildings, machinery, apparatus, works and conveniences;  (w) service compounds, plant and equipment rooms, offices, staff mess rooms, welfare  facilities, and other ancillary and administrative accommodation;  (x) for the benefit or protection of the authorised development; and 