# The Hornsea Four Offshore Wind Farm Order 2023, Paragraph 17: Pre-construction monitoring and surveys

Extent: E+W+S

(1) The undertaker must in discharging condition 13(1)(f) for each stage of construction submit a monitoring plan or plans for that stage in accordance with an outline marine monitoring plan for written approval by the MMO in consultation with the relevant statutory bodies, which must contain details of proposed surveys, including methodologies and timings, and a proposed format and content for a pre-construction baseline report and—
(a) the survey proposals must be in accordance with the principles set out in the outline marine monitoring plan and must specify each survey’s objectives and explain how it will assist in either informing a useful and valid comparison with the post-construction position or will enable the validation or otherwise of key predictions in the environmental statement; and
(b) the baseline report proposals must ensure that the outcome of the agreed surveys together with existing data and reports are drawn together to present a valid statement of the preconstruction position, with any limitations, and must make clear what post-construction comparison is intended and the justification for this being required.
(2) Subject to receipt from the undertaker of specific proposals pursuant to this condition, the pre-construction survey proposals must comprise, in outline—
(a) a full sea floor coverage swath–bathymetry survey that meets the requirements of IHO S44ed5 Order 1a, of the Order limits and a buffer outside to—
(i) determine the location, extent and composition of any biogenic or geogenic reef features, as set out within the outline marine monitoring plan;
(ii) inform future navigation risk assessments as part of the cable specification and installation plan; and
(iii) inform the identification of any archaeological exclusion zone and post consent monitoring of any such archaeological exclusion zone;
(b) any ornithological monitoring required by the ornithological monitoring plans submitted in accordance with condition 13(1)(j).
(c) a bathymetric survey that meets the requirements of IHO S44ed5 Order 1a of the area within the following coordinates—
Development area node point
WGS84 UTM Zone 31N (metres)
WGS84 (DMS)
WGS84 (decimal degrees)
Easting
Northing
Latitude
Longitude
Latitude
Longitude
1
401818
5992480
54° 4′ 16.157″ N
1° 29′ 58.386″ E
54.07115
1.49955
2
411109
5984944
54° 0′ 18.479″ N
1° 38′ 37.320″ E
54.00513
1.64370
3
397695
5985627
54° 0′ 31.626″ N
1° 26′ 19.993″ E
54.00878
1.43889
4
397800
5978992
53° 56′ 57.085″ N
1° 26′ 33.766″ E
53.94919
1.44271
5
387657
5983579
53° 59′ 17.868″ N
1° 17′ 11.556″ E
53.98830
1.28654
6
401818
5992480
54° 4′ 16.157″ N
1° 29′ 58.386″ E
54.07115
1.49955
(3) The pre-construction survey(s) carried out pursuant to condition 17(2)(a)(ii) and 17(2)(c) must fulfil the requirements of MGN654 and its supporting ‘Hydrographic Guidelines for Offshore Renewable Energy Developer’ (as relevant).
(4) The undertaker must carry out the surveys specified within the monitoring plan or plans in accordance with that plan or plans, unless otherwise agreed in writing by the MMO in consultation with the relevant statutory nature conservation body.
(5) Following completion of a survey carried out pursuant to this condition and prior to construction of the relevant stage, the undertaker must provide a report and full density data of the survey outcomes to the MMO, the relevant statutory nature conservation body, the MCA and UK Hydrographic Office as relevant.

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Source: https://www.legislation.gov.uk/uksi/2023/800/schedule/11/paragraph/17 (the official version)
Page: https://openlegislation.uk/hornsea-four-offshore-wind-farm-order-2023/schedule-11/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.