4f4c4942-4343-5764-6473-313139313631 eng dataset Natural Resources Wales (NRW) 0300 065 3000 Maes-y-Ffynnon LL57 2DW enquiries@naturalresourceswales.gov.uk pointOfContact 2023-02-06 Gemini 2.2 urn:ogc:def:crs:EPSG::BNG OGP Main Rivers Prif Afonydd Statutory Main River Map 2022-01-31 publication 119161 https://naturalresources.wales The statutory main river map is a 1:10,000 scale spatial (polyline) dataset that defines statutory watercourses designated by Natural Resources Wales as main rivers. The data is for Wales only. 'Main rivers' are usually larger streams and rivers, but some of them are small watercourses of significance. They include certain structures that control or regulate the flow of water in, into or out of the channel. Natural Resources Wales (NRW) 0300 065 3000 Maes-y-Ffynnon LL57 2DW enquiries@naturalresourceswales.gov.uk owner Natural Resources Wales (NRW) 0300 065 3000 Maes-y-Ffynnon LL57 2DW enquiries@naturalresourceswales.gov.uk custodian Geographic Information System Hydrography GEMET - INSPIRE themes, version 1.0 2023-02-07 publication © CNC/NRW All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Rights. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. otherRestrictions There are no access restrictions on this data. NRW may release, publish or disseminate it freely. eng inlandWaters ISO3166 Countries 2023-02-07 publication Wales (WLS) -5.77774100 -2.60886500 51.24082900 53.51206700 2005-01-01 2022-01-31 Natural Resources Wales (NRW) 0300 065 3000 Maes-y-Ffynnon LL57 2DW enquiries@naturalresourceswales.gov.uk distributor https://datamap.gov.wales/layers/inspire-nrw:NRW_MAIN_RIVERS Download data and Web Services https://datamap.gov.wales/capabilities/layer/414/?access_token=67k4GhAr91AqiAXnyngsm3l40RrZII&ows_service=wms Web Mapping Service dataset Natural Resources Wales has permissive powers, but not a duty, to carry out maintenance, improvement or construction work on designated main rivers. Natural Resources Wales has powers to regulate the activities of others affecting rivers and their flood plains under the Environmental Permitting Regulations, the Water Resources Act 1991 and our land drainage byelaws. All other watercourses are 'ordinary watercourses'. On these watercourses the Lead Local flood Authority or, if within an Internal Drainage District, the Internal Drainage Board have similar permissive powers to maintain and improve. They also have powers to regulate works under the provisions of the Land Drainage Act 1991 and local byelaws. Natural Resources Wales undertakes the role of t he Internal Drainage Board in Wales for all Internal Drainage Districts.