DMRB: Sustainability and Environment LA 113 Version 1.1.0 Road drainage and the water environment. Version 1.1.0
Publication Year
2026
Document Status
Current
Abstract
Gives guidance for assessing and managing the impacts of road projects on the water environment. Covers design and mitigation, reporting, and monitoring.
Document History
Sustainability and Environment. Appraisal. Supersedes LA 113 Road drainage and the water environment (formerly HD 45/09). Revision 1 (HE, 2020). Design manual for roads and bridges, DMRB. Version 0 dated Aug 2019 - replaces HD 45/09. Version 1 dated Mar 2020 - updates references. Version 1.1.0 dated September 2026 - changes made to core document, England NAA and Scotland NAA.
Publisher Information
National Highways
National Highways is an executive non-departmental public body, sponsored by the Department for Transport. It has responsibility for operating, maintaining and improving motorways and major A roads in England. Formerly known as Highways England, between 2015-2021 and Highways Agency, between 1994-2015.
