Document Status
Current
Supplement
Civil & Structural Supplement
Series
DMRB: Drainage
Abstract
Provides requirements for highway drainage surveys, covering validation, priority asset survey, filter drain condition survey by GPR, condition and connectivity survey, pipework and chambers defect survey by CCTV, pipework geometric survey by laser profile, pipework inclination survey, chamber defect and geometric survey by laser scanner, ditch profile survey, soil characterisation sampling and testing and all assets defect survey.
History
Drainage. Inspection and assessment. Supersedes CS 551 Drainage. Inspection and assessment. Drainage surveys (formerly SD 15/03). Version 1.0.0 (NHW, 2021). Version 0 dated June 2019. Version 1.0.0 dated October 2021 - changes made to core document England NAA. Version 1.1.0 dated September 2025 - incremental change to requirements.
Subjects
- Roads
- Contract documents for highway works
- Contracts
- Civil engineering, infrastructure and public utilities
- Transport facilities
- Road surface water drainage
- Legal issues and management
Publisher History
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.