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Drainage surveys (formerly SD 15/03). Version 1.0.0

DMRB Volume 4 Section 2 CS 551 Version 1.0.0

Drainage surveys (formerly SD 15/03). Version 1.0.0

Document Status



Civil & Structural Supplement


DMRB Volume 4 Section 2


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.


Drainage. Inspection and assessment. Supersedes CS 551 Drainage. Inspection and assessment. Drainage surveys (formerly SD 15/03) (HE, 2019). Design Manual for Roads and Bridges. DMRB. Version 0 dated June 2019. Version 1.0.0 dated October 2021 - changes made to core document England NAA.


Publisher History

National Highways is a government company, with responsibility for operating, maintaining and improving motorways and major A roads in England. It works with the Department for Transport and was previously known as Highways England and Highways Agency.



NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

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