There are hundreds of thousands of culverts across the UK providing a means for railways, highways, canals, footpaths etc. to cross watercourses. Some of these culverts also have screens for security purposes or debris management. There are also numerous highway drainage outfalls.
Culverts, screens and outfalls are superficially simple structures, but they have the potential to restrict flow (causing flooding), can be more expensive to maintain than open channels or soakaways, and can adversely affect the aquatic environment and create new health and safety hazards. As a result, there is a presumption against the construction of new or replacement culverts.
Assessment of the hydraulic performance of a culvert, screen or outfall can be complex. This manual provides a number of methods from hand calculation to computer modelling to assist.
In service, a well-designed culvert or outfall may require little attention from an asset manager other than routine inspection and maintenance. It should also not require a screen. However, there are thousands of existing culverts, screens and outfalls across the UK, many where conditions have been significantly altered by urban development, climate change and concern about the quality of the natural environment. Problems of decaying structural fabric, sedimentation, blockage by debris, and inadequate capacity present an asset manager with a constant demand for assessment, rehabilitation, repair and enhancement. Also, there are increasing environmental and potential liability pressures, driven in part by legislation, that require asset managers to examine options for improving the environmental, hydraulic and health and safety performance of culverts, screens and outfalls, including restoring the watercourse back to a more natural state by means of ‘daylighting’ and removal of screens that are no longer necessary.
This event will provide an overview of how the new manual will help understand, consider and address the above challenges.
It will also provide information on how to download this free manual.
This CIRIA project was funded by the Environment Agency, Network Rail, Highways England, Transport Scotland and written under contract to CIRIA by JBA Consulting and Mott MacDonald.
NOTE: A complementary webinar launching the new Environment Agency Blockage Management Guide is also being arranged.
See below for further details.
- To understand how the new guidance helps with the design, assessment, modification and removal of culverts.
- To understand the principal differences between the new guide and the CIRIA, Environment Agency and Highways England documents on which it is based
10:00 Introduction and background to project: Owen Jenkins, CIRIA
10:10 Overview of document, - Jeremy Benn, JBA Consulting
10:30 Principal changes – Amanda Kitchen, Mott MacDonald
10:50 Questions and discussions
Who should attend
Asset managers, consulting engineers and scientists, flood risk management practitioners, local authority, highway and drainage engineers, infrastructure planners, environmental professionals, regulators
Friday 13th December 2019
10:00 - 11:30
FREE for all to attend
Please sign in or create an account to register for this event.
The link to attend the webinar is strictly personal and should not be shared.
CPD certificates will only be issued to attendees registered on our booking system
prior to the webinar.
If you are experiencing issues registering for this event online please contact us on
020 7549 3300 or email email@example.com.
Joining instructions will be sent 10 days before the webinar
Terms and Conditions
Click here for details of our terms and conditions that will apply.
A complementary webinar is being arranged by the Environment Agency to launch the new Blockage Management Guide
To register to attend, please contact firstname.lastname@example.org
10th December 2019 (10:15- 11:15)
For further information on CIRIA membership and other services, please contact:
Tel: 020 7549 3300
Fax: 020 7549 3349