- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 01 Oct 2020
Typically culverts are box shaped, round or elliptical in cross section. They are often pre-fabricated and can be made from pipes, reinforced concrete or other materials that are embedded within the surrounding landscape to create a bridge-like structure that permits the stable and proper flow of water under an obstacle such as a road, and can help alleviate flooding and reduce erosion.
The difference between a bridge and a culvert is that a bridge is intended to allow passage over an obstacle such as a body of water, whereas a culvert is intended to permit a body of water to pass under an obstacle such as a road. A culvert is provided for the ‘benefit’ of the water, and typically has a base over which the water flows. A bridge is provided for the passage of traffic, and provides a base over which that traffic can pass.
Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019, defines a culvert as: 'A covered channel or pipe which prevents the obstruction of a watercourse or drainage path by an artificial construction.' It also gives the following definitions:
- Culvert condition appraisal as: ‘…the range of activities involved with the qualitative evaluation of an asset’s condition and performance (ie the gathering of existing data, inspection, investigation and structural assessment).’
- Condition assessment is: ‘ A measure or measures of the culvert carried our as a precursor to the performance assessment, for example, measurements of degrees of sedimentation or in situ tests on the fabric of the culvert.’
- Performance assessment is: ‘A comparison of present performance against performance requirements. The assessment considers the effect of a condition on each performance requirement and the effect of each performance requirement on the performance of the subsystem or system. The key to performance assessment is an understanding of the link between asset (or system) condition and its response under a range of loading conditions. Outputs of this stage are the probability of failure and residual life.
- Condition monitoring is: ‘Continuous or periodic inspection, assessment, measurement and interpretation of the resultant data to indicate the condition of the specific component. This will determine the need for some preventative or remedial action.’
 Related articles on Designing Buildings Wiki
- Catchment flood management plans.
- Detention pond.
- Environment Agency.
- Flood and water management act.
- Flood insurance.
- Flood risk management plans
- Flood risk.
- Highway drainage.
- Pitt Review Lessons learned from the 2007 floods.
- Rainwater harvesting.
- River engineering.
- Safe working in drains and sewers.
- Sewer construction.
- Sustainable Urban Drainage Systems.
- Water engineering.
- Workplace design – flood protection.
Featured articles and news
Design needs to be more diverse to be widely accessible.
It’s not always a case of the centre leading.
PHribbon toolbar developed for US market.
CIOB consultation seeks feedback on APPG 2020 report.
How to respond to changes made in the October 2021 update.
Resource provides professional installation assistance.
Adaptive planning proposal spans 15 years.
Activities summarised by the Construction Industry Council.
How Islamic architecture shaped Europe. Book review.