The culvert must be designed to handle the specific water flow conditions it will encounter. This includes considering peak flow rates and any possible flood scenarios. The size of the culvert is determined based on these water flow calculations, and it must be large enough to prevent backups or erosion. 2. Soil and Geotechnical Conditions More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.