How bad is a culvert?

Culverts limit the movements of migratory fish like the critically endangered European eel, disrupting their access to food and spawning areas. When fish are blocked from making these essential journeys, entire freshwater ecosystems suffer.

How are culverts installed?

All storm sewers and culverts must be installed with the area under the haunches well compacted and all voids filled. For corrugated steel pipe, the most popular method of preparing the founda- tion is by excavating to a flat surface and then carefully tamping the fill under the haunches of the pipe.