Upsize culverts and other stormwater management infrastructure (e.g., pipes, drains, etc.) where necessary.
High – increasing culvert capacity can reduce both flood and landslide risk by minimizing surface runoff; however it can push flooding further downstream
Low – it is generally cost-prohibitive to modify large-scale engineered infrastructure once constructed
Community concern about flooding; cost
Ensure that upsizing culverts does not have negative impacts for downstream communities, or mitigate downstream impacts with additional measures.
