The Most Common Crossings are Bridges, Culverts, and Fords
All Crossings need to consider:
- Peak Flows – Will the crossing allow enough water through during high flows?
- Will debris or ice be able to flow through?
- Fish / Aquatic Life Forms Passage – Will the crossing allow fish and/or aquatic life forms to move freely?
- Weight Allowance – Will the crossing be able to handle the weight of trucks that may not be frequent (i.e. a fire truck)?
- Span – Bridges are generally for wider crossings. Culverts are for narrower/smaller crossings.
- If a span is greater than 20′, a bridge may be required.
- Proper Siting – A stable, relatively-straight crossing is critical.
- Flood Plain – If the crossing is in a flood plain, you will want to contact your local city/county floodplain manager for their regulations and permits.