Units of Measure Units of Measure Metric (mm, m) U.S. Customary Units (Inches, Feet)

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Country Country *AustraliaCanadaNew ZealandNorwayU.KU.S.AOther

Is this a new or existing culvert? Is this a new or existing culvert?NewExisting

Culvert Identification?

Project Location

Culvert Length (Meters)

Culvert Width/Diameter (Millimeters)

Culvert Length (Feet)

Culvert Width/Diameter (Inches)

Culvert Shape Culvert Shape *Rounded BottomFlat Bottom

Culvert Gradient (%) Culvert Gradient (%) *Less than 1.0%1.0 - 2.0%2.01 - 3.0%3.01 - 5.0%5.01 - 8.0%Greater than 8.0%

Culvert Material? Culvert Material? *PlasticConcreteSteel

Preferred Baffle Height? Preferred Baffle Height? 100mm 150mm Which baffle height should I choose? FlexiBaffles are available in 100mm and 150mm heights. Taller baffles create deeper rest pools but can be harder to install in smaller culverts. For round culverts under 1600mm, and flat-bottom culverts under 1200 mm, we recommend using the 100mm baffles. Learn more

Preferred Baffle Height? Preferred Baffle Height? 6" 10" Which baffle height should I choose? FlexiBaffles are available in 6” and 10” heights. Taller baffles create deeper rest pools but can be harder to install in smaller round culverts. Learn more

Do you want offset installation? Do you want offset installation? Yes No Offset vs Centred - what’s the difference? Round Culverts: Offset baffles guide water around one end at low flows, making calmer rest pools and easier passage. Centred baffles slow the full flow and can hold more bed material. Flat-Bottom Culverts: Offset baffles are about 20% shorter and alternate left/right to meander the flow, while centred ones run wall-to-wall and retain bed material. Learn more

Is the culvert perched? Is the culvert perched? Yes, there’s a drop at the outlet No, it’s flush with the streambed What is a perched culvert? A culvert where the outlet hangs above the streambed, often because of erosion or because fish passage wasn’t considered when it was built. This creates a drop that fish can’t swim or jump past. Learn more

Does this culvert have an apron? Does this culvert have an apron? No Yes What is a culvert apron? An apron is the flat concrete slab built at the outlet, and sometimes the inlet, of a culvert. It helps protect against erosion but can also create barriers to fish passage. Learn more

Does the apron require fish passage? Does the apron require fish passage? *YesNo

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