Comparing Velpont to Common Crossing Types
One system. Fewer compromises. See how Velpont compares to conventional crossings on speed, durability, environmental impact, and more.
Velpont Modular, open-bottom bridge system | Pipe Culvert Pipe that carries water under the road | Box Culvert Concrete box under the road | Other Bridges Traditional bridges (cast-in-place, arch, timber) | |
|---|---|---|---|---|
| Stream Impact | Spans channel; stream flows along natural bed | Constrains flow through pipe | Constrains flow through rectangular opening | Typically spans channel depending on design |
| Streambed Excavation | Minimal to none | Excavated and rebuilt | Excavated and rebuilt | Often required depending on foundation |
| Installation Location | Primarily from streambanks | In-stream and at road base | In-stream and at road base | Often requires in-stream work and staging |
| Installation Approach | Precast modular components assembled on site | Pipe placement with backfill and reconstruction | Precast or cast-in-place with significant excavation | Site-built or large precast elements with extensive formwork |
| Design Flexibility | Modular system configured to site needs | Limited by pipe size and alignment | Limited by box dimensions | High, often fully custom |
| Environmental Considerations | Supports natural flow, sediment, aquatic passage | Can disrupt flow and organism passage | Improved opening but interrupts continuity | Varies by design and construction method |
| Permitting Complexity | Often simpler due to minimal in-stream work | Often more complex due to disturbance | Often more complex due to disturbance | Typically more complex and site-specific |
| Durability Outlook | Reinforced precast concrete designed for long-term service | Material-dependent; often shorter service life | Longer service life | Longer term for concrete, shorter for timber |
Think Outside the Box
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Frequently Asked Questions
What are Velpont bridges made of, and why are they better than traditional bridge options?
Velpont bridges are made from precast, wet cast concrete. Wet cast concrete has a lower porosity than dry cast options, which helps reduce expansion and contraction during freeze–thaw cycles. Compared to steel culverts, precast concrete is also more resistant to corrosion caused by water and road salt. And unlike cast-in-place bridges, which are more prone to cracking and surface imperfections, Velpont bridges offer a more consistent, natural finish and long-term durability.
Why are Velpont bridges better for crossings prone to flooding?
Unlike culverts and box crossings, which constrict channels, Velpont bridges are designed to let the stream follow its natural bed, preventing unnatural acceleration, reducing downstream erosion, and eliminating perching that traps debris and causes washouts. These features are helpful in areas prone to heavy flooding and water fluctuations.