Enviro Span

Enviro Span

About

Enviro Span has developed the 'next generation' re-usable bottomless culvert with a combination of thoughtful design, and new material technology. The Culvert is an innovative, environmentally‐friendly, and cost effective modular stream crossing culvert system. 

Government agencies, the general public, and companies alike, are demanding water crossings that respect and maintain the natural environment and water quality. Furthermore, they are requiring longevity and a reduction in the cost of long term maintenance. In the new world of environmental responsibility, sensitivity and sustainability, the old culvert model is no longer appropriate in many applications. Something innovative was required to bridge the culvert industry from old to new, and Enviro Span is that bridge.

The advantages of Enviro Span are both numerous and remarkable, and once seen and used, self explanatory. These include the virtual elimination of both in-stream and stream bank disturbance, simplification and cost reduction of installation and shipping, elimination of leached toxins, extension of life span, reusability, and increased endurance under extreme conditions. From the beginning to the end of the process, delivering, installing, and de-activating a stream crossing, improvements have been designed into Enviro Span.

Both the design and the material (a type of engineering thermoset resin) performed above expectations and far exceeded current North American standards (both Canada and the USA) for load bearing capacity. Finite Element Analysis (FEA) for a live load rating of L150 (BC 150 imperial ton 5-axle configuration) using .91 metres (36 inches) of un-compacted fill results indicated combined stresses from axial thrust and bending moment that are within Canadian Bridge Code limits for all wheel loading cases examined.
 

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