Understanding your local requirements for culvert and drainage projects isn't always straightforward. Below you'll find some of the basics you'll need to know when shopping for culverts, as well as some beneficial tools and resources to help make shopping for culverts an easier experience. These are some of the most common questions we're asked when our clients are researching culverts, and we hope these resources can help you in your journey.
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If you have additional questions, we're here to help on-site at Elcho Road, Wellandport. Or both and at 905-386- or .
There are two common types of culverts, Corrugated Steel Pipe (CSP) and High-Density Polyethylene Pipe (HDPE). CSP is available in multiple factory-applied finishes to accommodate the wide variety of performance and hydrology considerations including Galvanized, Aluminized Type 2, and Polymer- Laminated. HDPE BOSS ranges from 100mm to 900mm in diameter. It combines a smooth interior wall and annular exterior corrugations for gravity-flow drainage applications.
CSP offers the optimum combination of strength, flexibility and performance, and is available in round or pipe arch profiles.
HDPE BOSS is more lightweight and cost-effective when compared to CSP. While maintaining durability, chemical resistance, and UV resistance.
To learn more about the general installation guidelines of CSP, view this Corrugated Steel Pipe Institute (CSPI) installation manual.
The CSPI is the association of Canadian corrugated steel pipe (CSP) manufacturers. An impartial organization that works with manufacturers, engineers, and municipalities around the world to gather data and information.
Our HDPE culverts are manufactured by Armtech, as a part of their BOSS product line. For Installation steps, view page 5 of our HDPE culvert brochure.
Culvert warranties are case-specific. Let us know if you have any issues and we will assess the situation to find a solution. Make sure to follow proper installation procedures to reduce the risk of issues. Most importantly, ensure that the product you're buying is the correct one for your job. We're more than happy to assist you with the process of culvert selection.
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We highly recommend checking your local municipal requirements prior to purchasing your culvert. Municipalities can have specific regulations for where or how HDPE and CSP culverts can be installed.
CSP: Manufactured to CSA Standard G401
HDPE: Manufactured to meet or exceed the cell class requirements of ASTM D.
Roadauthority.com offers some guidelines, information, and prequalification's for specific culverts being used in public infrastructure. They also offer links to the CSP and HDPE culverts available at Ontario Agra. Both our CSP and HDPE culverts are fully certified to meet or exceed municipal requirements.
If you have any questions that weren't addressed in this article, please reach out to our sales team for assistance. With years of knowledge and experience across the province, we've got the answers you're looking for.
(905) 386- | | Elcho Road, Wellandport, ON
Another type is to reserve a comparable area on-site designated for mitigation alternatives like constructed or revitalized wetlands. 7 In some cases, the cost of mitigation can end up being even more expensive than the culvert itself. This might be a good time to compare what the cost of a bridge might be. Permitting authorities can be hesitant to approve a culvert because of its environmental impact, which includes waterway constraints and possible flood risk. These culvert impacts can include: clearing out the immediate natural surroundings, changing the flow of water, and filling in the surrounding landscape with dirt to buffer the culvert while supporting the above roadway.
Obtaining a permit for culvert installation can result in high mitigation costs. The price of mitigation can push the costs of a culvert over the price of a bridge. Mitigation is the act of 'replacing' one environmental impact with an equivalent investment of another to offset the environmental impact of your project. 7,8 There are two main types of mitigation. One type is to pay impact fees that are typically associated with the square footage or acreage of the affected area.
There are three interrelated things to consider when evaluating the functional longevity of a bridge or culvert solution: design, maintenance, and risk.
What is it about design that affects resiliency in a bridge versus a culvert? A culvert is often a cookie-cutter element that can significantly alter the natural processes. In addition, a culvert is sometimes designed to accommodate flow but not necessarily clear the 100-year flood elevation; meaning that in some cases the 100-year flood elevation can exceed the designed roadway elevation and during extreme flooding, excess water is then expected to cross the roadway.10 Alternatively, bridges are typically designed with a bridge's low chord above the 100-year Elevation. A YBC bridge design is always recommended to be a minimum of 12 inches above the 100-year Flood Elevation. This element of bridge design helps to increase flood flow area, clearance for debris, and reduces the overall risk of adverse impacts during flood events.
What is typical for responsible maintenance of a bridge versus a culvert? It's important to note that all roadways require a general level of maintenance, including keeping the path of travel clear, maintaining the surrounding areas, and performing routine inspections. For a YBC timber bridge, the low-maintenance recommendations include every 2 to 4 years general tightening of fasteners and updating the coatings. In contrast, culverts may require frequent cleaning out of debris to prevent clogging. Additionally, all crossings typically require an inspection about every two years. The frequency of inspection depends on the legal requirements per state.
Now that the design and maintenance roles have been evaluated for bridges versus culverts; how do they influence risks? As far as risks are concerned, there are two levels of risk: risk of improper maintenance and risk of design failure. An improperly maintained bridge or culvert of any type runs the risk of a reduced life span and capacity that's attributed to negligence. However, in the case of a YBC bridge, if low-maintenance design elements and regular inspection recommendations are followed, then it is unlikely to pose risks of hidden threats. Alternatively, an improperly maintained or clogged culvert can collapse and cause flooding, roadway failures, or other harmful environmental impacts.6 In the event of flooding, which is one of the greatest risks of nature that a bridge or culvert design will be subjected to, the weather intensities are greater than average conditions. When exposed to flooding, a bridge design has a reduced risk of failure because it can traditionally withstand flooding better than a culvert due to design requirements and increased clearances.7 In contrast, a culvert design inundated with increased flow and accompanying debris can be adversely impacted and potentially fail under the heightened storm conditions.10
Contact us to discuss your requirements of Corrugated Steel Headwalls Suppliers. Our experienced sales team can help you identify the options that best suit your needs.