We’ve got all the right pieces.
But even the most flexible stormwater products won’t arrange themselves. To succeed in this rapidly changing environment, you need a partner to help you navigate the complexities of local regulations – someone who is responsive to your requests, saves your customers money and accelerates the design process. That’s why Contech is the trusted partner you can count on for stormwater management solutions.
Our local contacts are experts who are ready to help!
Stormwater management is becoming increasingly complex as regulations become more strict with each permit cycle. It’s no longer enough to simply move water away from a site—we are now often required to retain and treat it. Traditional methods and BMPs simply aren’t enough to address these evolving challenges effectively.
To succeed in this rapidly changing environment, you need a partner to help you navigate the complexities of local, state and federal regulations — one who is responsive to your requests and provides innovative solutions that save your clients money and accelerate the design process.
In addition to stormwater expertise, Contech offers a wide range of innovative, flexible product solutions engineered to solve your site’s unique challenges and reduce long-term maintenance costs. From traditional BMPs to LID solutions, our ongoing investment in robust laboratory and field evaluations ensures we have a variety of solutions to comply with local regulations so your projects get approved the first time. With our responsive team of stormwater experts, local regulatory expertise and flexible stormwater management solutions, Contech is the trusted partner you can count on for all your stormwater management needs.
Provide engineers with technically focused recommendations
Help engineers develop an
efficient solution
Make sure all recommendations
are approved locally
Support contractors and owners through the entire process
Stormwater Filtration Solutions
Contech routinely provides engineers with design drawings, sizing documentation, operation and maintenance guidance, and performance verification documentation for inclusion in stormwater management plans. Because local plan check requirements vary, please contact your local Contech Stormwater Consultant to develop a submittal package tailored to your project’s specific needs.
No, Contech does not currently offer a plastic crate detention system. Contech has chosen not to manufacture this type of system due to concerns about long-term access, inspection, and maintenance.
Underground detention systems collect sediment, trash, and debris over time, so the ability to inspect and clean the system is an important design consideration. Many plastic crate systems have limited internal access, which can make it difficult to verify system conditions, remove accumulated material, or perform maintenance throughout the life of the project.
Instead, Contech focuses on underground detention solutions that provide accessible storage, including corrugated metal pipe, steel-reinforced polyethylene pipe, ChamberMaxx plastic chamber systems and UrbanPond precast concrete detention systems. These systems can be designed with manholes, risers, cleanouts, and other access points to support long-term inspection and maintenance.
Contech stormwater treatment systems can be configured upstream or downstream of a variety of detention systems, including above-ground ponds and underground detention systems.
The detention systems may be concrete, metal or plastic, depending on site needs. Contech manufactures detention systems in each material type to accommodate a variety of site conditions. The final configuration should be reviewed by the project engineer to confirm proper sizing, hydraulic grade line, bypass requirements, access, maintenance approach, and local agency approval.
Municipal stormwater flow rates and pollutant concentrations are highly variable over the course of a storm, between storms, seasonally, and with changing activity in the contributing watershed. Because of this variability, no stormwater control measure (SCM) is going to perform exactly the same on a given site, nor can anyone guarantee a particular SCM will always achieve a specific level of pollutant removal will be achieved on a given site. However, Contech conducts extensive testing on our products to establish their capabilities over a range of representative influent conditions.
Contech systems certified through the Washington State Department of Ecology TAPE program have been evaluated using field data from at least 15 qualifying storm events. This helps capture the natural variability expected at real-world sites. TAPE certification indicates that the system has demonstrated the ability to meet the applicable performance goals under the program’s testing criteria, provided the system is properly designed, installed, operated, and maintained. Unusual influent conditions, atypical pollutant characteristics, extreme loading, or inadequate maintenance can affect performance and should be considered when setting expectations.
Systems certified by the New Jersey Department of Environmental Protection have been independently verified to provide specific sediment removal performance at approved flow rates under laboratory testing conditions. NJDEP testing uses silica particles with a controlled particle size distribution as a surrogate for typical stormwater solids. In actual field applications, the particle size distribution, density, organic content, and composition of stormwater solids can vary significantly over time. So, while NJDEP certification provides a valuable benchmark for comparing the relative sediment removal capabilities of stormwater control measures, it should not be interpreted as a guarantee of identical performance under all field conditions.
The best BMP for a shallow site depends on the available rim-to-invert depth, pipe sizes, hydraulic grade line, treatment requirements, and whether the BMP is at-grade or underground.
For shallow sites, compact systems such as Vortechs, Filterra, the Modular Wetland Linear, Jellyfish Filter, StormFilter, or certain inlet-based treatment systems may be considered depending on the pollutant removal goal and local agency acceptance. In general, shallow sites require early coordination because the controlling factor is often not just the BMP height, but the combination of inlet pipe elevation, outlet pipe elevation, bypass routing, maintenance access, and hydraulic head loss. Your local Contech Stormwater Consultant can help evaluate available depth and recommend feasible BMP options for the project.
