DuroMaxx® SRPE emerges as an important solution for containment needs, offering cost-effectiveness and mitigating schedule impacts caused by supply shortages in the market for FRP, CIP, and pre-cast concrete containment tanks ..read more

Stormwater management is a critical aspect of sustainable urban development, and hydrodynamic separators (HDS) play a vital role in this process. In this blog post, we delve into the intricacies of HDS devices, looking at the different components, each serving a specific purpose in removing and retaining stormwater pollutants while adhering to hydraulic requirements ..read more

Stormwater quality regulations continue to expand to include treatment criteria for total phosphorus. Phosphorus is now the second-most-regulated pollutant in stormwater runoff after total suspended solids. While much has been written about BMPs used to remove total phosphorus, we shouldn’t underestimate the role BMP maintenance has on reducing phosphorus levels. More specifically, we should take into account the timing of maintenance events and the type of maintenance being performed ..read more

We are an industry of abbreviations and acronyms. The terms we use daily can sometimes hold a general or broad meaning in our minds, but the actual definition ..read more

Eliminating illicit discharges within our storm sewers through an illicit discharge detection and elimination (IDDE) program is critical to improving the overall health of local waterways. Illicit discharges, like stormwater runoff generated within the municipal separate storm sewer system (MS4), flow directly into a receiving waterbody. Whereas post-construction stormwater control measures (SCMs) are designed to reduce typical pollutants (e.g. sediment, trash, and nutrients) in stormwater runoff prior to it entering receiving waters, illicit discharges pose a unique challenge because they con ..read more

In civil engineering and stormwater management, a design storm refers to a specific rainfall event defined and described by the statistical likelihood of the event occurring in a given rainfall year. Design storms are used as a standard for designing and evaluating stormwater infrastructure. For example, local stormwater standards commonly call out the 1, 2, 5, 10, 50, and 100-year storm events and the water quality storm event for a given geography, each of which plays a role in the design and implementation of stormwater infrastructure ..read more

Red flags are design elements that are commonly or easily overlooked and may need extra attention when designing. Considering the red flags upfront will expedite the design and fabrication process, and eliminate delays, installation, and performance issues ..read more

As stormwater quality regulations become increasingly stringent, civil engineers are turning to stormwater filtration Best Management Practices (BMPs) to meet the demand for higher pollutant removal efficiency. In this blog post, we will explore the fundamentals of stormwater filtration, focusing on pollutant removal mechanisms, sizing methods, filtration mediums, and the advantages of proprietary systems ..read more

Proper pipe jointing is a critical aspect of designing and installing sanitary sewer systems – especially in the sizeable diameters of 30” and larger. The large joints of these systems play a pivotal role in preventing issues related to infiltration and exfiltration, which can have detrimental effects on the overall functionality of the infrastructure. Inflow and infiltration (I&I) during rain events can lead to capacity issues at wastewater treatment plants, causing severe backups in the system and sanitary sewer overflows (SSOs ..read more

The terms “high-rate biofiltration” and “runoff reduction” aren’t often used in the same sentence. The engineering community has a preconceived notion that a high-rate biofilter with an underdrain (like Filterra®) can’t provide runoff reduction benefits because the stormwater it treats moves through the practice too quickly. However, with the proper design considerations, we can maximize the capability of a high-rate biofilter to provide appreciable runoff reduction ..read more