Detention & Infiltration
How much stormwater does your project need to manage?
Our detention and infiltration storage systems can run the size of a football field or a small local park. We build reinforced box culvert sections and spanning slabs to meet large and small scale requirements for development and retrofit projects. One and done.
Our structures support project-specific storage volumes, runoff flow rates, water quality, and erosion control goals. Where space is tight and land costs are high, our detention and infiltration systems can maximize your intended development use.
Biofiltration & Bioretention
Does your stormwater project call for a smaller footprint?
With specially engineered filter media, our biofiltration and bioretention systems can treat higher flows than conventional units, allowing a small footprint size and lower overall costs.
Efficiently remove total suspended solids, metals, nutrients, oil, and grease from stormwater runoff to meet quality standards as a low impact development best management practice.
StormVault Biofiltration Lands on Hawaii’s Oahu
Developers of the new Mililani Self-Storage facility on the Hawaiian Island of Oahu needed to comply with local regulations for managing stormwater. Jensen Precast had a solution – the economical, modular StormVault Biofiltration System will treat area stormwater runoff before it discharges from the storage site to the Waikakalaua stream running adjacent to the development.
Hydrodynamic Separation
Is full trash capture part of your stormwater project requirements?
Our hydrodynamic separation units screen and capture 100% of stormwater trash and debris > 5 millimeters. Along with floatables and neutrally/negatively buoyant materials, our hydrodynamic separators capture total suspended solids, oil, grease, and other total petroleum hydrocarbon pollutants from stormwater runoff all without blocking the screen.
Captured pollutants are retained without scouring, even under high-flow bypass conditions. With no moving parts, our hydrodynamic separators are best in class and agency approved.
- Leverage proven continuous deflective treatment process for full capture of 100% of trash and debris ≥5mm.
- Treat large flow ranges from .7 to 83 CFS with inline and offline units
- Save with the most cost effective treatment method per CFS of stormwater as compared to other structural BMPs.
- Meet full capture requirements with state certified treatment systems.
- Bid an equivalent system directly from the manufacturer to save time and money.
- Receive a complete package quote that includes all your precast sewer and storm drainage products.
- Install using standard methods with a JDS unit configured inside a precast manhole set below grade
- Maintain your system easily and safely by opening the unit through multiple large accessways and removing trash and debris with a standard vacuum truck.
Sedimentation Capture and Release
Do you need a tried and true basic method for managing stormwater quality and volume control?
Our high velocity interceptor is designed to capture and retain trash, grease, oil, sand, and grit found on streets and parking lots for all around gross pollutant management.
Designed to capture up to 85% of all runoff and slowly release it to receiving waters, this capture and controlled release product is specifically designed to catch small particles and minimize their resuspension by treating runoff containing the highest percentage of pollutants, including first flush of larger events and peak flow attenuation to reduce downstream erosion.
Coalescing Separation
Does your project call for separating liquid from liquid?
Our coalescing plate separators feature enhanced gravity oil, water, and sediment separation solutions. Using plate separator technology, coalescing systems are the true method of separating a liquid from a liquid, as well as fine total suspended solids. Oil sorbent mats enable the permanent capture of free oil and grease, reducing the level of maintenance. Standard units as well as customized designs are available to address project-specific needs