Canadian Underground Infrastructure Logo

Bioswale to Address Stormwater Concerns for City Of Cornwall

0069/17082_en_c1af8_3017_c01-cornwall-seventh7-lid-lowimpactdevelpment-before.jpg

More frequent storm events of ever-increasing intensity, which many attribute to climate change, have prompted municipalities across Canada to look at ways to guard against flooding to homes and businesses.

One need only look at the damage done to southern Alberta when several rivers overflowed their banks in 2013, or the Red River Flood of 1997, which inundated 2,000 square kilometres when the Red River rose 12 metres, to see the risks of failing to protect against Mother Nature.

Following the flood in Calgary, the city repaired critical sites along the riverbank that had eroded, and developed new computer models to assist with emergency response planning.

Cornwall, Ontario also undertook to review flooding mechanisms and its flood abatement measures when in 2013, a once-in-a-century probability storm caused sewer backups affecting several hundred homes. The event was the second such 1:100 probability event within a three-year period that challenged Cornwall’s infrastructure capacity to handle intense volumes of stormwater and residents’ patience in dealing with unpleasant and costly sewer backups.

The city of 47,000, located southeast of Ottawa on the St. Lawrence River, thus developed a strategy, called the “Cornwall Blueprint”. This is a comprehensive urban water awareness strategy with an initial imperative aimed at mitigating basement flooding and increasing residents’ awareness of sewer infrastructure – both on private property as well as that belonging to the municipality.

A key element of the Blueprint has been to develop a rebate strategy for homeowners encouraging them to undertake changes at their home to reduce the risk of basement flooding attributable to sewer backup. The objectives of the rebate are three-fold: reduce the risk of flooding caused by sewer backups; reduce the contribution from storm runoff and groundwater to the municipal sanitary sewer network; and encourage open dialogue between City staff and residents about flooding causes and protection. Homeowners are eligible for up to a $3,600 rebate towards costs incurred to flood-mitigate their homes. Such measures include disconnecting eavestrough downspouts and foundation drains, lot-grading improvements, and installing backwater valves and sump pumps. We quickly learned that a successful program needed a strong citizen engagement component as public knowledge of buried municipal infrastructure was limited. The program has been very successful to date with more than 200 applicants in the first year alone.

The City has also undertaken and planned comprehensive efforts to inspect and rehabilitate aging sewers and manholes, in particular in flood-prone neighbourhoods, to reduce excess stormwater contributions (so-called infiltration and inflow, or I/I). The I/I from aging infrastructure and from the homes can quickly deplete sanitary sewer capacity in an intense storm event thus contributing to sewer backups.

Bioswale an Eastern Ontario first

The Blueprint also includes some other innovative aspects such as a Low Impact Development (LID) demonstration project. LID is a keypart of a so-called Green Infrastructure design strategy for stormwater management. For this, the City is undertaking to construct a “bioswale” as part of a road re-construction and sanitary sewer separation project. The bioswale will serve as a bioretention facility essentially to temporarily capture and treat rainwater runoff thus relieving pressure on the city’s stormwater conveyance system.

Designed to remove solids and nutrients from runoff water, a bioswale is also helpful in reducing peak stormwater flows, which is its primary purpose as conceived by the City of Cornwall. 

The $500,000 project to build a bioswale – essentially a sand and compost media filled trench running along both sides of Seventh Street for about 200 metres – is a first for Cornwall and rare for Eastern Ontario, according to John St. Marseille, P.Geo., P.Eng., general manager, infrastructure and municipal works with the City of Cornwall.

St. Marseille explained the bioswale as a relatively new design philosophy of stormwater management called “low impact development,” (LID) whereby new or existing water infrastructure is blended into the natural environment in a holistic way. Contemporary stormwater management attenuates post-development runoff rates and addresses water quality treatment. However, volumes are still significantly increased. LID enables urban runoff to more closely approximate a natural environment, including water cooling and groundwater recharge.

“We look at design criteria for water quality. We look at erosion control. We look at opportunities for infiltration. We look at the whole water balance approach,” he said. “If you can try to mimic how that water would be retained and attenuated onsite without rapidly conveying it away and pushing the problem further downstream, that’s the design philosophy.” We have retained the consulting firm Aquafor Beech to provide design support.

St. Marseille compared the bioswale, which will be constructed beginning this spring, to a kind of “sponge”. 

“The sponge has the ability to absorb water. Ultimately, the sponge will be saturated and there’s going to be some excess water contribution but ideally that occurs only after the storm event has diminished. Most of that water will thus percolate into the ground rather than to go through the storm sewer pipes.”

Perforated pipes will be placed throughout the bioswale, shallow enough to allow the water level to build up before it is conveyed through the pipes into the storm water system. The perforated pipe size and depth are purposely designed to act as kind of ‘safety valve’ – thus most of the stormwater running off the road merely infiltrates into the subsurface in the bioswale. The system will be monitored after construction to verify performance. An added benefit should come in the form of downsized stormwater pipes, thus saving the municipality potential infrastructure costs in the future. The environmental benefit is the improved stormwater quality afforded by the bioswales.

Along with stormwater retention and treatment, the bioswale is also seen as an opportunity for neighbourhood beautification. Residents will be invited to choose from a selection of greenery they want to see growing in the portion of the bioswale fronting their homes. For example perennial grasses, small shrubs or trees are possibilities. “Those are pretty appealing and do a lot for neighbourhood enhancement and to the whole streetscape,” said St. Marseille. 

Sewer rehab diverts sanitary flow

Another important element of the Cornwall Blueprint is a plan to rehabilitate the sewer system in the Grand-Miron neighbourhood – an area prone to flooding. The two-year project has a budget of $5 million and has been assisted with a $2-million grant from the Ontario government.

The work involves construction of deeper sanitary sewers and storm sewer outlets in the Eleventh Street area and along parts of Grand and Miron Avenues, as well as a new dedicated storm sewer on Marlborough Street to free up sanitary sewer capacity, and replacement of an old pump station.

“The pumping station was passed its service life and needed to be replaced. The sewers as well needed to be reconnected into this new pumping station and we’re actually moving the sanitary flow into a different sewer catchment to relieve of the pressure on some of the other areas that have been prone to flooding,” St. Marseille explained. It is a challenging and comprehensive project that will benefit many in the City.

The project started last summer and is expected to be completed later this year. According to St. Marseille, it will take more than one strategy to reduce the incidents of basement flooding – hence the multifaceted approach that is behind the Cornwall Blueprint.

“If it were as simple as one single component that was contributing to the excess water into our system, we’d just repair it and that would be it,” he said, but “with aging infrastructure and more frequent and intense storms ‘flooding by a thousand drips’ has been the operative expression here so we have to deal with this one drip at a time.”

More frequent storm events of ever-increasing intensity, which many attribute to climate change, have prompted municipalities across Canada to look at ways to guard against flooding to homes and businesses.

One need only look at the damage done to southern Alberta when several rivers overflowed their banks in 2013, or the Red River Flood of 1997, which inundated 2,000 square kilometres when the Red River rose 12 metres, to see the risks of failing to protect against Mother Nature.

Following the flood in Calgary, the city repaired critical sites along the riverbank that had eroded, and developed new computer models to assist with emergency response planning.

Cornwall, Ontario also undertook to review flooding mechanisms and its flood abatement measures when in 2013, a once-in-a-century probability storm caused sewer backups affecting several hundred homes. The event was the second such 1:100 probability event within a three-year period that challenged Cornwall’s infrastructure capacity to handle intense volumes of stormwater and residents’ patience in dealing with unpleasant and costly sewer backups.

The city of 47,000, located southeast of Ottawa on the St. Lawrence River, thus developed a strategy, called the “Cornwall Blueprint”. This is a comprehensive urban water awareness strategy with an initial imperative aimed at mitigating basement flooding and increasing residents’ awareness of sewer infrastructure – both on private property as well as that belonging to the municipality.

A key element of the Blueprint has been to develop a rebate strategy for homeowners encouraging them to undertake changes at their home to reduce the risk of basement flooding attributable to sewer backup. The objectives of the rebate are three-fold: reduce the risk of flooding caused by sewer backups; reduce the contribution from storm runoff and groundwater to the municipal sanitary sewer network; and encourage open dialogue between City staff and residents about flooding causes and protection. Homeowners are eligible for up to a $3,600 rebate towards costs incurred to flood-mitigate their homes. Such measures include disconnecting eavestrough downspouts and foundation drains, lot-grading improvements, and installing backwater valves and sump pumps. We quickly learned that a successful program needed a strong citizen engagement component as public knowledge of buried municipal infrastructure was limited. The program has been very successful to date with more than 200 applicants in the first year alone.

The City has also undertaken and planned comprehensive efforts to inspect and rehabilitate aging sewers and manholes, in particular in flood-prone neighbourhoods, to reduce excess stormwater contributions (so-called infiltration and inflow, or I/I). The I/I from aging infrastructure and from the homes can quickly deplete sanitary sewer capacity in an intense storm event thus contributing to sewer backups.

Bioswale an Eastern Ontario first

The Blueprint also includes some other innovative aspects such as a Low Impact Development (LID) demonstration project. LID is a keypart of a so-called Green Infrastructure design strategy for stormwater management. For this, the City is undertaking to construct a “bioswale” as part of a road re-construction and sanitary sewer separation project. The bioswale will serve as a bioretention facility essentially to temporarily capture and treat rainwater runoff thus relieving pressure on the city’s stormwater conveyance system.

Designed to remove solids and nutrients from runoff water, a bioswale is also helpful in reducing peak stormwater flows, which is its primary purpose as conceived by the City of Cornwall. 

The $500,000 project to build a bioswale – essentially a sand and compost media filled trench running along both sides of Seventh Street for about 200 metres – is a first for Cornwall and rare for Eastern Ontario, according to John St. Marseille, P.Geo., P.Eng., general manager, infrastructure and municipal works with the City of Cornwall.

St. Marseille explained the bioswale as a relatively new design philosophy of stormwater management called “low impact development,” (LID) whereby new or existing water infrastructure is blended into the natural environment in a holistic way. Contemporary stormwater management attenuates post-development runoff rates and addresses water quality treatment. However, volumes are still significantly increased. LID enables urban runoff to more closely approximate a natural environment, including water cooling and groundwater recharge.

“We look at design criteria for water quality. We look at erosion control. We look at opportunities for infiltration. We look at the whole water balance approach,” he said. “If you can try to mimic how that water would be retained and attenuated onsite without rapidly conveying it away and pushing the problem further downstream, that’s the design philosophy.” We have retained the consulting firm Aquafor Beech to provide design support.

St. Marseille compared the bioswale, which will be constructed beginning this spring, to a kind of “sponge”. 

“The sponge has the ability to absorb water. Ultimately, the sponge will be saturated and there’s going to be some excess water contribution but ideally that occurs only after the storm event has diminished. Most of that water will thus percolate into the ground rather than to go through the storm sewer pipes.”

Perforated pipes will be placed throughout the bioswale, shallow enough to allow the water level to build up before it is conveyed through the pipes into the storm water system. The perforated pipe size and depth are purposely designed to act as kind of ‘safety valve’ – thus most of the stormwater running off the road merely infiltrates into the subsurface in the bioswale. The system will be monitored after construction to verify performance. An added benefit should come in the form of downsized stormwater pipes, thus saving the municipality potential infrastructure costs in the future. The environmental benefit is the improved stormwater quality afforded by the bioswales.

Along with stormwater retention and treatment, the bioswale is also seen as an opportunity for neighbourhood beautification. Residents will be invited to choose from a selection of greenery they want to see growing in the portion of the bioswale fronting their homes. For example perennial grasses, small shrubs or trees are possibilities. “Those are pretty appealing and do a lot for neighbourhood enhancement and to the whole streetscape,” said St. Marseille. 

Sewer rehab diverts sanitary flow

Another important element of the Cornwall Blueprint is a plan to rehabilitate the sewer system in the Grand-Miron neighbourhood – an area prone to flooding. The two-year project has a budget of $5 million and has been assisted with a $2-million grant from the Ontario government.

The work involves construction of deeper sanitary sewers and storm sewer outlets in the Eleventh Street area and along parts of Grand and Miron Avenues, as well as a new dedicated storm sewer on Marlborough Street to free up sanitary sewer capacity, and replacement of an old pump station.

“The pumping station was passed its service life and needed to be replaced. The sewers as well needed to be reconnected into this new pumping station and we’re actually moving the sanitary flow into a different sewer catchment to relieve of the pressure on some of the other areas that have been prone to flooding,” St. Marseille explained. It is a challenging and comprehensive project that will benefit many in the City.

The project started last summer and is expected to be completed later this year. According to St. Marseille, it will take more than one strategy to reduce the incidents of basement flooding – hence the multifaceted approach that is behind the Cornwall Blueprint.

“If it were as simple as one single component that was contributing to the excess water into our system, we’d just repair it and that would be it,” he said, but “with aging infrastructure and more frequent and intense storms ‘flooding by a thousand drips’ has been the operative expression here so we have to deal with this one drip at a time.”

More from Storm Water

New commercial development in Moncton meets strict runoff regulations

The new McLaughlin Place retail centre found the solution to meeting the local mandate of eliminating any increase in storm water runoff while maximizing the number of parking spaces. Instead of using a detention pond or sump, the designers decided to use a system of chambers under the parking lot that would collect and hold storm water runoff from the lot and rooftops. The one hectare commercial development with five buildings will open this year and is located near the Université de Moncton. Plans call for apartment buildings to be added in the future.

Dewatering pumps help reconstruct Galveston

When dealing with a construction site that is underwater or where the water table is just above sea level, contractors have to insure that the excavation stays dry and safe for workers. This can be extra challenging where you have conditions affected by water depth and conditions such as silt and sand. Additionally, these conditions may vary based on seasonal weather or tides. It is extremely important to have contractors who have investigated historical data and who monitor fluctuations in water levels and speeds of flow, thereby decreasing risks to workers and the success of the project.

Six critical emergency response steps

For many living in urban environments, mornings involve an alarm clock, a shower, a cup of coffee, and a commute of some sort – often including underground public transportation. However, while many are catching a subway on the way to work, not many understand how complex and vital their city’s underground infrastructure is to their morning routine. That is, at least, until something goes wrong.

Quebec City storm water quelled with underground chamber system

Engineers from SNC-Lavalin found the way to meet stringent storm water drainage regulations for a portion of the new Centre Vidéotron site by designing two underground retention systems. Managing storm water runoff is a prime concern for Quebec City because the area is prone to flooding. The multipurpose, 18,000-seat arena, spread out over some 7.2 hectares (18 acres), opened in September 2015.

Precast concrete box sections specified for storm water detention structure

Precast concrete box sections were specified for an underground storm water detention tank to enable the construction of the Humber Mews Townhomes project on Evans Avenue in Toronto. The system was selected because it could reduce the total peak runoff being discharged from the site during all storm events. Using precast units would reduce construction costs and time. Other pre-manufactured solutions were considered, nevertheless, a precast system was selected as the preferred option. The structure met the service life requirements through the proven durability of precast concrete.

Trimble launches new version of its smart water management software to streamline utility field operations

Trimble has announced the latest version of its smart water mapping and work management software—Trimble Unity 3.0. Trimble Unity is a cloud-based, (GIS) centric software-as-a-service (SaaS) solution for smart water management. Version 3.0 includes new features and workflows and also offers an App Builder and new integration capabilities to simplify connecting mobile workers with maps and data from back office enterprise systems.

CDS stormwater treatment

The CDS hydrodynamic separator uses swirl concentration and continuous deflective separation to screen, separate and trap trash, debris, sediment, and hydrocarbons from stormwater runoff. CDS captures and retains 100% of floatables and neutrally buoyant debris 2.4mm or larger, effectively removes sediment, and is the only non-blocking screening technology available in a stormwater treatment device.

ADS announces addition of new Stormtech chamber

Advanced Drainage Systems, Inc. (ADS) has announced that it has added a low-profile, high strength chamber to its StormTech product line. The StormTech SC-160LP Chamber is 12-inches tall with an installed volume of 15 cubic feet of water for underground infiltration and detention systems. The new unit requires 14 inches of total cover to carry AASHTO HS-20 live loads, which reduces site development costs in shallow applications by minimizing the amount of needed fill and maximizing open infiltrative areas.

Subscribe to our free newsletter

Get our newsletter

Learn more

Imbrium Systems releases new on-line Stormwater design tool

Imbrium Systems has announced the release of the new on-line PCSWMM for Stormceptor - an advanced stormwater treatment sizing and design tool. PCSWMM for Stormceptor is the fastest, easiest way to determine the most appropriate size hydrodynamic separator/ oil grit separator for your site.

DESIGN TOOL FOR STORMTECH CHAMBERS

Advanced Drainage Systems, Inc. announced a new on-line program for designing and estimating the cost of a stormwater system constructed with its StormTech Chambers. Available for free on www.ads-pipe.com, the ADS StormTech Design Tool enables engineers, owners and contractors to design customizable underground stormwater management systems. Designs are produced in both PDF and CAD formats, with data provided that allows users to estimate a total installed cost.

STORMTANK ARCH FOR LARGE FOOTPRINTS

Brentwood is extending its stormwater product line with the introduction of the StormTank Arch to provide a solution for large-footprint, subsurface stormwater management projects.

Riverside community uses fusible PVC pipe for stormwater outfall

Established in 2010 through the adoption of the Keswick Neighbourhood Structure Plan (NSP), Keswick on the River is a new community in southwest Edmonton, Alberta. Bounded by the North Saskatchewan River to the west and the Windermere Golf and Country Club to the north, the 200-acre neighbourhood is named for a quaint town in northwest England and features more than 1,500 homes that offer old world English architecture designed to look and feel like a country village. Future residents of Keswick on the River will enjoy riverside living, playgrounds, a nature trail system and easy access to Edmonton.

Storm drain system succeeds in salt marsh for mega-mall complex

In early 2014, the Tsawwassen First Nation started construction of two mega-malls. To accommodate stormwater runoff from this 73-hectare project, a large-diameter pipeline was designed and installed under the public roads surrounding the sites. The selection of the pipe needed to take into consideration corrosion resistance, due to the salt water environment, and had to offer structural strength because of the poor deltaic soil conditions in this seismically active region of British Columbia.

WEF Launches MS4 Stormwater and Green Infrastructure Awards Program

The Water Environment Federation (WEF), has announced a new national municipal stormwater and green infrastructure awards program. Developed through a cooperative agreement with the U.S. Environmental Protection Agency (EPA), the program aims to recognize high-performing regulated Municipal Separate Storm Sewer Systems (MS4s) and inspire them to exceed requirements through innovative and cost-effective approaches.

CULTEC Introduces New, Ultra-High Capacity Recharger 902HD Stormwater Chamber

CULTEC, Inc. has introduced its newest and largest chamber to the stormwater market – the Recharger 902HD. This ultra-high capacity model offers the benefit of minimizing project costs by maximizing storage volume in a given footprint. The Recharger 902HD is an ideal solution for high-volume stormwater management systems due to its lightweight maneuverability, shipping and stockpiling benefits and design flexibility.

CULTEC Launches new StormGenie Drawing Software For Streamlined Stormwater System Design

CULTEC, Inc. has released StormGenie v.2.5, the newest version of its automated drawing program. StormGenie is a convenient AutoCAD plug-in tool used by engineers, contractors and landscape architects to quickly create preliminary stormwater system proposals and final designs and generate project-specific drawings for the company’s Contactor and Recharger stormwater chambers. The updated version of the software can now draw from both CULTEC’s Stormwater Design Calculator and HydroCAD’s Chamber Wizard.

Azek Permeable Pavers

Following a two-year test of various types of pavement, The Living City Campus at Kortright, a centre of excellence for urban sustainability in Vaughan, Ontario, has shown positive results for AZEK Permeable Pavers. The Toronto & Region Conservation Authority (TRCA) incorporated the pavers as a test surface in a 1,200 sq. ft. portion of the centre’s parking area.

Subscribe to our free magazine

Get Our Magazine

Paper or Digital delivered monthly to you

Subscribe or Renew Learn more

Brentwood Introduces Stormtank

Brentwood is extending its stormwater product line with the introduction of the StormTank Pack to provide a light-duty solution for subsurface stormwater management. The Pack is a cost-effective alternative for non-load-bearing applications and is commonly utilized under landscaped areas such as parks, plazas, and backyards. It is designed for optimum infiltration and integration in bio-retention and rainwater harvesting applications.

MRAT Helping Municipalities Plan For Extreme Weather

Imagine if a municipality could plan for an extreme weather event by designing its infrastructure to minimize the damage to areas most vulnerable to flooding. The result could mean millions in savings to cities and homeowners, and to insurance companies that could be spared a costly spike in claim payouts.

Stormwater drainage system succeeds due to high performance pipe

To help control costs and meet the requirements for the deep burial of a road expansion’s new stormwater drainage line, a highly-engineered corrugated pipe from Advanced Drainage Systems, Inc. (ADS) was used. The ADS N-12 HP pipe is designed and manufactured to handle heavy dead and AASHTO designated live loads without any additional bedding or special fill. More than 1,840 feet of the pipe was used in diameters ranging from 12 to 60 inches. In one area, the 60- inch diameter corrugated pipe is covered by 21 feet of fill. The project was originally specified to use rubber-gasketed reinforced concrete pipe (RCP).

Stormwater treatment device

Brentwood Industries, Inc. is extending its stormwater product line with the launch of StormTank Shield. This device is designed to improve sumped inlet treatment and reduces pollutant discharge through gross sediment removal and oil/water separation.

Downspout removes zinc and other heavy metals from roof runoff

StormwateRx LLC, a provider of industrial stormwater treatment and filtration systems, announced the availability of Aquip Downspout, a new configuration of the Aquip stormwater filtration system specifically for attachment to roof downspouts. Aquip Downspout removes particulate and dissolved zinc and other heavy metals that are often present from facilities with zinc-coated or galvanized metal roofing or HVAC equipment. Stormwater running off of facilities with galvanized metals is a major cause of zinc pollution and aquatic toxicity in local waterways. Installing Aquip Downspout on a building with galvanized roofing can permanently reduce zinc concentrations by 98%, helping industrial facilities meet stormwater benchmarks for zinc and other metals.

Reliable check valve

Over twenty years of field operation, research, development and engineering enhancements have combined to make the Tideflex TF-1 Check Valve today’s most reliable check valve. The bill is formed into a curve that returns to a closed position every time, achieving the tightest possible seal for backflow operations, particularly at low flow rates. The eccentric, flat-bottom design allows installation where the invert of the pipe is close to the floor.  The stronger engineered spine provides long-term performance while handling water weight. When you specify the patented TF-1 Check Valve, you are guaranteed a proven record of maintenance-free backflow prevention.

Stormwater design calculator

A new and improved stormwater design calculator is now available from CULTEC, Inc. The calculator is an MS Excel-based spreadsheet for designing stormwater systems using the company’s chambers. It can be used as a standalone tool to generate report outputs based on a project’s parameters.
The calculator provides chamber specifications, a material list, and bed detail as well as calculates a cross section detail together with the breakdown of storage provided by the system. Additionally, it includes full data sheets with metric and English units to qualify project calculations. An enhanced interface includes easy navigation and product images. 

Laminate windows store energy and convert it to electricity

An innovative new patented technology transforms office building windows into “solar farms” and allows these structures to reuse collected energy and become self-sufficient in the event of a power outage. This technology also allows building owners to return electricity to the main electrical grid and generate income.

Largest electric vehicle trial in Canada

Hydro-Québec has announced that 10 Mitsubishi i-MiEVs were delivered this morning to Boucherville businesses selected for the third and final phase of the largest electric vehicle (EV) trial in Canada. The project, which was launched in 2010, will continue until the end of 2013.

Subscribe to our free newsletter

Get our newsletter

Learn more

Renewables, natural gas to dominate near-term power industry growth

Renewable energy capacity will more than triple, while doubling its overall percentage of the U.S. energy mix, by 2036. In addition, natural gas could overtake coal as the primary fuel for U.S. power generation. These conclusions and many more are among key findings from Black & Veatch’s year-end Energy Market Perspective (EMP).

Quebec outshines Ottawa with new cap-and-trade system to combat carbon emissions

The Quebec government has shown climate leadership with its announcement that its cap-and-trade system for greenhouse gas (GHG) emissions will come into effect on January 1, 2012, according to the citizen group Equiterre. Quebec joins California as the first two jurisdictions to implement this type of regulation under the Western Climate Initiative (WCI).

New edition of free stormwater modeling software

CULTEC offers a new edition of its free HydroCAD CULTEC modeling software. The company’s updated edition is available in conjunction with a release of the latest HydroCAD-9.1 version and can be downloaded at www.cultec.com/hydrocaddownload.html.

Gravelless drainage system

The lightweight EZflow gravelless drainage systems eliminate problems inherent with gravel drainage systems. These flexible pipe systems composed of polystyrene aggregate enclosed in a woven geotextile mesh are ideal for trench, curtain, landscape, foundation, retaining wall, and interceptor drains. The bundles come pre-assembled in 10-foot sections weighing only eight pounds and are available in 7, 10 and 15-inch diameters.

Gravelless drainage system

The lightweight EZflow gravelless drainage systems eliminate problems inherent with gravel drainage systems. These flexible pipe systems composed of polystyrene aggregate enclosed in a woven geotextile mesh are ideal for trench, curtain, landscape, foundation, retaining wall, and interceptor drains. The bundles come pre-assembled in 10-foot sections weighing only eight pounds and are available in 7, 10 and 15-inch diameters.

Inline CheckMate valve

The CheckMate Inline Check Valve is ideal for backflow prevention and odor mitigation. In outfalls, stormwater, CSO and SSO applications, the CheckMate’s custom-engineered, all-rubber unibody design eliminates costly backflow from oceans, rivers and interceptors. The valve’s unique elastomer fabric-reinforced design provides a proven record of maintenance-free performance, cost savings and results that no other inline check valve can match.

Turbine agitator line with advanced impeller designs

An extensive line of Chemineer turbine agitators with advanced impeller design options, and Kenics static mixers provide beneficial solutions for effective water treatment. Chemineer has over 50 years experience in the design and manufacture of fluid agitation equipment and is a recognized leader in advanced mixing solutions for the municipal and industrial water treatment industries.

Monitoring for sanitary sewer flow and rainfall

Gwinnett County, part of regional Atlanta, has selected FlowWorks, Inc. to manage all sanitary sewer flow and rainfall monitoring data for the Department of Water Resources on annual contract. The selection was made, in part, because of FlowWorks’ proven ability to accept data directly from Teledyne Isco and ADS flow meters.

Subscribe to our free magazine

Get Our Magazine

Paper or Digital delivered monthly to you

Subscribe or Renew Learn more