Canadian Underground Infrastructure Logo

Riverside community uses fusible PVC pipe for stormwater outfall

At Keswick on the River, a community in southwest Edmonton, a new 100-year flood protection system conveys the stormwater through an underground trenchless system using Fusible Brute PVC pipe from IPEX.
At Keswick on the River, a community in southwest Edmonton, a new 100-year flood protection system conveys the stormwater through an underground trenchless system using Fusible Brute PVC pipe from IPEX.

Company info

3 Place du Commerce, Suite 101
L'Île-Des-Soeurs, QC
CA, H3E 1H7

Website:
ipexna.com

Read more

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.

As with much of Edmonton’s storm systems that collects surface water into underground pipes and conveys it to either surface watercourse, lakes, ravines or the river, the development of Keswick required a system to drain surface water and prevent flooding.

The land includes three interconnected ponds each surrounded by beautiful parkland. While the wetlands were designed with ecologist and biologists to recreate the natural system of a river valley, they will also be functional. The ponds will collect and clean rain water and return it to the river through an innovative storm outfall system. Designed for 100-year flood protection, the system conveys the stormwater through an underground trenchless system along the southern edge of the golf course and into the North Saskatchewan River. This required more than 500 metres of careful horizontal directional drilling (HDD) that dropped 32 metres to the river bank and a pipe large enough and reliable enough to handle the volume with the inherent flexibility to accommodate a compound bend during the pull. Thankfully, Fusible Brute PVC pipe from IPEX was up to the task.

Delivering a larger, better alternative

To handle maximum stormwater flow, the underground pipe installed at Keswick had to be 750 millimetres (30 inches) in diameter. Many municipalities have historically used traditional HDPE (high-density polyethylene) pipe in these trenchless applications, but PVC is the material of choice for the city of Edmonton due to its pull force and other advantages.

The other alternative was to use steel pipe, which is difficult to handle and can corrode over time, so they would have had to make do with HDPE.

Offering several benefits over HDPE and steel, PVC has grown steadily in popularity as the material of choice for stormwater systems throughout North America.

CIOD (cast-iron outside diameter) Fusible Brute PVC pipe from IPEX enables fully restrained joints with a tensile strength equal to that of the pipe. By combining the mechanical properties of PVC with an innovative patented butt fusion process, Fusible PVC pipe is capable of being installed in long continuous trenchless applications like the Keswick storm outfall system. PVC’s reduced wall thickness also requires less material and yields better flow than the alternatives.

“With steel pipe, there can be no curves along the centre line of the pipe. It’s also much heavier and it can rust over time. Because this system was going into the river, we needed an environmentally-friendly option – the pipe had to be corrosion resistant to avoid causing any contamination of the water,” explains Jordan Rice, project manager for Raywalt Construction Co. Ltd., the general contractor for the project. “We knew that we wanted to use PVC and the Fusible Brute product from IPEX, but it was not available in the larger 30-inch diameter that the system required.”

Raywalt needed 512 metres of the large diameter CIOD Fusible Brute PVC pipe (DR25). Because the system was gravity fed, dropping 32 metres over its length to the river bank, no specific pressure rating was required. The Fusible Brute PVC pipe also meets CSA B137.3, AWWA C900, AWWA C905, NSF-61, NQ 3660-950 and ASTM cell classification 12354.

“Fusible Brute is solid stuff to work with. It’s rigid enough to not flex while handling, but great for boring due to its higher pull strength.” ROGER ZWAAN, FUSION TECHNICIAN; CLEAN HARBORS DIRECTIONAL BORING SERVICES

Clean Harbors Directional Boring Services Ltd. was subcontracted by Raywalt Construction for the fusion and installation of the Fusible Brute system at Keswick.

Fusion time with Fusible Brute PVC is comparable to other thermoplastic materials. Fusion also can be performed under any temperature, as long as the pipe ends are maintained at a temperature above 4 degrees C and both the pipe ends and fusion machinery are sheltered from the elements. Temperature was not a concern for the Keswick project, which began in the warmer weather of June 2013.

“I ended up fusing about 40 joints for this project, completing about five joints a day. The warmer weather meant more cooling time for the joints, but it was a lot easier than needing to bring in shelter and heat,” said Roger Zwaan, the fusion technician with Clean Harbors Directional Boring Services.

“Because the directional boring process was taking place later, I did about 300 metres in June and then came back and finished up the remaining joints about a week before the pull date in September.”

According to Zwaan, the fusion process for the Fusible Brute pipe does require more technical expertise and focus, but when it comes to the alternative HDPE or steel pipe, there is no comparison. “If you have the right tools and the right mindset, Fusible Brute is solid stuff to work with. It’s rigid enough to not flex while handling, but great for boring due to its higher pull strength.

The alternatives are not as corrosion resistant, and steel pipe is old school – the installation and trucking costs would greatly increase,” he said.

Due to the need to drop 32 vertical metres to the outfall at the river bank and to ensure limited disturbance to the adjacent golf course, the Keswick stormwater system was specified a trenchless application using HDD methods. HDD offers several key benefits, including faster installation, ability to place pipe under natural and man-made obstacles and a greener more environmentally-friendly approach. Because HDD eliminates the need to excavate a trench, repair costs to the surrounding natural environment surrounding installation were limited.

The vertical drop, river bank, soil and larger pipe diameter proved to be a challenge for Clean Harbors Directional Boring. Fortunately, the full-strength butt fusion joints of the Fusible Brute PVC pipe offered Clean Harbor crews a greater pull force rating than they would have had with HDPE. A greater pull force offers safer installation in tough conditions for HDD trenchless applications.

“We had to bring out our biggest drill and consolidate crews to make sure we have enough people to operate the equipment,” said Matt Porter, operations area manager with Clean Harbors.

“It took a bit longer than anticipated because we encountered some harder soil conditions like coal that were not indicated on the original survey report,” said Porter.

“The higher pull strength of the Fusible Brute pipe certainly came in handy. We were able to fully use our equipment’s pulling ability and pull the pipe harder without risk of pulling apart joints or damaging the pipe.”

Unlike typical HDD installations that form an arc underground from surface to surface, the vertical drop to the river bank also required a unique approach. “We had to build a berm on the river bank to create a flat area for our equipment and then drill upwards towards the surface,” said Porter. “This was a unique installation and presented the challenge of the drilling fluids flowing back towards the machinery, which can build up.”

First project in Canada

The new stormwater system at Keswick on the River was the first project in Canada to use the largest ever Fusible Brute PVC pipe from IPEX. Through IPEX engineering expertise, training and technical support, the system is now installed and ready to protect the community from the heaviest rainfall possible. 

Because of the need to drop 32 vertical metres, HDD was required.

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.

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