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Lauderdale Flood Mitigation Project

The Lauderdale Flood Mitigation Project has been initiated to reduce the risk of flooding in the Lauderdale and area neighbourhoods. The project is currently in the preliminary design phase.

As part of the project, EPCOR will be constructing a dry pond in the Grand Trunk Off-Leash Dog Park and installing/upgrading various storm infrastructure throughout the Lauderdale neighbourhood.

Dry ponds are stormwater management facilities, which are designed to temporarily hold stormwater when the drainage system cannot handle the water volumes due to severe storm events. Severe storm events such as thunderstorms are challenging to predict because they can come with little warning. They can be very intense for a short period of time in a localized area causing flooding of roads, properties and sewer backup in basements. 

During severe storm events, the ponds act as storage facilities and help protect local homes and businesses. The water will then drain from the dry ponds into the downstream drainage system when there is capacity.

This project is part of EPCOR’s Stormwater Integrated Resource Plan (SIRP) which aims to reduce the risk of flooding in Edmonton neighbourhoods and is funded in part by the Government of Canada’s Disaster Mitigation and Adaptation Fund (DMAF). ​

Find more information below or download the project noti​c​e​.​​​​

 

Impacts to you

During dry pond construction, we expect to keep a reduced area of the dog park open for use, along with the parking lot, with safety measures in place for park users.

community impact

 

Community engagement

EPCOR will be asking for feedback on enhancements to the dog park that will be intended to not only meet the diverse needs of small and big dogs, but also add amenities for dog owners.

Community engagement

 

Project timeline

Construction of the dry pond and storm infrastructure upgrades work is anticipated to start in 2023, after public engagement​ has been completed and final designs have been approved.

 

What's happening

To support the design of the dry pond, a geotechnical investigation is required to determine the soil types that are p​​​resent below the ground surface.
What's happening​​​​

 

FAQ's about the project

We have answers to some frequently asked questions about our flood mitigation project.
Frequently a​sked questions​​​​​​​

Content here

​Community impact

During dry pond construction, we expect to keep a reduced area of the dog park open for use, along with the parking lot, with safety measures in place for park users. 

The specific footprint and size of the dry pond within the dog park has not yet been determined; however, the facility needs to be designed to accommodate the future LRT alignment, the dog park access road and parking lot. 

The size of the area able to remain open during dry pond construction will be based on the technical design requirements and community/dog park user feedback.

Once construction has been completed and landscaping established, the dry pond area will return to its existing size and use as part of the fenced Grand Trunk Off-Leash Dog Park - with enhanced amenities.

Construction of the dry pond and storm infrastructure upgrades work is anticipated to start in 2023, after public engagement has been completed and final designs have been approved.

Community engagement

We recognize the importance of the Grand Trunk Off-Leash Dog Park to the Lauderdale community and dog park users, as the off-leash dog park allows owners and their dogs to spend time together and allows dogs a space for play and socialization.

EPCOR is committed to working with the community and dog park users to develop an engagement approach that provides project transparency, a process to manage any questions or issues, and provides meaningful communication to residents.

Throughout the design stages of the project, EPCOR will be asking for feedback on enhancements to the dog park that will be intended to not only meet the diverse needs of small and big dogs, but also add amenities for dog owners.

We will be distributing surveys and hosting public information sessions at various stages of the project to provide an opportunity for residents to gain more information about the project, ask questions, identify concerns and issues and provide feedback on identified design elements of the project. 

It is EPCOR’s responsibility to build the dry pond and maintain the underground drainage infrastructure. However, the ownership and maintenance of the dry pond surface, vegetation and amenities is a City of Edmonton responsibility. 

What we have heard so far

On Saturday, July 2​3 and Sunday, July 24, 2022, EPCOR hosted two public information sessions for the Lauderdale Flood Mitigation Project at the Grand Trunk Off-Leash Dog Park to provide an opportunity for residents and dog park users to gain more information about the project, ask questions, identify concerns and issues and provide feedback on identified design elements of the project.

Over the two days, EPCOR discussed the project with 100 – 120 residents. Residents provided meaningful feedback and asked thoughtful questions about the project, what dog park users can expect during construction and once the project is completed.

Two more public information sessions are being held at the Grand Trunk Off-Leash Dog Park on August 9, 2022 from 3:00 p.m. to 6:00 p.m. and August 10, 2022 from 5:00 p.m. to 8:00 p.m. to gather additional feedback.

Community and dog p​ark user feedback

The feedback heard to date includes questions, concerns and suggestions on the following project elements:

  • Accessibility
  • Safety
  • Dry pond design
  • Amenities
  • Current usage
  • Construction
  • Landscaping
  • Maintenance
  • Community flooding
  • Existing drainage issues

​What's happening

To support the design of the dry pond, a geotechnical investigation is required to determine the soil types that are present below the ground surface. This activity will involve drilling boreholes along 127 Avenue, 129 Avenue, 109 Street and within the Grand Trunk Park and the Grand Trunk Off-Leash Dog Park. 

Additionally, about 20 hydrovac excavations will be necessary to locate and identify existing underground infrastructure throughout the neighbourhood. A topographic survey will also occur throughout the project area.

Most work will be completed in public right-of-way, except for the Grand Trunk Park and the Grand Trunk Off-Leash Dog Park. Some excavation locations will be in grassy areas adjacent the sidewalks. 

All affected landscaping, pavements, sidewalks and alleyways will be restored to their original condition. Impacted grassy areas will be restored using topsoil and sod. 

The activities will involve: 

  • Excavating using a hydrovac truck 
  • Drilling boreholes using a truck-mounted drill rig
  • Temporary steel plates on roadways, where required
  • Backfilling and surface restoration of all test holes
  • Surveying

During the geotechnical investigation, residents may experience general noise from the hydrovac trucks, and equipment used for drilling, excavation, and restoration. 


The specific footprint and size of the dry pond within the dog park has not yet been determined; however, the facility needs to be designed to accommodate the future LRT alignment, the dog park access road and parking lot. During dry pond construction, we expect to keep a reduced area of the dog park open for use, along with the parking lot.

Traffic impacts

During the geotechnical borehole drilling and hydrovac excavation, some lanes will be temporarily closed. Lanes will be closed as the work progresses and will reopen once the work has been completed in the area. At least one lane of traffic will be maintained at all times. 

Some temporary sidewalk closures may be required where hydrovac locations are adjacent to sidewalks. Pedestrians will be directed safely around the work area. 

Immediate Dog Park impacts

For the locations in the dog park, the trucks and equipment will need to access the locations from within the park itself. Temporary snow fencing will be installed around the boreholes and equipment during the borehole drilling. The excavated area will be backfilled and restored with a mixture of sand and clay. The fence will be removed and the turf will be restored using the material that was removed prior to the drilling.

All crews are aware of the high use of the dog park and will take extra care and caution to ensure safety for both dogs and dog owners.​

Frequently asked questions about the project​​

Why is the project needed?

Lauderdale is serviced with a mix of combined sanitary and storm lines, and some separate storm lines. In a combined sewer, both sanitary and stormwater flow together in the same pipe. There is no stormwater management facility in the neighbourhood, and the current overland (or surface drainage system) is not sufficient. There are several areas in this neighbourhood at lower elevation where water pools, which puts the Lauderdale community at risk of flooding during intense rainfall events.​​

Why was the Grand Trunk Off-Leash Dog Park selected as the dry pond location?

There is limited green space in Lauderdale suitable for this drainage infrastructure. Due to its topographic location within the city, the Grand Trunk Off-Leash Dog Park collects stormwater from several areas within Lauderdale, as well as from areas as far west as 127 Street and as far north as 137 Avenue, during extreme rainfall events when the amount of rainfall exceeds the capacity of the local drainage systems.

Grand Trunk Park is hardly used. Did EPCOR look at alternative locations for the dry pond?

Yes, several different dry pond location options were looked at; however, there is limited green space in Lauderdale. One of the alternative options that was considered was Grand Trunk Park. This area is not feasible from a technical perspective due to the major combined sewer line that runs directly underneath the park and the fact that Grand Trunk Park is three metres higher in elevation than the Grand Trunk Off-Leash Dog Park. Grand Trunk Park collects only the stormwater that falls directly on Grand Trunk Park; there is minimal stormwater that flows into Grand Trunk Park from other areas in Lauderdale.

According to the City of Edmonton, from May 1, 2019 to September 30, 2022, Grand Trunk Park is one of the City’s most heavily used sites in the northwest quadrant of Edmonton, and perhaps the City as a whole.

Where will the dry pond be located in the dog park and how big will it be?

The project is currently in the preliminary design phase and, at this point, the design of the dry pond (exact location, size, shape, how steep/gentle the slopes are, etc.) has not yet been determined. The feedback gathered from dog park users and community residents, along with the technical requirements of the project, will help inform the final design of the dry pond.

Will the dog park be open during construction?

During dry pond construction, we expect to keep a reduced area of the dog park open for use, along with the parking lot, with safety measures in place for park users. The size of the area able to remain open during dry pond construction will be based on the technical design requirements and community/dog park user feedback.

The specific footprint and size of the dry pond within the dog park has not yet been determined; however, the facility needs to be designed to accommodate the future LRT alignment, the dog park access road and parking lot.

Are dry ponds safe?

A dry pond is built with standard safety measures. Many dry ponds in the City of Edmonton are built in school yards and include recreation facilities such as soccer fields and baseball diamonds. The sides are typically gently sloped, anywhere from five to ten feet in horizontal length for every one foot of vertical drop. 

Dry ponds are graded so stormwater pools in specific areas first. This helps keep the majority of the area dry and drains more quickly when they do become flooded. Water that does collect in a dry pond drains very quickly, often between one to three hours after a heavy rainfall. The grates for the drains are designed to consider safety of pets and small animals that use the facilities.​

Will the stormwater collected in the dry pond contain toxins or chemicals that can harm my dog?

​The first few millimeters of rainfall heavily dilutes any contaminants from the roadway or other surfaces and washes them through the underground stormwater system early in a storm event.

As the rainfall continues there are less contaminates remaining on the roadway and other surfaces so the concentration of potential contaminates in the stormwater is significantly reduced.

If the rainfall becomes intense enough, and if the drainage system gradually becomes full, the dry pond will begin to collect stormwater. The water in the dry pond will be mainly rainwater with very low concentrations of any sediments or contaminants.​

Are there any other dry ponds in off-leash parks in Edmonton?

​In the City of Edmonton, dry ponds are commonly used for recreation spaces such as soccer fields and baseball diamonds, and several are located in schoolyards. 

There are 79 dry ponds across the city; three of which are off-leash dog parks (located in the Tweddle Place, Satoo and Meyonohk neighbourhoods).

What kind of enhancements options can residents provide feedback on?

EPCOR will be looking for feedback on enhancements such as agility and water play features for dogs, formal trails, landscaping, etc. The proposed enhancements are intended to not only meet the diverse needs of small and big dogs, but also add amenities for dog owners.

We are in the very beginning stages of community engagement for this project, which will include community and dog park user surveys and public information sessions to get a better understanding of the community’s and dog park users’ priorities for enhancements to the dog park once the dry pond is built. The feedback from the community and dog park users will be used to inform the final design of the dry pond.

I have never heard that Lauderdale has had any flooding issues. Can you share the data on flooding in the neighbourhood?

​The dry pond is part of EPCOR’s Stormwater Integrated Resource Plan (SIRP) which aims to reduce the risk of flooding in Edmonton neighbourhoods. The initiative prioritizes infrastructure investments to reduce the flood risks and potential impacts. 

While local flooding data is one consideration, not all flooding events are reported to EPCOR. The SIRP initiative is based on multiple criteria, including system design, insurance industry data, environmental factors and public input.

Flood mitigation in the City of Edmonton is assessed from a city-wide perspective, factoring in future climate change risks. The goal of SIRP is to reduce the risk for property damage by having safe, managed facilities that collect large volumes of water created from severe storm events.

How long will it take to build the dry pond?

It can take anywhere from six to eight months to build a dry pond, including restoration, depending on the size.

When will construction on the dry pond start?

Construction of the dry pond and storm infrastructure upgrades work is anticipated to start in 2023, after public engagement has been completed and final designs have been approved.

What can residents and dog park users expect during dry pond construction?

Residents and users can expect to see the contractor use a combination of excavators, loaders, skid steers, and tandem trucks, as well as other equipment. Details regarding traffic accommodations, construction impacts, and timelines will be provided in future notices as we get closer to the start of construction and confirm those details with the contractor.