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Lake Maintenance
Lake Weed Harvesting and Processing
City staff harvest lake weeds during the months of July and August. Residents will see 3 large orange weed harvesters out on the lake during the summer months. Lake weeds are picked up and composted by the City. Compost is available to all residents at the Eco Centre.
Thank you to all lakefront owners who take the time and immense effort to collect weeds along their lakeshore property!
- For more information about Lake Weed Wednesday cart collection visit chestermere.ca/recycle.
Lake Water is used for Irrigation
The lake is still actively used as a reservoir for irrigation canals that run along the north and south ends of the lake. As such, the Western Irrigation District (WID) is able to control the water levels.
Lake Lowering & Rising
The lake water is raised in the early spring (usually mid to late April) and is lowered shortly after the Thanksgiving holiday. If you have any questions about the lake water levels, please visit the Western Irrigation District (WID) website.
Water Quality Testing
City staff take samples of the lake water each week and send them for testing to Alberta Health Services. Testing is done at the Cove Beach, Sunset Park, John Peake Park and multiple samples are taken at Anniversary Park (due to its popularity). If water quality concerns are found, the City will notify the public.
For more information, visit the Alberta Health Services website.
- Why do we have so many lake weeds?
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Water temperature, depth, water quality and lake usage all play a part in weed quantity.
The lake weeds multiply when they break up, float around, and then establish new colonies. A new plant can start from a tiny piece of an existing one.
The most common form of weed in Chestermere Lake is the Northern Milfoil.
Last Updated: June 8, 2022
- What are the harvesters for?
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The City operates three aquatic weed harvesters and a barge. They operate from July 1 – Aug 31 each year. Depending on weed growth, harvesters may begin cutting earlier or cut later into September. The harvesters cut and remove lake weeds and other debris to ensure that Chestermere Lake remains safe for recreational and boating activities. Harvesting also reduces the clogging of the Western Irrigation District (WID) irrigation system.
Last Updated: June 8, 2022
- How many kilograms of lake weeds are removed by the harvesters?
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A breakdown of weed harvesting volumes from 2018 to 2021 is below:
2018
- 215.5 trailer loads
- 342,645 kg
2019
- 238 trailer loads
- 378,420 kg
2020
- 202.25 trailer loads
- 321,577.5 kg
2021
- 244.25 trailer loads
- 388,357.5 kg
On average, seasonal staff spend about 2,040 hours in total on the harvesting program. This results in regularly removing over 200 trailer loads of lake weeds, ultimately being converted into compost material.
Last Update: June 8, 2022
- Is there a schedule the harvester operators follow?
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The harvester operators follow a set schedule based on the historical prevalence and location of weeds. Although they typically adhere to a regular “route”, picking up where they left off the day before, this route may vary depending on operator discretion. They also focus on floating weed masses and known areas with high weed populations.
The harvester machine can only cut weeds down to a depth of 2m. This means that the weeds still grow on the lake bottom. As such, this program keeps weed growth in check during the season but does not prevent them from growing.
Last Updated: June 8, 2022
- How do lakefront home owners collect lake weeds?
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Every summer, the lakefront owners help out by collecting floating weeds and hand harvesting weeds on and around their shoreline.
This task involves putting the weeds into lake weed carts that are picked up by the City's Environmental Services team for a 12-week period in the summer months.
This collaboration ensures that Chestermere Lake continues to be a key recreational amenity for everyone to enjoy.
Last Updated: June 8, 2022
- Where do the weeds go after they are harvested from the lake?
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The lake weeds are hauled by truck to the City’s Eco Centre.
About the Compost: the lake weeds are deposited, screened of debris, turned regularly for several months, and mixed with other soil to create good compost material. The process takes place for approximately one year. The larger clumps are screened out and the remaining compost is made available to residents.
Picking Up Compost: Residents must bring their own shovels and bins: these are not provided at the depot. Staff are not available to help load material. Please take only what you need - you cannot take a full truckload.
Last Updated: June 8, 2022