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Executive Residence 2022 - prior to restoration

Clean Lakes Alliance is proud to partner with the Wisconsin Executive Residence Foundation, along with other local organizations, to fund and implement a lakeshore restoration along 294 feet of Lake Mendota shoreline. Located at the iconic Executive Residence, the project will replace 7,184 square feet of existing turf with 32 species of native plants, wildflowers, grasses, and shrubs. In all, a total of 3,177 native plants will be added to the shoreline area!

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Aquatic plant transport barge on Lake Mendota

By Pete Jopke, Water Resources Planner with the Dane County Land & Water Resources Department
Article first published in the 2022 Greater Madison Lake Guide, a Clean Lakes Alliance publication

Aquatic plant harvesting on the Yahara lakes

The Dane County Land & Water Resources Department manages an aquatic plant harvesting program with much of the harvesting occurring on lakes Mendota, Monona, Waubesa, and Kegonsa. Occasionally, other smaller waterbodies are harvested to aid in recreation and invasive plant management. The program dates to the early 1980’s when five harvesters were in operation. In those years, harvests totaled over 300 tons of plant material. In 2021, the existing fleet of 12 harvesters recorded plant harvests of more than 12,000 tons!

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Lake Mendota frozen 7Jan2022

It’s official – Lake Mendota freezes over!

Temperatures below the freezing mark, combined with cold water, helped Lake Mendota officially freeze in the early morning hours on Friday, January 7, 2022. The official declaration comes from the Wisconsin State Climatology Office. Lake Mendota, the largest lake in the Yahara Watershed, froze 23 days shy of January 30th. The latest ice-on date ever declared was on January 30th, 1932.

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Lake Mendota looking toward Picnic Point

Ice-on date arrives days after the new year

Air temperatures below the freezing mark throughout the last week, combined with cold water helped Lake Mendota officially freeze on Sunday, January 3rd, 2021, as declared by the Wisconsin State Climatology Office. Lake Mendota, the largest lake in the Yahara Watershed, froze 27 days shy of January 30th – which is the latest date that ice-on has ever been declared (1/30/1932).

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2019 Clean Lakes Community Breakfast Speakers

The Mayor, The Executive, and The Secretary

Clean Lakes Alliance is pleased to announce a trifecta of speakers joining us for our Community Breakfast on Wednesday, May 8th at the Alliant Energy Center Exhibition Hall. We’ll hear from City of Madison Mayor Satya Rhodes-Conway, Dane County Executive Joe Parisi, and Wisconsin DNR Secretary Preston Cole about their plans for the Yahara Watershed.

At the breakfast, we’ll renew our public partnerships with the city, county, and state to align our efforts for the Yahara CLEAN Compact and to improve water quality. Join us for the beginning of a NEW united approach to lake health.

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Lake Mendota Frozen Dec 2018

It’s Official – ICE ON for Lake Mendota!

Ice on date beats median freeze date by five days

Despite warm weather in Madison over the weekend, cool nights, light winds, and cold water helped Lake Mendota officially freeze on Saturday, December 15th. Lake Mendota, the largest lake in the Yahara Watershed, froze eight days after the smallest lake in the watershed, Lake Wingra, which officially froze on December 7th. Lake Monona officially froze on December 11th.

The Wisconsin State Climatology Office requires ice to hold for a period of 24 hours before a lake can officially be declared frozen over. After ice took shape this weekend, staff waited to see whether it would hold out through the warm daytime temperatures. The December 15th freeze date is 12 days ahead of last year’s December 27th freeze date, and a surprising five days ahead of the December 20th median freeze date. The latest freeze date for Lake Mendota was January 30th – which happened in the winter of 1932.

The Wisconsin State Climatology Office makes the official determination as to whether the lake is frozen. The climatologists use the same guidelines they have used for decades to determine whether the lakes are iced over. This allows for a continuity in data collection. Read more: Determining ice cover on Madison’s lakes.

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