Bristol & Mavelle Park/Lynmar Basin Stormwater Project

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The Lynmar Basin is a low-lying, open space that currently briefly detains stormwater before it makes its way to Lake Edina and eventually Nine Mile Creek through storm sewer pipes. The location was identified as an opportunity to better manage stormwater as part of a larger effort to improve downstream water resources.

The retrofit project will better utilize the space to capture and clean more stormwater than it already does today. The existing dry pond area will be expanded and deepened to promote stormwater infiltration. The infiltration basin will be planted with native trees, shrubs, and forbs.

The project benefits include;

  • Less polluted water entering Lake Edina and downstream water resources
  • Reduced flooding in the South Cornelia neighborhood
  • Enhanced natural resources, including improving pollinator habitat
  • A portion of the space kept open for passive recreation, and a new walking path

This project is done in partnership with the Nine Mile Creek Watershed District.

The Lynmar Basin is a low-lying, open space that currently briefly detains stormwater before it makes its way to Lake Edina and eventually Nine Mile Creek through storm sewer pipes. The location was identified as an opportunity to better manage stormwater as part of a larger effort to improve downstream water resources.

The retrofit project will better utilize the space to capture and clean more stormwater than it already does today. The existing dry pond area will be expanded and deepened to promote stormwater infiltration. The infiltration basin will be planted with native trees, shrubs, and forbs.

The project benefits include;

  • Less polluted water entering Lake Edina and downstream water resources
  • Reduced flooding in the South Cornelia neighborhood
  • Enhanced natural resources, including improving pollinator habitat
  • A portion of the space kept open for passive recreation, and a new walking path

This project is done in partnership with the Nine Mile Creek Watershed District.

  • Construction Update - November 23

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    The site has been closed up and cleaned up for the year. Crews will be back in spring to do restoration and planting. The limestone outcroppings and stepping stones installations have been delayed to spring.

  • Construction Update - November 9

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    Crews are working this week to get concrete poured before the weather turns.

  • Construction Update - October 27

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    Construction of the sand trenches is complete. Crews are transitioning to the storm pipe work in the street at Lynmar Lane.

    In the first part of November Lynmar Lane will be restored and a concrete sidewalk will be installed. You'll also see the limestone stepping stones and outcroppings at the basin going in.

  • Construction Update - October 5

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    The majority of excavation is complete. Crews are now working on installing the sand trenches at the bottom of the basin for stormwater infiltration.

  • Construction Update - September 22

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    This week

    Tree clearing will be completed. Trees in the basin were removed to accommodate lowering the basin and installing a sand trench for infiltrating stormwater. Ash trees along Mavelle Drive were removed as part of the City's plan to slow the spread of Emerald Ash Borer.

    Next week

    Earthwork and initial soil disturbance begins.

  • Construction Schedule Update - Mobilizing Next Week

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    The construction crew will begin mobilizing early next week - expect to see equipment and people on site as early as Monday.

    They also plan to begin work next week. The first step is tree removal in the basin.

  • Construction Schedule Update

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    The contractor is eager to get started and plans to mobilize and begin work in September.

  • Construction Schedule

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    Grading and storm sewer work is expected to start in October and continue for approximately 2 months

    Seeding and planting will occur in spring 2023

  • Contractor Selected

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    Eight responses to the request for bid were received with several coming in below what Engineers estimated.

    The Nine Mile Creek Watershed District Board has awarded the contract to U.S. SiteWork.

    August 17, 2022 Nine Mile Creek Watershed District Board Meeting Agenda

    Next steps include getting more detailed information on the construction schedule.

  • Out for Bid

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    The project is officially out for bid. We'll describe the outcome of the competitive bid process here later in August.

Page last updated: 23 Nov 2022, 08:26 PM