Edina

ABOUT

The Edina Streambank Stabilization Project focuses on stabilizing the streambanks of Nine Mile Creek through the City of Edina. The project will work on approximately 3.5 miles of the 5.7 miles of Nine Mile Creek as it flows through the City of Edina. The project will result in improved stream health, stabilized stream banks, improved habitat, and the protection of property from erosion.

Project Details

Before and during restoration on Reach 1
Before and during restoration on Reach 1

The District will use streambank restoration techniques including realigning the creek channel, native plantings, rock vanes, along with other methods. The 3.5 mile project is divided into 15 different reaches (sections) and two phases.

Phase 1

  • Totals about 2.2 miles of creek
  • Includes stream reaches 1-11
  • From Lincoln Drive and Londonderry Road in Edina to 5400 of 70th Street West in Edina
  • A contract for Phase 1 work was awarded in June 2017
  • Work started August 2017

Phase 2

  • Totals about 1.3 miles of creek
  • Includes stream reaches 12-15
  • From the 5300 block of 70th Street West in Edina to the HWY 100 Edina Industrial Boulevard interchange in Edina
  • Work is slated to begin in 2018-2019

View: Edina Streambank Restoration Reaches (PDF)

Project Updates

Restoration construction on Reach 1
Restoration on Reach 1

Phase 1 (Reaches 1-11)

The initial stream bank restoration/stabilization work in reaches 1 and 3-10, of Phase 1 has been completed. We are in the process of completing the revegetation plans and ordering the needed materials.  Crews will be out over the next month implementing the revegetation portion of the project.  This includes some re-seeding in areas and the planting of shrubs, trees and native plants in areas that were cleared for access and areas that were regraded to address erosion.

In reaches 2 and 11, new stream channels were dug last fall and allowed to sit through this spring.  Beginning soon after June 15, 2018, crews will re-route the flow from the old channels to the new channels, and will backfill, stabilize and revegetate the old channels. Work will be completed by June 30, 2018.  The MDNR does not allow work in public waters (which includes Nine Mile Creek) until after June 15th to protect fish migration and spawning. The revegetation will take place in these reaches after the remaining work is completed by June 30th.

Phase 2 (Reaches 12-15)

Projected Timeline

  • Post an RFP (Request for Proposals) soliciting contractors to undertake phase 2 of the Edina streambank restoration/stabilization project – June 2018
  • Survey and staking of construction limits – July 2018
  • For restoration work to occur, crews must clear access areas to the creek – August 2018
    • Invasive buckthorn and trees susceptible to disease and/or less desirable trees were selected for removal (with the help of the City of Edina forester) to clear access on public land areas, while trying to preserve more desirable trees (like oaks).
    • For any tree removal on private property, the landowner(s) will be alerted and involved in the discussion.
  • Beginning of restoration and stabilization work on reaches 12-15 – August -December 2018
  • Completing any remaining revegetation needs – spring to early- summer 2019

 

Streambank Restoration Technique: Rock VaneStreambank Restoration Technique: Rock Vane
The Edina Nine Mile Creek Streambank Stabilization Project will use rock vanes, a restoration technique shown here. Rock vanes help prevent streambank erosion by redirecting flow toward the center of the creek.

Learn More:

Streambank Restoration Techniques (PDF)

Historical Nine Mile Creek Stream Channels Edina Reach 1 to 15 (PDF)

Water Quality Impact

The project will reduce streambank erosion resulting in reduced sediment and phosphorus in Nine Mile Creek. It will also improve habitat for fish and other aquatic life.

Restoring Nine Mile Creek

With the completion of phases 1 and 2 of the Nine Mile Creek Stabilization and Habitat Restoration Project in Edina, and a previously completed phase in Hopkins in 2010-2011, stabilization and restoration techniques will have been completed along more than 4.5 miles of the creek.  The projects incorporated both hard structure engineering such as rip-rap, and bio-engineering techniques that include root wads and biologs for stream bank protection. Other techniques included vegetated reinforced soil stabilization (VRSS) for stream bank stabilization, boulder rock vanes for grade control and in-stream flow control, and constructed riffles and pools for in-stream habitat.  These projects have resulted in reduced nutrient and sediment loads, improved stream health, stabilized stream banks, improved habitat, and the protection of property from erosion.

Questions?

Contact Randy Anhorn, District Administrator, at 952-835-2078.