Greentree/McKenna Watershed Study

Last Updated: 09/11/2020

Update - 9/2/2020

Public Information Meeting #2 Scheduled. See Details Below.

Project Overview

The City of Madison will complete a watershed study in the Greentree/McKenna watershed (as shown below). The watershed study will identify causes of existing flooding and then look at potential solutions to try to reduce flooding. The study will use computer models to assist with the evaluations. A local engineering consultant, MSA Professional Services, will complete the study.

For more information, please see the Flash Flooding Story Map*Note: Please view the story map using Firefox or Google Chrome browsers. Story maps are not viewable with Internet Explorer.

Greentree/McKenna Watershed Map

The Greentree/McKenna watershed drains to the south toward the Upper Badger Mill Creek ponds near Prairie Ridge Park.


The study is beginning Fall 2019 and is expected to take over 18 months. During this time, the city will look at watersheds as a whole to make sure solving a flooding problem upstream won’t push more water downstream and cause more flooding.

Public Information Meetings

Public Information Meeting #2
The second Public Information Meeting (PIM) for this watershed is scheduled for Thursday, October 1, 2020, 2020 from 6:00 pm - 8:00 pm via Zoom.

Register in advance for this webinar:
After registering, you will receive a confirmation email containing information about joining the webinar.

The presentation will be found here when it is available.

Public Information Meeting #1

The first public information meeting for this watershed was held on Oct.23, 2019 from 6:30-8:30 p.m., at the Elver Park Neighborhood Center, 1201 McKenna Blvd., Madison, WI 53719.
The presentation can be found here: Oct. 23 Presentation

Focus Groups

The City of Madison Engineering Division set locations, times, and dates for focus group meetings for the Greentree/McKenna Watershed. The meetings were requested by community members, and were open to the public, but the conversation was tailored to gathering more information on flooding issues in the meeting area. The focus groups looked further into the issues that caused flooding in the last few years specific to each meeting area. The Engineering Division worked with alders, and residents to find a date, location and time that worked for the specific areas.
Greentree/McKenna Focus Groups Areas

The meetings lasted approximately one hour, and most meetings were held outside, rain or shine, in a walk-and-talk format.

The following focus group meetings were held for this watershed:

  • Gammon - Schroeder - Thursday 7/30/20 4:00-5:00 PM - West side of Gammon Rd. at Schroeder Rd.
  • Laurie Drive -  Thursday 7/23/20 9:00-10:00 AM - SW corner of Laurie Dr. and Schroeder Rd.
  • Park Edge Drive - Tuesday 7/28/20 9:00-10:00 AM - Park Edge Dr. at Georgetown Ct.
  • Park Edge Drive - Thursday 7/30/20 6:30-7:30 PM - Park Edge Dr. at Georgetown Ct.
  • Park Ridge Drive -  Tuesday 7/28/20 11:00 AM-12:00 PM - Park Ridge Dr. near The Lexington Condominiums
  • Park Ridge Drive - Wednesday 7/29/20 6:30-7:30 PM - Park Ridge Dr. near The Lexington Condominiums
  • Piping Rock Road - Wednesday 7/29/20 4:00-5:00 PM - SW corner of Piping Rock Rd. and Winston Dr.
  • Saalsaa Road - Wednesday 7/29/20 2:00-3:00 PM - NW corner of Saalsaa Rd. and Hammersley Rd.
  • Struck Street -  Thursday 7/23/20 11:00 AM-12:00 PM Struck St. - Next to the John Powless Tennis Center

Watershed Study Information

To learn more about flash flooding and why the City is completing a watershed study in this area please visit: Flash Flooding Resilience Story Map*Note: Please view the story map using Firefox or Google Chrome browsers. Story maps are not viewable with Internet Explorer.

Listen to a presentation about the City's watershed studies at: Watershed Studies 2019 Audio Presentation.

Report Flooding

If anyone has experienced flooding, and is willing to share with the City, please report it on the City's website. Even if a homeowner reported flooding to 2-1-1, FEMA, or a City official, the City needs standardized information to create stormwater models that show existing flooding conditions. The flood data helps the City prioritize different flood projects and future watershed studies.

Additional Information