Last Updated: 06/09/2020

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.

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

Timeline

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

The first public information meeting for this watershed is scheduled for Oct.23, 2019. The meeting is scheduled from 6:30-8:30 p.m., at the Elver Park Neighborhood Center, 1201 McKenna Blvd., Madison, WI 53719.
Oct. 23 Presentation 

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

• City of Madison Flood Website
• Engineering Waterways Newsletter PDF 
• Flood Prevention Flyer and website
• LISTEN: Everyday Engineering Podcast Episode: Basement Drainage
• LISTEN: Everyday Engineering Podcast Episode: Historic Flooding
• LISTEN: Everyday Engineering Podcast Episode: What's going on with the Watershed?