Rimrock Road Pond Retrofit for Improved Water Quality

Last Updated: 12/21/2018

Rimrock Road Pond Retrofit for Improved Water Quality

The City of Madison is planning to enhance the stormwater management system that treats a 136 acre watershed that is located on the east side of Rimrock Road between E Badger Road and Moorland Road. Eventually this water flows into Lake Monona.

The City proposes to update the stormwater system from what looks like a ditch with a concrete bottom, to a pond that permanently holds water. By creating a pond that permanently holds water, the system will be able to remove more sediment and nutrients from the stormwater before it reaches Lake Monona.

Based on the preliminary design, the project will result in annual reductions of the following to Lake Monona:

  • 12,800 lb of particulate solids
  • 29 lb of phosphorus
  • 15,000 lb of algae
Rimrock Road Pond Project Area and Watershed
Rimrock Road Pond Retrofit Location & Watershed Area



Public Input Meeting

A public input meeting will be held at the Badger Rock Neighborhood Center (501 E. Badger Road) on January 16, 2019 from 6:30 p.m. - 8:00 p.m. The presentation will be posted following the meeting.


Proposed Schedule:

Preliminary Design - 2018

Gather Public Input - Winter 2018/2019

Design - Spring 2019

Build - Late Summer/Late Fall 2019