Three Lakes Estates Detention Pond Improvements

May 2018

The Easter Lake Water Quality Management Plan was completed in 2012 in partnership with the Iowa Department of Natural Resources and Polk County. Currently Polk County is working to complete the dredging of Easter Lake. In order to improve long term water quality in Easter Lake, it is necessary to reduce as much sediment entering Easter Lake as possible. One part of this mitigation effort is to ensure the detention ponds, such as those shown on the map below are able to retain as much silt as possible. During construction of homes in this area, a significant amount of silt was deposited in these ponds. Therefore a conceptual plan is being developed to improve the stormwater management function of these ponds which will likely include dredging to remove silt from some or all of the ponds.

Water in the ponds was lowered fall 2017 and has been surveyed. The conceptual study continued through last winter and we are now asking for public input from the residents living in the area of these stormwater detention ponds. Residents of the surrounding area are invited to a meeting to learn more details about the project and schedule. The City of Des Moines will be taking individual property owner feedback around table displays following the general project information at the beginning of the meeting. The meeting will be held:

  • Wednesday, May 16, 2018
  • 6:00 PM
  • South Side Library
  • 1111 Porter Ave, Des Moines, IA

 

Public Informational Meeting letter and map 05-16-18_Page_2

December 2017

Currently, partners of the Easter Lake Watershed Project are working on completing dredging, shoreline, and habitat work in Easter Lake. In order to improve long term water quality in Easter Lake, it is necessary to reduce as much sediment entering the lake as possible. One part of this effort includes making sure the detention ponds such as those in the Three Lake Estates area and Easter Lake Drive west of SE 27th Court are able to retain as much silt as possible. During construction of homes in this area, a significant amount of silt was deposited in these ponds. At this point in time, a conceptual plan is being developed to improve the stormwater management function of these ponds which will likely include dredging to remove silt from some or all of the ponds.

Current Project Status

Detention Ponds in this area have been surveyed and water is being lowered prior to winter. Lowering the water in these ponds serves multiple purposes including:

  • Allows for more accurate silt measurements to be estimated for the development of construction plans
  • Allows for silt on the bottom of the pond to consolidate
  • Helps to dry out the anaerobic silts which will help to control some of the natural odors when these silts are removed through a future construction contract
  • Reduces the amount of silt that is deposited into Easter Lake before the ponds are dredged

The conceptual phase study will continue through this spring and will result in specific recommendations to improve the function of the stormwater detention ponds.

As more details become available, a meeting will be held to help you learn more details about the project and schedule and will provide an opportunity for feedback.

For questions or concerns regarding this project, please contact Bruce Rydberg, P.E. at bkrydberg@dmgov.org.

Location Maps

Please click on the images below to see detention ponds involved in this project. All numbered ponds will be drained December 2017.

 

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