Title
Resolution to Approve an Agreement with the Washtenaw County Water Resources Commissioner to Evaluate and Identify Opportunities for Stormwater Improvements in the Churchill Downs & Lansdowne Areas of the Malletts Creek Drainage District (Total Cost: $200,000.00)
Memorandum
Attached for your approval is a resolution to enter into an agreement with the Washtenaw County Water Resources Commissioner (WCWRC) to undertake a project to evaluate and identify opportunities for conveyance and stormwater improvements in a portion of the Malletts Creek Drainage District, specifically the Churchill Downs and Lansdowne sub-creekshed drainage areas bounded by Ann Arbor-Saline Road, I-94 and Scio Church Road.
This proposed resolution is in answer to a previous Council Resolution R-12-373 on August 9, 2012 that directed staff to "Negotiate Agreement with the Washtenaw County Water Resources Commissioner to Evaluate and Identify Opportunities for Stormwater Improvements in the Churchill Downs & Lansdowne Areas of the Malletts Creek Drainage District."
Much of Malletts Creek is contained in underground piping that carries stormwater runoff from the urbanized areas of Ann Arbor. Nearly 37% of the land draining to the creek is impervious, and as a result, stormwater frequently enters the creek too quickly, causing localized flooding during rain events. These rain events also carry pollutants from impervious areas to the creek, lowering water quality. Malletts Creek falls within the area of the Huron River watershed that has a Total Maximum Daily Load (TMDL) requirement for phosphorus and E. coli from stormwater set by the Michigan Department of Environmental Quality (MDEQ). In addition, Malletts Creek has a creek-specific TMDL for Biota, which is attributed to unstable flow regimes, reduced bank stability, bank erosion, sedimentation and reduced stream quality due to excessive runoff/washout throughout the highly urbanized watershed.
The Malletts Creek Restoration Pro...
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