Title
Resolution to Petition the Washtenaw County Water Resources Commissioner to Design and Construct Stormwater Management Control Measures on Miller Avenue in the Allen Creek Drainage District to Reduce Downstream Flooding and Improve Water Quality (Total Project Cost: $6,505,000.00; Stormwater Portion: $300,000.00)
Memorandum
Attached for your approval is a resolution to petition the Washtenaw County Water Resources Commissioner (WCWRC) to undertake a project to design and construct stormwater management control measures on Miller Avenue, between North Maple Road and Newport Road.
The proposed Miller Avenue Improvements project will reconstruct the existing corridor using a traditional road surface, with management of storm flow in rain gardens and infiltration basins within the right-of-way.
These stormwater management improvements will reduce the amount of stormwater entering the City's stormwater piping network and reduce contaminant loading to the downstream creeks and the Huron River. The City is subject to a Total Maximum Daily Load (TMDL) restriction by the State of Michigan for biota (total suspended solids), E. coli and phosphorus. The proposed improvements will improve water quality and reduce localized flooding in the project areas and downstream.
Nearly 36% of the land draining to the Huron River and its tributaries is impervious, and as a result, stormwater frequently enters the river too quickly, causing localized and regional flooding during certain rain events. These rain events also carry pollutants from impervious areas to the creeks, lowering water quality. The City falls within the Total Maximum Daily Load (TMDL) area of the Huron River for phosphorus and E. coli from storm water.
Since the project focus is on water quality improvement, it is eligible for low-interest State Revolving Fund (SRF) loan funding, and this project has been included on the Project Priority List (PPL) for SRF loan funding. This project has been class...
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