Title
Resolution to Petition the Washtenaw County Water Resources Commissioner for the City of Ann Arbor FY2014 Tree Planting Project in the Huron River Green Infrastructure Drainage District (Total Cost: $300,000.00; City’s Apportionment: $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 implement stormwater control measures throughout the City, through a Citywide Tree Planting Project.
These 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 proposed improvements will improve water quality and reduce localized flooding in the project areas. The trees will be planted during the fiscal year 2014 (Fall 2013 - Spring 2014). The plantings will be done both in the fall and the spring.
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 creek, 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. In addition, there are several creeks that have 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 metric used for address the TMDL is the amount of Total Suspended Solids (TSS) found within the creek habitat profile.
Since the project focus is on water quality improvement, it is eligible for low-interest (2.0%) State Revolving Fund (SRF) loan funding, and this project has been included on the Project ...
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