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Rainfall at City-Operated Rain Gauges
The City of Ann Arbor operates and maintains five tipping bucket rain gauges (5-min resolution) which are located at Barton Dam, South Industrial Hwy, Jackson Ave/Parklake... -
Floodplain
That portion of the river valley, adjacent to the channel, which is built of sediments deposited during the present geological / climatic regime. Based on statistically derived... -
Catch Basins
Locations of public, private, County Drain Commission, and University owned catch basins/inlets as part of the City's greater storm water network. -
Allen Creek Historic Map
Take a tour through along the original path of Allen Creek through this map and see historic photos from various points. You can learn more about the history of Allen CreekCatch Basin Cleaning
Monitor the city's progress toward its annual goals of cleaning catch basins. Also includes a map of which catch basins have been cleaned this cycle. Change which fiscal year's...Storm Pipe Inspections
Monitor the city's progress toward its annual goals performing CCTV inspections on its stormwater pipes. These include collectors, inlet leads, and culverts. View activity by...Stormwater Impervious Surfaces and Credits
This map shows the amount of impervious area by parcel that is used to determine stormwater utility fees, as well as what stormwater rate credits a particular site currently...Rain Gauges Dashboard
An interactive way to visualize rainfall data collected from the city's five tipping-bucket rain gauges, going back to 2013. The raw data behind this dashboard is also available...Floodway
"Regulatory Floodway" means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without...