Resources Home » Departments » Systems Planning » Resources Page ContentDataRain gaugesThe 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 Ave, University of Michigan North Campus Area and City Hall.Stream gaugesThe United States Geological Service, in conjunction with the City of Ann Arbor, maintains three stream gauges that measure and track river flow. Archived studies and projectsSanitary Sewer Wet Weather Evaluation ProjectComplete final SSWWEP report (35MB PDF)Q & A log (PDF)Basecamp log (Zip file)2018 Sanitary Sewer Improvement Preliminary Engineering Volume 3: Modeling and Preliminary Engineering Report (17 MB PDF)