Maintenance and Operations Stormwater Drainage System The City
of Minneapolis owns and maintains many types of stormwater
facilities, including: - 600 miles of storm drains - 17 miles of
storm tunnels - 25 stormwater pump stations - 145 grit chambers
- 390 stormwater outlets - At least 20 stormwater ponds and man-
made wetlands - Over 18,200 storm manholes - Over 25,000 catch
basins An inventory and condition assessment study has recently
been completed for Minneapolis storm tunnels. A rehabilitation
program is being developed based on this study to make needed
repairs and improvements. Proper maintenance and operation of
the stormwater drainage system helps minimize pollutants
entering City surface waters. Since streets act as collection
channels during a rainstorm, they must be considered part of the
stormwater drainage system. Maintenance of the storm drainage
system includes: - Cleaning and repairing damage to storm drain
lines, catch basins and manholes - Inspecting and maintaining
pump stations, grit cha