Stormwater Drainage & Waterways

Stormwater is the runoff of rain or melting hail or snow. Excess water goes into our storm sewers through grated street drains. These empty into waterways: rivers, creeks or the ocean. When we manage stormwater properly, we keep our streams and rivers healthy.

Stormwater Drainage Facts 

We have many different ways that we manage stormwater.

  • Watercourse and ditches:  536.5 km 
  • Catch basin/silt traps/oil interceptors:  13,419
  • Manhole and drainage structures:  6,949
  • Stormwater gravity main:  567 km
  • Stormwater detention ponds:  17
  • Rain gardens:  17