• Excess stormwater can cause flooding during rain events.
  • The pervious concrete captures at least 15,000 cubic feet (almost 6 Olympic size swimming pools) of stormwater within this project area during each rain event. More water is captured during long low-intensity rainfalls rather than during short high intensity events. Stormwater captured by the pervious concrete helps to reduce flooding issues.
  • Beneath the pervious concrete there is a 3-foot deep by 3-foot wide infiltration trench for effective capture of stormwater.
  • Captured stormwater is filtered and infiltrated for groundwater recharge.

The El Rio Retrofit for Groundwater Recharge
project includes approximately one mile
of precast pervious concrete panels and
subsurface infiltration trenches.