Has Peoria done anything in the past to reduce overflows?

Starting in 1987 (through 1994), Peoria proactively undertook about $10 million (in 1980s dollars) in projects to reduce overflows. Projects included: Separating sewers in seven drainage basins by constructing either new sanitary or storm sewers to separate the combined flows; Constructing swirl concentrators at two locations to remove trash from overflows; Using a mile-long, 60-inch and 48-inch diameter sewer to store excess flows until downstream capacity is available in the riverfront interceptor; Installing gates to control the amount of flow discharged to the interceptor sewer and backflow valves to prevent the river from flowing into the interceptor sewers during flood conditions; Constructing treatment plant improvements and installing telemetry to monitor and report on sewer flows.

The benefits included reducing …

  • The number of CSO locations is from 20 to 16.
  • The average days of overflows from 40 a year to 28 a year.
  • The overflow volume from an estimated 840 million gallons averages to 250 million gallons average in a typical year.
  • The amount of trash discharging into the Illinois River.

Show All Answers

1. Why does raw sewage overflow into the Illinois River during wet weather?
2. Why were our sewers built this way?
3. What are the harmful effects?
4. Has Peoria done anything in the past to reduce overflows?
5. Why do we have to do even more?
6. How are we proposing to reduce overflows now?
7. When will a decision be made whether we can move forward?
8. How will we pay for it?
9. What happens if we don't fix the problem?
10. Why should all Peorians care about this, no matter where we live?