Village of Delta Annual CSO Notification

The village currently has 4 Combined Sewer Overflow (CSO) locations:

• 2PB00003004 Adrian St lift station Lat 41N 34’ 05”; Long 84W 00’ 06”
• 2PB00003006 Ketch-a-bite Lat 41N 34’ 58”; Long 84W 00’ 52”
• 2PB00003010 Snakepit at railroad Lat 41N 34’ 25”; Long 84W 00’ 37”
• 2PB00003014 Storm detention basin Lat 41N 34’ 28”; Long 83W 59’ 41”

All 4 CSO’s discharge into Bad Creek.
The Storm detention basin provides aeration and settling treatment
The Village had 8 CSO events in 2019. There were no known public access areas impacted by these events. The sewer separation projects on Superior, Lincoln, and Providence streets along with the installation of the storm water detention basin has had a tremendous effect on the Village’s CSO discharges both in quantity and duration. The basin captures most storm runoff events only discharging when there have been significant amounts of precipitation. The quality of the water being discharged has also improved. Because of the settling that takes place in the basin when it does discharge the strength of the sewage has been greatly diminished.

CSO discharge events:
Start date End date CSO location Quantity of discharge Cause Precipitation amount in inches
2/08/2019 2/09/2019 2PB00003014 .008 MG Precipitation 0.91
3/10/2019 3/12/2019 2PB00003014 0.052 MG Precipitation 0.95
3/14/2019 3/16/2019 2PB00003014 0.280 MG Precipitation 0.73
3/31/2019 4/03/2019 2PB00003014 0.852 MG Precipitation 1.28

04/20/2019 04/24/2019 2PB00003014 1.72 MG Precipitation 2.66

04/25/2019 05/07/2019 2PB00003014 5.87 MG Precipitation 3.01
06/01/2019 06/04/2019 2PB00003014 1.505 MG Precipitation 1.04
06/05/2019 06/06/2019 2PB00003014 0.533 MG Precipitation 0.85

2019 CSO discharges average CBOD of 12.7 mg/L, Suspended Solids of 17.5 mg/L and Ammonia of 1.6 mg/L. These discharge averages compare favorably to our actual Final Effluent limits and are drastically below the typical Raw Influent levels.
The Village’s Long-Term Control Plan has now been fully implemented. CSO discharges are only expected to occur after significant amounts of precipitation. Typically, this is expected to be in excess of 2.5 inches of precipitation in a short period, or several continuous days of significant precipitation.
Contact information
Brad Peebles
Village Administrator