Iowa DNR News
Environmental Services Division

For immediate release	June 15, 2007

CITY OF CLINTON SLOW TO REPORT DISCHARGE TO MILL CREEK

MEDIA CONTACT: Dennis Ostwinkle at (319) 653-2135.

DES MOINES – The City of Clinton discovered a discharge of partially treated 
wastewater on Thursday about 3:30 p.m.

The discharge of about 5 gallons per minute reached Mill Creek, which drains 
into Beaver Slough before flowing into the Mississippi River.

City workers traced the discharge to a previously repaired crack in the 
primary clarifier. They sealed the crack Thursday, but found it was still 
leaking on Friday morning. The city contained about 1,000 gallons of 
wastewater behind a temporary dam and is pumping it back to the clarifier.

An unknown amount of wastewater reached the creek. The city will monitor the 
area around the clock to prevent additional discharges, but estimates it 
will take a week to complete repairs.

Facilities are required to report bypasses caused by mechanical failures to 
the DNR within 12 hours of onset or discovery. The DNR will send the 
facility a notice of violation for failing to report the discharge within 
that time.

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