BALTIMORE (AP) — The Baltimore City Department of Public Works estimates that approximately 5.7 million gallons of wastewater mixed with rainwater overflowed into the Jones Falls.

A department news release says the gallons of wastewater mixed with rainwater overflowed into the Jones Falls on Sunday, and 36,000 gallons overflowed into the Western Run.

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The Baltimore Sun reports that such releases happen every time it rains heavily in the city: precipitation enters the sewer mains through cracks and breaks, overwhelming it.

Structured overflows were designed as part of Baltimore’s sewer system more than 100 years ago.

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According to the department, they’re being eliminated as part of the city’s $2 billion consent decree sewer rehabilitation work.

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