A main sewer line that broke in the Clinton County town of Calamus resulted in sewage flowing Saturday into a road ditch that flows to Calamus Creek.

The broken line was discovered and reported shortly before noon Saturday, the Iowa Department of Natural Resources said in a news release. The main serves less than half the city and arrangements were being made to have repairs completed as soon as possible.

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It was unknown Saturday afternoon how much volume is being bypassed the sewage treatment plant, but there is a high mixture of stormwater because of recent rainfall.