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Contractors Working To Mitigate Erosion Issues Along I-69 South

By Alex Eady

Posted December 27, 2018

erosion-picture.jpg

Manning says the erosion mitigation work is scheduled to be complete within the next few weeks, weather permitting. (Steve Burns, WFIU/WTIU News)

The Indiana Department of Transportation is working to correct ongoing erosion problems just south of Bloomington along I-69.

INDOT officials say erosion continues to be a problem in a roadside shoulder area of the interstate. Over the last few months, contractors have worked to mitigate the issue.

INDOT Spokesperson Scott Manning says the erosion stems from a number of geological challenges.

“There was an issue with an accumulation of moisture over time penetrating the thin layer of soil that was placed following construction," he says. "The moisture penetrated underneath the soil and caused it to wash away.”

Manning says a unique challenge for the Bloomington area is the presence of karst, or rock that lies close to the soil’s surface.

Contractors have deployed several techniques to help address the issue, including adding drains and placing stone to prevent soil washout.

Erosion poses an environmental concern as it causes the soil to lose its structural integrity over time.

Manning says erosion washout can also pose a threat to traffic safety.

“Any instances of erosion within the right of way we want to monitor very closely and we want to address very quickly. And do so with a comprehensive solution that will take care of the solution a does not allow it to manifest,” he says. 

Manning says the erosion mitigation work is scheduled to be complete within the next few weeks, weather permitting.

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