First believed to be a possible result of mine subsidence due to the road’s proximity to a historic mine about 120 feet beneath the surface, Todd said that possibility has been eliminated after a closer study.
The damage didn’t produce enough quantity of debris to warrant the coal mine as the cause, and highway inspectors next turned their attention to a nearby streambed that might have led to partial erosion of the roughly 60-foot section of roadway. That theory was disproved as well, Todd said.
“There’s some movement (of water) but not enough to cause that (the one-foot drop of roadway),” Todd said.
Todd said the most likely theory now is that it is simply a result of this year’s harsh winter conditions. He said road crews in the area have seen a larger number of highway issues, likely all related to the massive amounts of snowfall during the winter months.
Signs are in place to caution motorists about the dip along the Audubon Parkway.No date has been set for the upcoming geological study, but Todd said it’s expected to happen within the next couple of weeks.
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