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Action News digging into cause of erosion on Overland Bridge

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Updated: 1/09 11:51 pm
JACKSONVILLE, Fla. -- Unnerving congestion and overwhelming confusion is how drivers describe the closure of the Overland Bridge in the St. Nicholas and San Marco areas.
One driver slipped through the cones and traveled onto to the closed-off on-ramp to 95. It's just a sign of the chaos this $30,000 mistake has caused drivers for more than 12 hours now.
"I looked at the light, there were three cycles of lights that I had to wait before I could actually go. Some very nice driver let me in," said Cari Watford.
FDOT said a combination of vibrating machinery and heavy erosion in the soil beneath two on-ramps to the bridge caused the roadway to buckle.
Now they're pouring in more concrete to fix the eight-inch 8-inch crack. "If you have some minor crack and over years becomes a wider crack, then this kind of vibration and erosion might compromise its integrity," said Dr. Adel ElSafty.
We asked  ElSafty to meet us at the construction site and walk us through the process. A professor of engineering at the University of North Florida and a known expert in the design of bridges, he told us that the challenging part is over.
"The best thing to do is what they're doing right now, which is building from the bottom up, which is making sure that the base material and the sub-base are solid and sound," said ElSafty.
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