GREEN BAY, Wis. (WFRV) - State transportation officials gave an update Thursday regarding efforts to fix the sagging Leo Frigo Bridge. However, before they can act they need to determine why a support pier shifted in the first place.
While the bridge remains closed, engineers investigating what happened have some good news. All measurements they have taken - show the pier that initially shifted - is now stable.
In video provided by the Wisconsin Department of Transportation, engineers inspect the support pier that settled under the Leo Frigo Bridge, sinking 22 to 27 inches down into the ground.
"Right now the plan it to look at the bridge, find out what's wrong, make sure it's stable, come up with a plan to fix it," said Kim Rudat, NE Region communications manager.
This settling caused a 400-foot long section of the roadway above to sag roughly 1 and half feet. However, Thursday there is good news; measurements using lasers show the pier has stopped moving and the sagging bridge appears stable.
"As of this morning, we haven't detected any further movement in pier 22 - or the adjacent piers," said Rudat.
"At this point based on what we're seeing over time - we're pretty confident it's stable," said Bill Dreher, a WisDOT engineer.
But what these engineers still can't say - is what caused the movement in the first place. Those charged to uncover that - an investigative team - consisting of federal and state officials, along with an unnamed consultant, with national bridge experience.
"That consultant will lead the forensic investigation to find out what caused the event, where the bridge is stable at this time and if it's not stable - what we need to do to make sure it is stable as we go forward with repairing it" Dreher said.
When all those questions are answered, WisDOT officials say they can determine next steps to fix this broken bridge that early Wednesday morning suddenly began to sag.
"Were bringing forward all resources as necessary to expedite this inspection, find out what happened and get it solved," Dreher said.
"There's no question, there is a sense of urgency," Rudat said.
WisDOT engineers are taking measurements of the top of that pier that shifted, every six hours to track any movement. They hope to have a better idea next week on how long their investigation will take.