GREEN BAY, WI (WTAQ) - State transportation officials say three supporting piers on the now closed I-43 Leo Frigo Memorial Bridge are being fitted with equipment that is similar to earthquake detection monitors.
Tiltmeters and accelerometers will be used to warn of any movement in pier 22 which has settled about two feet causing the bridge deck to sag. The adjacent piers are also getting equipped.
The equipment will monitor any movement and will be connected to a warning system.
“If that movement occurs, it will activate a loud siren system resulting in our worker evacuating the immediate area,” said Bridge repair project Chief Engineer Brian Roper.
A team of federal and state transportation officials, bridge experts and consultants have been assembled to look into what is happening to the bridge.
"We need to make sure everyone is safe out there before we do anything around Pier 22, either below or above," said WisDOT NE Region Director Will Dorsey in a release. "Once the safety measures are in place, then we can go in and start collecting soil samples, taking readings on the piers themselves, and using laser and visual inspections."
The bridge was closed just before dawn Wednesday after motorists called in a nearly three foot dip on the eastern side of span.
No other pier movement has been detected at this point.