The jacks that are being removed from the bridge
Weather permitting, motorists are advised that rolling roadblocks starting around midnight Wednesday, April 17 will hold up traffic on northbound Interstate 83 heading to eastbound Route 322 through the Eisenhower Interchange in Swatara Township, Dauphin County. The traffic delays are necessary in order to keep traffic off of the bridge that carries eastbound Route 322 into the Eisenhower Interchange while construction crews remove the jacks that were installed last week to jack up the superstructure of the bridge to enable replacement of the bearings on which the superstructure sits on an abutment.
The State Police will start the rolling roadblock at around midnight on northbound Interstate 83 in the vicinity of Exit 44A (13th Street) leading to the Eisenhower Interchange. In addition, several ramps accessing northbound I-83 and eastbound Route 322 will be blocked during this operation. These include the on-ramps to northbound I-83 from 19th Street (Exit 44B) and Paxton Street (Exit 45) as well as the on-ramp from southbound Eisenhower Boulevard to eastbound Route 322.
Traffic on Eisenhower Boulevard will also be stopped as a safety precaution so that there are no motorists driving under the Route 322 bridge while the operation is underway.
The rolling roadblock on Route 322 and the traffic stoppages on Eisenhower Boulevard and the ramps should not take longer than 15 minutes. If more time is necessary to remove the jacks, the construction crews will later conduct a second rolling roadblock on Route 322 and traffic stoppage on Eisenhower Boulevard to complete the operation – again, for no longer than 15 minutes.
There are two other locations on piers supporting the bridge where bearings will need to be replaced in the coming weeks. Similar to this instance, the superstructure at each location will need to be jacked up just a fraction of an inch in order to remove the weight of the bridge on the bearings so that they can be removed. PennDOT will announce these operations in advance.
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