This news release is available online.
Morrison Bridge lane closure for lift span inspection
Friday, 1/24/14 - 4:44 pm
Contacts: Mike Pullen, Communications Office, 503-209-4111, firstname.lastname@example.org
One eastbound lane on the Morrison Bridge will be closed for roughly three weeks starting at 7 a.m. on Sunday, January 26 to allow Multnomah County to begin an inspection of the lift span deck.
The fiber reinforced polymer (FRP) deck that was installed on the lift span in 2011 – 2012 has shown signs of premature wear. Deck attachments for some panels have loosened. County staff have monitored the deck surface regularly in recent months as a precaution. The inspection will allow county crews to remove each deck panel in the southernmost lane and inspect it for wear. Degraded panels will be replaced with new panels. All panels either replaced or re-used during the inspection will be re-attached to the deck with a huckbomb fastener that is expected to provide a more durable attachment than the existing screws.
A forensic engineering consultant is working with the county to analyze the worn FRP panels to determine the cause of the wear and the extent and method of repair needed. The county is pursuing litigation related to the FRP fabrication and installation by other parties.
The SW Naito Avenue onramp and the SE Water Avenue offramp from the bridge will remain open during the work. All freeway ramps will remain open also. On weekdays, the middle eastbound lane will be closed on the lift span from 7 a.m. to 3 p.m. for safety during the work.
After panels in the eastbound lane are inspected, the outside westbound lane will be closed for three weeks for a similar inspection. The county expects that information gained from these inspections will help define the extent and method of repairs needed for a long-term solution for the deck.
Multnomah County maintains the Morrison Bridge, five other Willamette River bridges, and 300 miles of roads. For more information, visit www.multco.us/bridges.
Mike Pullen | Multnomah County Communications Office | 503-209-4111 | newsroom | twitter |facebook