Westbound I-10 to close west of downtown Phoenix this weekend Crews removing falsework on bridge structure above I-10 as part of South Mountain Freeway

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PHOENIX – Motorists traveling to the West Valley this weekend should allow extra travel time with westbound Interstate 10 (Papago Freeway) closed at 59th Avenue for construction of the Loop 202 South Mountain Freeway, according to the Arizona Department of Transportation.

Westbound I-10 at 59th Avenue will be closed from 10 p.m. Friday, Sept. 15, to 5 a.m. Monday, Sept. 18, so a large crane can safely remove a 90-foot-long steel falsework beam and steel columns that temporarily supported a concrete structure for a future flyover bridge.

During the weekend closure, westbound I-10 traffic will be able to exit the freeway at the 59th Avenue off-ramp and re-enter at the 59th Avenue on-ramp, but delays are likely.

To avoid delays on westbound I-10, motorists should consider alternate routes, including the Loop 101 (Agua Fria Freeway) west of Interstate 17, or exiting I-10 sooner and taking local streets to re-enter past the closure point.

The westbound I-10 on-ramps at 43rd and 51st avenues will be closed as well to help reduce traffic backups.

The steel beam and columns are no longer needed to support the concrete structure, known as a straddle bent, because the concrete has been cured and reinforced. This bridge structure will be part of the westbound I-10 connection to the southbound Loop 202 South Mountain Freeway.

The straddle bent, which is one of seven on the project, is a large horizontal concrete pier cap supported by vertical columns. Those columns are spaced far enough apart to allow room for the I-10 lanes traveling beneath the straddle bent, and are commonly used on flyover bridge structures throughout the Valley.

ADOT works to inform the public about planned highway restrictions, but there is a possibility that unscheduled closures or restrictions may occur. Weather can also affect a project schedule. To stay up to date with the latest highway conditions around the state, visit ADOT’s Arizona Traveler Information site at az511.gov or call 511.

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