I-10 bridges over Gila River complete first phase of widening

Summarised from 2 outlets · Updated 13 Nov, 23:32 · Archive

Crews have finished new Interstate 10 bridges over the Gila River near Casa Grande, Arizona, marking the first phase of a project to widen the freeway between Phoenix and Tucson.

Crews finished the new Interstate 10 bridges over the Gila River near Casa Grande on Thursday, completing the first of four segments in the I-10 Wild Horse Pass Corridor Project. Construction on the overall project began in May 2024, with the aim of widening a 26-mile stretch of freeway to three lanes in each direction between Phoenix and Tucson.

The first phase cost about $71.2 million and involved removing the old bridges crossing the Gila River and building new ones that are wider and higher. The new bridges now feature three lanes in each direction with wider shoulders. The third lane will open once the remaining three segments are finished. The speed limit is currently reduced to 55 mph between Phoenix and Casa Grande whilst crews work.

Segment 2 began construction in January 2026 on 10 miles of freeway north of Casa Grande and is expected to take about two years and cost $267.9 million. Segment 3, on about 11 miles from the Phoenix/Chandler area south to the Gila River, began recently and is expected to last until late 2029, costing $469.5 million. Segment 4 is expected to begin in 2027 or 2028 and last about 18 months, costing $158.4 million. The full project is projected to cost just under $1 billion.

I-10 bridges over Gila River complete first phase of widening — Image: KOLD

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New I-10 bridges over Gila River finish first phase of Phoenix-Tucson widening projectCrews finished the new I-10 bridges over the Gila River near Casa Grande, the first of four segments widening the freeway to three lanes between Phoenix and Tucson.KOLD · 13 Nov, 19:33
New I-10 bridges over Gila River finish first phase of Phoenix-Tucson widening projectCrews finished the new I-10 bridges over the Gila River near Casa Grande, the first of four segments widening the freeway to three lanes between Phoenix and Tucson.Azfamily · 13 Nov, 16:44

In this story: Interstate 10 · Gila River · Casa Grande · Phoenix · Tucson · Arizona Department of Transportation

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