The Dean Lindsey Memorial Tunnel underpass turns 35 years old on Sunday. The large structure opened in 1990 and is a part of the final mile of I-10.
According to the Arizona Department of Transportation, the tunnel serves more than 200,000 vehicles daily. It spans almost a mile between Third Street and Third Avenue.
ADOT also says the construction of the tunnel required heavy work. Workers placed 1,400 columns for bridge structure support and excavated a million cubic yards of soil.
Its current name comes from the civil engineer Dean Lindsey, who was heavily involved in interstate projects.
In 2021, a modern LED system replaced the tunnel’s sodium lighting.
Arizona Department of Transportation
The Deck Park Tunnel on Interstate 10 in Phoenix in 2024.