The town of Carnuel, New Mexico, is nestled into Tijeras Canyon along Interstate 40 and the former Route 66. Four bridges built in 1978 span the Tijeras Arroyo (a steep gully formed by fast-flowing water). Located east of Albuquerque, the bridges serve as a major freight corridor and gateway into the city.

Parametrix assisted the New Mexico Department of Transportation, in cooperation with the Federal Highway Administration, to conduct a study of the four bridges located near the interchange with NM Highway 333 to evaluate their condition and develop recommendations to address physical deficiencies. 

Parametrix provided structural, environmental, and public outreach support for the project. Public input included an in-person public meeting, a recorded presentation, and a project website.

The recommendations from the study include:

• Replacement of I-40 westbound and eastbound bridges: These bridges have significant deterioration requiring expensive repairs to extend their service life a few more years; therefore, bridge replacement is the preferred option.
• Rehabilitation of south frontage road bridge and westbound off-ramp: These bridges are in satisfactory condition and can remain in service with minor repairs and maintenance.