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Projects and Programs | Route 710 Tunnel Technical Feasibility Assessment

Route 710 Tunnel Technical Feasibility Assessment

Metro has completed the feasibility assessment of a tunnel alternative to extend the 710 Freeway from its current terminus at Valley Boulevard in the City of Los Angeles to I-210 in the City of Pasadena.

Over the past year, Metro staff, in coordination with its consultant team, has been conducting a preliminary feasibility assessment of a bored or mined tunnel to extend the Route 710. This assessment has been performed in conjunction with a working group composing of technical staff from Caltrans, SCAG, and the Cities of Alhambra, La Canada Flintridge, Los Angeles, Pasadena, San Marino and South Pasadena. Although the Working Group provided technical input throughout the study, its technical contribution does not represent individual members’ or their agencies’ endorsement of the assessment results.

The feasibility of tunneling was assessed from the physical, environmental and financial perspectives. Generally, the study concluded that the tunnel concept is feasible. Potential environmental impacts were identified, however preliminary assessment concluded that these impacts could be minimized, eliminated or mitigated. No insurmountable environmental issues were identified that would preclude further consideration of the tunnel alternative. The technical feasibility assessment considered a myriad of tunnel alternatives with construction costs ranging from approximately $2.3 billion to $3.6 billion (2006 dollars).

Full Report (PDF, 8.1MB)

Public and Agencies Information Meetings

A public information meeting was held on June 22, 2006 from 6 PM to 8 PM at the Lake Avenue Church in Pasadena. Community Meeting (PDF, 30MB)

Similar presentations will be made at City Council meetings for the cities of Alhambra, La Canada Flintridge, Los Angeles (Transportation Committee), Pasadena, San Marino and South Pasadena, as well as the San Gabriel Valley COG Transportation Committee. Meeting Schedule (PDF, 158KB)

Contacts

To submit Comments and Questions:

Contact (213) 922-7102 or 710tunnel@metro.net

Comments will be accepted until September 15, 2006.

To obtain hard copies of the report and other available related materials:

Contact (213) 922-2333 or RMC@metro.net