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Alto Tunnel Geotechnical Study Community Meeting

January 18, 2017 @ 6:30 pm - 8:30 pm

Alto Tunnel Geotechnical Study Community Meeting

The County of Marin is hosting an informational community meeting to discuss the upcoming geotechnical investigation of Alto Tunnel and answer questions related to the effort.

The purpose of the study is to observe the tunnel’s structural condition in order to better identify the scope of improvements that would be required to reopen the tunnel. According to the project site, the tunnel’s conditions will be observed using remote cameras and laser mapping technology that will be inserted into the tunnel at two locations:

  • In the vacant County-owned lot south of 35 Underhill Road (just south of Upperhill Road)
  • Adjacent to Chapman Drive at Camino Alto

A final work plan detailing what is planned at each site and when will be presented at the meeting.


January 18, 2017
6:30 pm - 8:30 pm
Event Categories:


County of Marin – Victoria Eisen


Corte Madera Community Center
498 Tamalpais Drive
Corte Madera , CA United States
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