710 fwy tunnels needed

Posted in the Glendora Forum

LMR boreholes

Monrovia, CA

#1 Sep 24, 2012
Los Angeles Metropolitan Transportation Authority Board members need to continue studying a tunnel option for the 710 Freeway Gap Closure Project. Letters of support are needed, not those who have held this project up for 40 years plus.

The final EIR should be for and allow tunnels to be used to connect the 4.5 miles of gap between both ends of the freeway.

Many feel by connecting the freeway will actually reduce traffic on the freeways and on surface streets in Alhambra. Thus making it safer for those on the surface streets and allowing tunnels to handle the excessive freeway traffic that once clogged the streets of Alhambra, California.
Double down

Covina, CA

#2 Sep 28, 2012
While other nations move ahead on important infrastructure projects that benefit their economies.

We are arguing over how to complete a vital link in our transportation system, the 710 Freeway.

NIMBYs have successfully stopped many needed projects.

The consequences are obvious, stupid gone wild.
Two tubes

Covina, CA

#3 Oct 10, 2012
Both SCAG and sgvCOG were reported as being supporters of the 710 Tunnels?

Anyone know why?

Grants (or should we say payoffs) from Metro and Caltrans at stake, maybe?
Foreward tunnels

Azusa, CA

#4 Oct 15, 2012
Progress has been stalled but it will be built and continue.

The proposed 710 extension tunnel from Valley in Alhambra to the stub in Pasadena would be a freeway much the same as the freeway tunnels are on the 110 from Pasadena to Downtown L. A. The reduction of surface-street traffic on Fremont would be a tremendous relief.

It is highly unlikely a 710 extension tunnel would create a toll for use.
710 tunnel needed

Monrovia, CA

#5 Feb 2, 2013
These and other safe guards will be used to protect the project and property above the tunnels.

• Crack gauges that straddle existing cracks to measure whether they widen during construction.

• Inclinometers, which are hollow rods inserted vertically along each flank of the tunnel bore. If soil moves, the meters will be nudged sideways.

• Liquid level sensors, water-filled tubes, to function like carpenter’s levels.

• Tiltmeters, which are a foot long and mounted to transmit data about changes in wall or foundation position.

• Deep survey markers, as low as 200 feet, to help calibrate the other metering devices or the path of the drilling machine. These would come in handy after an earthquake.

• Satellite-based interferometric radars, a recent technology meant to detect ground shifts to 1/8-inch accuracy.

This is done by measuring whether peaks and valleys in radar waves bouncing back from the street line up with past measurements.

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