Third Street Light Rail, Central Subway
Third Street Light Rail, Central Subway
Operator: San Francisco Municipal Transportation Agency (SFMTA)
Sub Title
Project Overview:
Four new stations were completed in San Francisco along the 1.7 mile extension of the Third Line from 4th Street Caltran Station to the Chinatown Station using an approach known as “deep tunneling” in order to undertake most of the construction.
- 4th and Brannan Station at 4th and Brannan Streets (street level)
- Yerba Buena/Moscone Station at 4th and Folsom Streets (subway)
- Union Square/Market Street Station on Stockton Street at Union Square (subway)
- Chinatown Station at Stockton and Washington Streets (subway)
Project Objective:
San Francisco is well known for their unique public transportation system of trolley coaches and trains. However, with a growing population, as well as being an epicenter for tourism and business, the demand for public transportation outgrew its current capabilities. The Third Street Light Rail Project expands hte current BART train to increase the scope of transportation coverage in the city.
Instrumentation Provided:
- Automated Motorized Total Stations (AMTS)
- Crack Gauges
- Deep Benchmarks
- Portable and In-Place Inclinometers
- Liquid Level Sensors
- Load Cells
- Vibrating Wire Displacement Transducers
- Open Standpipe Piezometers
- Seismographs
- Sound Level Meters
- Vibrating Wire Strain Gauges
- Tape Extensometer
- Tilt Meters
- Tunnel Settlement Points
- Vibrating Wire Crack Gauges
- Vibrating Wire Piezometers
- Surface Settlement Points
- Building Settlement Points
- Vertical Multiple Position Borehole Extensometers (VMPBX)