Posey and Webster Street tubes
From Underfoot
Q7233047
The Posey and Webster Street Tubes are two parallel underwater tunnels connecting the cities of Oakland and Alameda, California, running beneath the Oakland Estuary. Both are immersed tubes, constructed by sinking precast concrete segments to a trench in the Estuary floor, then sealing them together to create a tunnel. The Posey Tube, completed in 1928, currently carries one-way (Oakland-bound) traffic under the Estuary, while the Webster Street Tube, completed in 1963, carries traffic from Oakland to Alameda.
Wikimedia, Wikidata
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Location: 37.7875, -122.277, KML, Cluster Map, Maps,
22 places
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Rockaway quarry ⓘ
abandoned limestone quarry in Pacifica, California -
Baker–Barry Tunnel ⓘ
road tunnel -
Berkeley Hills Tunnel ⓘ
rapid transit tunnel in California, US -
Broadway Tunnel ⓘ
road tunnel in San Francisco, California, United States -
Caldecott Tunnel ⓘ
road tunnel through the Berkeley Hills between Oakland and Orinda, California, USA -
Claremont Tunnel ⓘ
utility tunnel in Alameda County, California -
Fillmore Street Tunnel ⓘ
proposed San Francisco streetcar tunnel -
Fort Mason Tunnel ⓘ
former rail tunnel in San Francisco -
Franklin Tunnel ⓘ
rail underpass in Contra Costa County, California -
MacArthur Tunnel ⓘ
road tunnel in San Francisco -
Market Street Subway ⓘ
subway tunnel in San Francisco, California, United States -
Mile Rock Tunnel ⓘ
Utility tunnel in San Francisco -
Northbrae Tunnel ⓘ
road tunnel in Berkeley, California, US -
Posey and Webster Street tubes ⓘ
underwater tunnels in California -
Posey Tube ⓘ
Tunnel in Alameda County, California -
Stockton Street Tunnel ⓘ
three-block tunnel in San Francisco, between Chinatown and Union Square -
Sunset Tunnel ⓘ
Streetcar tunnel in San Francisco, California, United States -
Transbay Tube ⓘ
underwater rail tunnel under San Francisco Bay -
Twin Peaks Tunnel ⓘ
tunnel in San Francisco, California -
Webster Street Tube ⓘ
Tunnel in Alameda County, California -
Yerba Buena Tunnel ⓘ
Highway tunnel on Yerba Buena Island in California, United States -
Central Subway ⓘ
light rail tunnel in San Francisco, California, US
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| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|
| site | mine | 1776 | Rockaway quarry | quarry | Wikidata |
| site | tunnel | Baker–Barry Tunnel | road tunnel | Wikidata | |
| site | tunnel | Berkeley Hills Tunnel | subway tunnel, Bay Area Rapid Transit | Wikidata | |
| site | tunnel | Broadway Tunnel | road tunnel | Wikidata | |
| site | tunnel | Caldecott Tunnel | road tunnel, California Department of Transportation | Wikidata | |
| site | tunnel | Claremont Tunnel | water tunnel | Wikidata | |
| site | tunnel | Fillmore Street Tunnel | proposed building or structure, tunnel | Wikidata | |
| site | tunnel | Fort Mason Tunnel | tunnel | Wikidata | |
| site | tunnel | Franklin Tunnel | railway tunnel | Wikidata | |
| site | tunnel | MacArthur Tunnel | road tunnel | Wikidata | |
| site | tunnel | Market Street Subway | subway tunnel | Wikidata | |
| site | tunnel | Mile Rock Tunnel | utility tunnel | Wikidata | |
| site | tunnel | Northbrae Tunnel | tunnel | Wikidata | |
| site | tunnel | Posey and Webster Street tubes | road tunnel, California Department of Transportation | Wikidata | |
| site | tunnel | Posey Tube | road tunnel | Wikidata | |
| site | tunnel | Stockton Street Tunnel | road tunnel | Wikidata | |
| site | tunnel | Sunset Tunnel | subway tunnel, San Francisco Municipal Railway | Wikidata | |
| site | tunnel | Transbay Tube | subway tunnel, Bay Area Rapid Transit | Wikidata | |
| site | tunnel | Twin Peaks Tunnel | San Francisco Municipal Railway, railway tunnel | Wikidata | |
| site | tunnel | Webster Street Tube | road tunnel | Wikidata | |
| site | tunnel | Yerba Buena Tunnel | road tunnel | Wikidata | |
| site | tunnel | 2022 | Central Subway | subway tunnel, San Francisco Municipal Railway | Wikidata |