{"id":null,"ids":[],"kind":"named in documents","name":"Bay Bridge West spans","tied_by":"name","block":null,"release":"v0.7.1","rows_columns":["t","id","year","y","date","kind","topic","outcome","summary","tier","source","leaf","scan","addr","quote","note","title","how","g","rec","sc"],"rows":[["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:15/1",2000,1959,"1959","event","study or report",null,"Bay Bridge west spans · event: Rail on the west spans","unverified","C124925065",15,"https://archive.org/details/C124925065/page/n14",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:15/2",2000,1965,"1965/67","finding","study or report",null,"Bay Bridge west spans · other: Lane load derived from 1965/67 Caltrans study placing live load from all 10 lanes","unverified","C124925065",15,"https://archive.org/details/C124925065/page/n14",null,null,null,"Bay Bridge rail feasibility study","n","a",0,0.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:15/3",2000,1965,"1965/67","finding","study or report",null,"Bay Bridge west spans · finding: West span structural demands under proposed lane and rail loads established by proportioning 1965/67 values","unverified","C124925065",15,"https://archive.org/details/C124925065/page/n14",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:15/4",2000,2000,"","finding","study or report",null,"Bay Bridge west spans · finding: Demands on some structural components reported higher than actual impacts because train lengths are much less than span","unverified","C124925065",15,"https://archive.org/details/C124925065/page/n14",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:46/1",2000,2000,"","project","study or report",null,"Bay Bridge West spans · other: post-retrofit West spans studied for rail impacts","unverified","C124925065",46,"https://archive.org/details/C124925065/page/n45",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:46/2",2000,2000,"","finding","study or report",null,"Bay Bridge West span superstructure · finding: worst case: strength of only a few members increased by 12%, remainder by less or not at all","unverified","C124925065",46,"https://archive.org/details/C124925065/page/n45",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:47/10001",2000,2000,"","alternative","study or report",null,"Bay Bridge rail feasibility study: below deck option · alternative: Adds two lanes to the bridge below the current lower deck","unverified","C124925065",47,"https://archive.org/details/C124925065/page/n46",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:48/2",2000,2000,"","finding","study or report",null,"Bay Bridge rail feasibility study: rail service on the bridge deck · other: If two directions of rail service are placed on the bridge deck, a minimum of three traffic lanes would be displaced","unverified","C124925065",48,"https://archive.org/details/C124925065/page/n47",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:54/2",2000,2000,"","project","study or report",null,"Bay Bridge West Span rail · other: Adding 34 feet of deck is the minimum width for bi-directional train operation","unverified","C124925065",54,"https://archive.org/details/C124925065/page/n53",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:58/1",2000,2000,"","building","study or report",null,"Bay Bridge West spans · other: 3/4-inch epoxy overlay installed by Caltrans","unverified","C124925065",58,"https://archive.org/details/C124925065/page/n57",null,null,null,"Bay Bridge rail feasibility study","n","a",0,0.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:62/3",2000,2000,"","finding","study or report",null,"Bay Bridge West spans · other: current lane width of 11'7\"","unverified","C124925065",62,"https://archive.org/details/C124925065/page/n61",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:62/8",2000,2000,"","recommendation","study or report",null,"Bay Bridge West spans rail alignment · other: place track outside the West spans to keep five lanes together in each direction","unverified","C124925065",62,"https://archive.org/details/C124925065/page/n61",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:8/4",2000,2000,"","finding","study or report",null,"Bay Bridge rail service · finding: No rail services would travel at high speeds over the bridge, particularly over the West spans","unverified","C124925065",8,"https://archive.org/details/C124925065/page/n7",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:47/1",2000,2000,"2000","alternative","study or report",null,"Bay Bridge rail feasibility - west spans rail options · alternative: three viable options: adding lanes below deck, alongside lower deck, alongside upper deck","unverified","C124925065",47,"https://archive.org/details/C124925065/page/n46",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:47/2",2000,2000,"2000","alternative","study or report",null,"Bay Bridge below deck rail option · proposes: adds two lanes below the current lower deck","unverified","C124925065",47,"https://archive.org/details/C124925065/page/n46",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:54/10001",2000,2000,"2000","finding","study or report",null,"Bay Bridge rail feasibility study · other: Adding 34 feet of deck is the minimum width required for bi-directional train operation on the West spans","unverified","C124925065",54,"https://archive.org/details/C124925065/page/n53",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:55/4",2000,2000,"2000","measure","study or report",null,"BART rail option on Bay Bridge West spans · other: Total added load per rail, BART","unverified","C124925065",55,"https://archive.org/details/C124925065/page/n54",null,null,null,"Bay Bridge rail feasibility study","n","a",0,0.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:55/5",2000,2000,"2000","measure","study or report",null,"[name withheld] option on Bay Bridge West spans · other: Total added load per rail, [name withheld]","unverified","C124925065",55,"https://archive.org/details/C124925065/page/n54",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-2.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:55/6",2000,2000,"2000","measure","study or report",null,"[name withheld] (SEPTA) option on Bay Bridge West spans · other: Total added load per rail, [name withheld] (SEPTA)","unverified","C124925065",55,"https://archive.org/details/C124925065/page/n54",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-2.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:55/7",2000,2000,"2000","measure","study or report",null,"[name withheld] (Amtrak) option on Bay Bridge West spans · other: Total added load per rail, [name withheld] (Amtrak)","unverified","C124925065",55,"https://archive.org/details/C124925065/page/n54",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-2.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:6/3",2000,2000,"2000","project","study or report",null,"Bay Bridge West spans seismic strengthening · other: Strengthening of the West spans is already underway","unverified","C124925065",6,"https://archive.org/details/C124925065/page/n5",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:68/3",2000,2000,"2000","measure","study or report",null,"Bay Bridge West spans · cost usd: values of $2,000 per square foot are appropriate","unverified","C124925065",68,"https://archive.org/details/C124925065/page/n67",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:68/4",2000,2000,"2000","measure","study or report",null,"Bay Bridge West spans · cost usd: over $1 billion in investment on that span alone","unverified","C124925065",68,"https://archive.org/details/C124925065/page/n67",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:7/3",2000,2000,"2000","project","study or report",null,"Bay Bridge rail feasibility study · other: Seismically retrofitted West spans considered for the study","unverified","C124925065",7,"https://archive.org/details/C124925065/page/n6",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:87/2",2000,2000,"2000","measure","study or report",null,"Bay Bridge west spans structural improvements · cost usd: as high as $3 Billion","unverified","C124925065",87,"https://archive.org/details/C124925065/page/n86",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:87/3",2000,2000,"2000","finding","study or report",null,"Bay Bridge west spans · finding: West spans retrofitted but not replaced under the current plan","unverified","C124925065",87,"https://archive.org/details/C124925065/page/n86",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:9/1",2000,2000,"2000","alternative","study or report",null,"Bay Bridge West Spans rail · alternative: Rail suspended below the current lower deck","unverified","C124925065",9,"https://archive.org/details/C124925065/page/n8",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:9/2",2000,2000,"2000","finding","study or report",null,"Bay Bridge West Spans · finding: None of the rail alternatives is considered infeasible","unverified","C124925065",9,"https://archive.org/details/C124925065/page/n8",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:9/3",2000,2000,"2000","finding","study or report",null,"Bay Bridge West Spans main cable · finding: Strengthening of main cable anticipated; two new main suspension cables or new tower legs needed","unverified","C124925065",9,"https://archive.org/details/C124925065/page/n8",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:9/4",2000,2000,"2000","finding","study or report",null,"Bay Bridge West Spans seismic · finding: Seismic improvements beyond the current retrofit would be necessary","unverified","C124925065",9,"https://archive.org/details/C124925065/page/n8",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124925065:55/10003",2000,2000,"July 2000","finding","study or report",null,"Bay Bridge west spans rail load · other: Total added load per rail: BART 13,560; [name withheld] 14,000; [name withheld] (SEPTA) 14,660; [name withheld] (Amtrak) 14,820","unverified","C124925065",55,"https://archive.org/details/C124925065/page/n54",null,null,null,"Bay Bridge rail feasibility study","n","a",0,-1.0]]}