<Table> <Tr> <Th_colspan="2"> San Francisco--Oakland Bay Bridge </Th> </Tr> <Tr> <Td_colspan="2"> The western section of the San Francisco - Oakland Bay Bridge </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 37 ° 49 ′ 5" N 122 ° 20 ′ 48" W ﻿ / ﻿ 37.81806 ° N 122.34667 ° W ﻿ / 37.81806; - 122.34667 Coordinates: 37 ° 49 ′ 5" N 122 ° 20 ′ 48" W ﻿ / ﻿ 37.81806 ° N 122.34667 ° W ﻿ / 37.81806; - 122.34667 </Td> </Tr> <Tr> <Th> Carries </Th> <Td> 10 lanes of I - 80 throughout, and pedestrians and bicycles east of Yerba Buena Island (YBI) </Td> </Tr> <Tr> <Th> Crosses </Th> <Td> San Francisco Bay via YBI </Td> </Tr> <Tr> <Th> Locale </Th> <Td> San Francisco and Oakland </Td> </Tr> <Tr> <Th> Owner </Th> <Td> Caltrans </Td> </Tr> <Tr> <Th> Maintained by </Th> <Td> Caltrans and the Bay Area Toll Authority </Td> </Tr> <Tr> <Th> ID number </Th> <Td> <Ul> <Li> 34 0003 (West) </Li> <Li> 34 0004 (YBI Tunnel) </Li> <Li> 33 0025 (East) </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Characteristics </Th> </Tr> <Tr> <Th> Design </Th> <Td> Double - decked suspension spans (two, connected by center anchorage), tunnel, cast - in - place concrete transition span, self - anchored suspension span, precast segmental concrete viaduct </Td> </Tr> <Tr> <Th> Material </Th> <Td> Steel, concrete </Td> </Tr> <Tr> <Th> Total length </Th> <Td> West: 10,304 ft (3,141 m) East span: 10,176 ft (3,102 m) Total: 4.46 miles (7.18 km) excluding approaches </Td> </Tr> <Tr> <Th> Width </Th> <Td> West: 5 traffic lanes totaling 57.5 ft (17.5 m) East: 10 traffic lanes totaling 258.33 ft (78.74 m) </Td> </Tr> <Tr> <Th> Height </Th> <Td> West: 526 ft (160 m) </Td> </Tr> <Tr> <Th> Longest span </Th> <Td> West: two main spans 2,310 ft (704 m) East: one main span 1,400 ft (430 m) </Td> </Tr> <Tr> <Th> Clearance above </Th> <Td> Westbound: 14 feet (4.3 m), with additional clearance in some lanes Eastbound: 14.67 feet (4.47 m) </Td> </Tr> <Tr> <Th> Clearance below </Th> <Td> West: 220 feet (67 m) East: 191 feet (58 m) </Td> </Tr> <Tr> <Th_colspan="2"> History </Th> </Tr> <Tr> <Th> Designer </Th> <Td> Charles H. Purcell </Td> </Tr> <Tr> <Th> Construction start </Th> <Td> July 8, 1933 </Td> </Tr> <Tr> <Th> Opened </Th> <Td> November 12, 1936; 80 years ago (1936 - 11 - 12) </Td> </Tr> <Tr> <Th_colspan="2"> Statistics </Th> </Tr> <Tr> <Th> Daily traffic </Th> <Td> 260,000 </Td> </Tr> <Tr> <Th> Toll </Th> <Td> Cars (east span, westbound only) $6.00 (rush hours) $2.50 (carpool rush hours) $4.00 (weekday non-rush hours) $5.00 (weekend all day) </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th_colspan="2"> U.S. National Register of Historic Places </Th> </Tr> <Tr> <Th> Designated </Th> <Td> August 13, 2001 </Td> </Tr> <Tr> <Th> Reference no . </Th> <Td> 00000525 </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Td_colspan="2"> San Francisco--Oakland Bay Bridge Location in California </Td> </Tr> </Table> <Tr> <Th_colspan="2"> San Francisco--Oakland Bay Bridge </Th> </Tr>

When was the san francisco bay bridge built