<Table> <Tr> <Th_colspan="2"> Mike O'Callaghan--Pat Tillman Memorial Bridge </Th> </Tr> <Tr> <Td_colspan="2"> The bridge in front of the Hoover Dam </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 36 ° 0 ′ 45" N 114 ° 44 ′ 29" W ﻿ / ﻿ 36.01250 ° N 114.74139 ° W ﻿ / 36.01250; - 114.74139 ﻿ (Hoover Dam Bypass) Coordinates: 36 ° 0 ′ 45" N 114 ° 44 ′ 29" W ﻿ / ﻿ 36.01250 ° N 114.74139 ° W ﻿ / 36.01250; - 114.74139 ﻿ (Hoover Dam Bypass) </Td> </Tr> <Tr> <Th> Carries </Th> <Td> US 93 </Td> </Tr> <Tr> <Th> Crosses </Th> <Td> Colorado River </Td> </Tr> <Tr> <Th> Locale </Th> <Td> Lake Mead National Recreation Area, Clark County, Nevada--Mohave County, Arizona </Td> </Tr> <Tr> <Th> Official name </Th> <Td> Mike O'Callaghan--Pat Tillman Memorial Bridge </Td> </Tr> <Tr> <Th> Other name (s) </Th> <Td> Hoover Dam Bypass Bridge </Td> </Tr> <Tr> <Th> Maintained by </Th> <Td> Arizona Department of Transportation (ADOT) Nevada Department of Transportation (NDOT) </Td> </Tr> <Tr> <Th_colspan="2"> Characteristics </Th> </Tr> <Tr> <Th> Design </Th> <Td> concrete - steel composite arch bridge </Td> </Tr> <Tr> <Th> Total length </Th> <Td> 1,900 feet (579 m) </Td> </Tr> <Tr> <Th> Longest span </Th> <Td> 1,060 ft (323 m) </Td> </Tr> <Tr> <Th> Clearance below </Th> <Td> 900 ft (270 m) </Td> </Tr> <Tr> <Th_colspan="2"> History </Th> </Tr> <Tr> <Th> Designer </Th> <Td> Bridge Designer T.Y. Lin International Design Manager HDR, Inc . </Td> </Tr> <Tr> <Th> Construction start </Th> <Td> February 14, 2005 </Td> </Tr> <Tr> <Th> Construction end </Th> <Td> October 14, 2010 </Td> </Tr> <Tr> <Th> Construction cost </Th> <Td> $240 million </Td> </Tr> <Tr> <Th> Opened </Th> <Td> October 16, 2010 (to pedestrians); October 19, 2010 (regular traffic) </Td> </Tr> <Tr> <Th_colspan="2"> Statistics </Th> </Tr> <Tr> <Th> Daily traffic </Th> <Td> 15,000 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Mike O'Callaghan--Pat Tillman Memorial Bridge </Th> </Tr>

When was the bridge at hoover dam built
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