Arroyo Simi Overhead

The Arroyo Simi Overhead is a tall viaduct in Ventura County, California, that carries State Route 118 (SR 118, Ronald Reagan Freeway) over the Arroyo Simi. At the south end of the bridge, the freeway continues as SR 23.^[7] The state routes continue as highways to the west and north respectively. The entire connector, completed in 1993, is 2.2 miles (3.5 km) long and includes seven bridges.^[2][8]

Arroyo Simi Overhead
Coordinates	34°17′13″N 118°51′53″W
Carries	4 lanes of SR 118
Crosses	Arroyo Simi
Locale	Moorpark, California
Owner	Caltrans
Maintained by	Caltrans
Characteristics
Design	Dual-span viaducts
Material	Concrete
Total length	538 metres (0.334 mi)
Width	14 metres (46 ft)
Clearance above	13 metres (43 ft)
History
Constructed by	C. C. Myers (bridges) C. A. Rasmussen (roadwork)[1]
Construction start	April 19, 1991[2]
Opened	October 15, 1993; 31 years ago (October 15, 1993)[3][4]
Replaces	Los Angeles Avenue[5][6]
Location

The railroad line between Simi Valley and Moorpark together with a local road also pass under the two main 100-foot-high (30 m) bridges that separately carry the traffic in each direction, each more than 1,400 feet (430 m) long.^[1][2] A wetlands was created as a mitigation measure for the impacts of the construction on the Arroyo Simi. Nearby Moorpark College manages and maintains the site which is used as a nature center by the environmental science program.^[9]