Old Pass Manchac Bridge (1957)
Photo taken in October 2007
BH Photo #255026
Built in 1957 as part of the complete reconstruction of US 51 between Frenier and Ponchatoula. Replaced the original 1926 Pass Manchac draw bridge immediately to the east, which remained in use as a fishing pier until it burned in 1969. Served as US 51 until being bypassed by the four-lane I-55 span (co-signed as US 51) in 1979. 1976 rehabilitation followed a tugboat hit that occurred during (but was unrelated to) the construction of I-55.
- Steel stringer bridge over Pass Manchac on Old US 51
- Tangipahoa Parish, Louisiana, and St. John the Baptist Parish, Louisiana
- Open to traffic
- Built 1957; rehabilitated 1976
- Steel stringer
Length of largest span: 285.1 ft.
Total length: 3,012.3 ft. (0.6 mi.)
Deck width: 27.9 ft.
- Approximate latitude, longitude
- +30.28553, -90.40111 (decimal degrees)
30°17'08" N, 90°24'04" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 15/749978/3353285 (zone/easting/northing)
- Quadrangle map:
- Average daily traffic (as of 2016)
- Inventory number
- BH 56421 (Bridgehunter.com ID)
- Inspection report (as of December 2018)
- Overall condition: Poor
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 37.3 (out of 100)
View more at BridgeReports.com
- February 29, 2020: Updated by Roger Collins: Moved long text from history field to description box and expanded w/add'l info.
- September 28, 2013: New photos from M. D. Caillet
- May 31, 2013: Updated by M. D. Caillet: Added categories "US 51", "Bypassed"