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Old Pass Manchac Bridge

Photos 

Photo taken in October 2007

Enlarge

BH Photo #255026

Map 

Facts 

Overview
Steel stringer bridge over Pass Manchac on Old US 51
Location
Manchac, Tangipahoa Parish, Louisiana, and St. John the Baptist Parish, Louisiana
Status
Open to traffic
History
This bridge was built in 1957 originally carrying US Highway 51 across Pass Manchac, replacing a timber bridge with steel draw span that opened in 1927. Rehabilitated in 1976. In 1979, Interstate 55 was completed and US-51 was co-signed with I-55.
Design
Steel stringer
Dimensions
Length of largest span: 285.1 ft.
Total length: 3,012.3 ft. (0.6 mi.)
Deck width: 27.9 ft.
Approximate latitude, longitude
+30.28556, -90.40167   (decimal degrees)
30°17'08" N, 90°24'06" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/749925/3353287 (zone/easting/northing)
Quadrangle map:
Manchac
Average daily traffic (as of 2015)
2,340
Inventory number
BH 56421 (Bridgehunter.com ID)
Inspection report (as of December 2016)
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

Update Log 

  • September 28, 2013: New photos from M. D. Caillet
  • May 31, 2013: Updated by M. D. Caillet: Added categories "US 51", "Bypassed"

Comments 

Old Pass Manchac Bridge
Posted July 21, 2019, by Geoffrey Falcon (geofffalcon [at] yahoo [dot] com)

the 1976 rehab was due to a deadly barge strike on one of the the main piers.. Repairs were completed in less than three months