Rating:
1 vote

Marietta Pike Overpass

Photo 

Marietta Ave Mount Joy PA

Bing Maps

BH Photo #232558

Map 

Description 

FROM THE 1996-2001 PENNSYLVANIA HISTORIC BRIDGE SURVEY: According to PADOT Dist. 8-0 environmental review records, the Marietta Avenue bridge over Amtrak has been determined eligible by PHMC. The skewed, single-span, rivet-connected Pratt pony truss bridge was built by the Pennsylvania RR. It is supported on stone abutments. PRR engineering department plans date the truss bridge to 1896. In 1960, the railroad strengthened the bridge with welded coverplates to the floorbeams, and welded attachments to the bottom chord and vertical members.

Facts 

Overview
Pony truss bridge over Amtrak on PA 772 in Mount Joy
Location
Mt. Joy, Lancaster County, Pennsylvania
Status
Open to traffic
Future prospects
Slated for demolition in 2013.
History
Built 1896; rehabilitated 1960
Railroad
- Amtrak (AMTK)
Design
Rivet-connected Pratt pony truss bridge
Dimensions
Span length: 117.1 ft.
Total length: 117.1 ft.
Deck width: 31.2 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+40.10876, -76.50184   (decimal degrees)
40°06'32" N, 76°30'07" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/372004/4440909 (zone/easting/northing)
Quadrangle map:
Columbia West
Inventory numbers
PA 36 0772 0100 2228 (Pennsylvania Bridge Management System number)
PANBI 21319 (Pennsylvania BRKEY bridge number on the 2011 NBI)
BH 31074 (Bridgehunter.com ID)
Inspection (as of 11/2007)
Deck condition rating: Serious (3 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 2.0 (out of 100)
Average daily traffic (as of 2008)
6,696

Categories 

19th Century (6,208)
Amtrak (434)
Built 1896 (235)
Built during 1890s (2,479)
Doomed (1,028)
Lancaster County, Pennsylvania (141)
Mt. Joy, Pennsylvania (1)
NR-eligible (3,978)
Open (36,831)
Owned by state (13,861)
Pennsylvania (4,386)
Pony truss (15,068)
Pratt pony truss (3,190)
Pratt truss (8,051)
Railroad (13,163)
Riveted (1,899)
Skewed (4,699)
Span length 100-125 feet (4,062)
Structurally deficient (18,538)
Total length 100-125 feet (4,686)
Truss (29,505)

Update Log 

  • December 20, 2012: Updated by Nathan Holth: This bridge is NOT gone... YET....
  • May 26, 2012: Updated by Jodi Christman: Added category "Riveted"
  • April 29, 2009: Updated by Brian McKee

Sources