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St. Marks Road Bridge

Photos 

Photo taken by Daniel McFarland

Enlarge

BH Photo #135766

Map 

Facts 

Overview
Pony truss bridge over Broad Run on St. Marks Road
Location
Frederick County, Maryland
Status
Open to traffic
Design
Pin-connected, 5-panel Pratt pony truss
Dimensions
Length of largest span: 71.9 ft.
Total length: 73.2 ft.
Deck width: 10.5 ft.
Approximate latitude, longitude
+39.36675, -77.58637   (decimal degrees)
39°22'00" N, 77°35'11" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/277187/4360667 (zone/easting/northing)
Quadrangle map:
Point of Rocks
Inventory number
BH 19686 (Bridgehunter.com ID)
Inspection (as of 09/2015)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 47.2 (out of 100)
Average daily traffic (as of 2007)
216

Categories 

Frederick County, Maryland (81)
Maryland (652)
One-lane traffic (7,421)
Open (36,545)
Owned by county (18,854)
Pin-connected (3,209)
Pony truss (15,049)
Pratt pony truss (3,180)
Pratt truss (8,018)
Span length 50-75 feet (8,892)
Total length 50-75 feet (8,430)
Truss (29,442)

Update Log 

  • June 2, 2017: Updated by Christopher Finigan: Added category "Pin-connected"
  • March 22, 2009: New photos from Daniel McFarland

Sources 

  • Daniel McFarland