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Grassmere Road Bridge

Photos 

MI-85-1

Photo taken by Dietrich Floeter, June 1995, for HAER

View photos at Library of Congress

BH Photo #121031

Map 

Facts 

Overview
Lost Pratt pony truss bridge over Pinnebog River on Grassmere Road near Caseville
Location
Huron County, Michigan
Status
Replaced by new bridge
History
Built 1910; Modified 1959; Replaced 1996
Design
3 span, steel pinned connection Pratt pony truss.

"With a total bridge length of 21.9m (72'), it is an unusual for a Pratt Pony Truss bridge to be this long.

"The bridge replacement became more critical after the 1991 bridge inspection indicated the 5 ton load limit. To mitigate the adverse effect, the State Historic Preservation Office stipulated documentation of the historic bridge. This documentation was undertaken to fulfill the first stipulation of the Memorandum of Agreement."

R.S. Scott Associates
405 River Street
Alpena, MI

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Dimensions
Length of largest span: 49.0 ft.
Total length: 72.5 ft.
Deck width: 15.8 ft.
Approximate latitude, longitude
+43.94874, -83.12664   (decimal degrees)
43°56'55" N, 83°07'36" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/329350/4868377 (zone/easting/northing)
Quadrangle map:
Rush Lake
Inventory numbers
MINBI 32311H00017B010 (Michigan bridge number on the National Bridge Inventory 2010 and before)
BH 37169 (Bridgehunter.com ID)

Update Log 

  • August 13, 2008: Added by J.R. Manning

Sources 

  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • HAER MI-85 - Grassmere Road Bridge, Spanning Pinnebog River, Caseville vicinity, Huron County, MI