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Knaggs Bridge


View Of Bridge, Looking East From Cole Road

Photo taken by Dietrich Floeter, November 1987, for HAER

View photos at Library of Congress

BH Photo #120500



Lost Pratt through truss bridge over Shiawassee River on Cole Road near Bancroft
Shiawassee County, Michigan
Replaced by new bridge
Built 1893 by the King Bridge Co.; rehabilitated 1943; replaced 1988
- King Bridge Co. of Cleveland, Ohio
"The Knaggs Bridge (Cole Road Bridge) is the second oldest known surviving example of the nationally famous King Bridge Company's work in Michigan, on which they have data. The bridge company was the second most prolific metal truss bridge builder in Michigan in the 19th century. The existing structure is a single span, through Pratt truss, having eight panels at 16 feet, 3/4 inch, for a total span length of 128 feet 6 inches, center to center of pines. A determination of eligibility has been received from the National Register."

Gerald H. Streichert, P.E., Shiawasso County Road Commission, ca. 1987
Span length: 128.6 ft.
Total length: 128.6 ft.
Deck width: 16.5 ft.
Vertical clearance above deck: 16.0 ft.
Also called
Cole Road Bridge
Approximate latitude, longitude
+42.86111, -84.03167   (decimal degrees)
42°51'40" N, 84°01'54" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/742496/4749666 (zone/easting/northing)
Quadrangle map:
Corunna SE
Inventory number
BH 37121 (Bridgehunter.com ID)

Update Log 

  • August 10, 2008: Added by J.R. Manning


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • HAER MI-29 - Knaggs Bridge, Spanning Shiawassee River on Cole Road, Bancroft vicinity, Shiawassee County, MI