Knaggs Bridge

Photos 

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View Of Bridge, Looking East From Cole Road Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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View Of Bridge, Looking West From Cole Road Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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View Of North Elevation Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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View Of South Elevation Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Top Corner, From Inside Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Road Bed Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Underside Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Vertical Support And I-Beam Connection Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Vertical Members Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of East Footing Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Of Top Corner, From Outside Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

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Detail View Showing Connection Of Side And Top Of Truss Photo taken by Dietrich Floeter, November 1987, for HAER View photos at Library of Congress

Map 

Facts 

Overview

Lost Pratt through truss bridge over Shiawassee River on Cole Road near Bancroft

Location

Shiawassee County, Michigan

Status

Replaced by new bridge

History

Built 1893 by the King Bridge Co.; rehabilitated 1943; replaced 1988

Builder

- King Bridge Co. of Cleveland, Ohio

Design

"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

Dimensions

Span length: 128.6 ft.
Total length: 128.6 ft.
Deck width: 16.5 ft.
Vertical clearance above deck: 16 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)

USGS topographic map

Coronna SE

Inventory number

BH 37121 (Bridgehunter.com ID)

Categories 

Update Log 

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

Sources 

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

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