Photo taken by Matthew Lohry in July 2009
BH Photo #154175
A Technical Overview...
Written by Matthew Lohry
There are many reasons to allow this bridge to live on—first of all, V-lacing abounds, adding to the intricacy and beauty of the structure overall. V-lacing exists under the upper chord, on the vertical truss members (with the V-lacing facing the roadway rather than either end), on the sway bracing, and even the bottom chord! The truss’s built-up diagonal members are of the batten-type. The portals are of the typical A-frame design used during this era of bridge building.
Some of the photographs show square-head bolts rather than rivets for connections. Apparently, these are original, as bridge building standards (at least in Minnesota) did not yet require all-riveted connections. The steel was manufactured by Jones & Laughlin.
Another interesting feature is that the concrete deck (which is overlaid with asphalt) is of the jack-arch type. Unfortunately, the deck is deteriorating quite badly in some locations and has holes along the edges. The abutments are made of concrete and are suffering from mild deterioration. The superstructure, however, appears to be in relatively good condition and is perfectly restorable (at least in my estimation).
I hope that whoever steps up to restore this rare and beautiful piece of civil engineering history removes the horribly ugly beams that were welded across either portal to restrict the height!
Dakota County is in the process of realigning the roadway and constructing a concrete slab several hundred feet west of this historic structure. Fortunately for us historic bridge lovers, the county is allowing the historic bridge to remain in its current location for potential use as a bike and pedestrian trailway! The Dakota County Website says “possible future rehabilitation”, which tells me that no plans to rehabilitate are in place at this time. Hopefully, someone with the funds will step up and take on this vital task.
I would like to point out that as my two boys and I were under the bridge throwing rocks into the river, two cars passed over, and I would have never known if I had not seen the cloud of dust from the gravel road! Normally you would hear some sort of vibration or slight rocking, but not here! I think the bridge is sturdier than people give it credit for.
- Through truss bridge over Cannon River on CR 166 Canada Ave.
- Dakota County, Minnesota
- Bypassed by a new bridge in 2010. Bridge open to pedestrians only.
- Future prospects
- This bridge was replaced by a concrete slab bridge but remains in place as a pedestrian bridge with chances of being reincorporated in a bike trail in the near future.
- Built 1909; made obsolete by a new bridge in 2010, won SavingPlaces grant and fortified substructure: remains intact for pedestrian use
- - BACH Steel of Holt, Michigan (Abutment/Wing Wall Repair)
- Chas A. Forbes (Designer)
- Hennepin Bridge Co. of Minneapolis, Minnesota
- Workin' Bridges/NSRGA of Grinnell, Iowa
- The camelback through truss is a variation of the Parker through truss, the difference being that the upper chord of a camelback has exactly five sides, including the end posts, whereas a parker has more than five sides, giving the top of the upper chord a more curved appearance.
Length of largest span: 137.1 ft.
Total length: 143.1 ft.
Deck width: 15.4 ft.
Vertical clearance above deck: 7.7 ft.
Posted to the National Register of Historic Places on August 26, 2010
- Also called
- Cannon River Bridge
- Approximate latitude, longitude
- +44.48750, -93.12833 (decimal degrees)
44°29'15" N, 93°07'42" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 15/489795/4926028 (zone/easting/northing)
- Quadrangle map:
- Inventory numbers
- MN L3275 (Minnesota bridge number)
NRHP 10000580 (National Register of Historic Places reference number)
BH 20349 (Bridgehunter.com ID)
- Inspection (as of 01/2009)
- Deck condition rating: Critical (2 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 0.0 (out of 100)
- Average daily traffic (as of 1996)
- October 10, 2016: Updated by Christopher Finigan: Added category "Riveted"
- August 31, 2014: Updated by Julie Bowers: updated status and company
- November 25, 2013: New Street View added by J.P.
- January 16, 2013: Updated by Luke Harden: Added builder.
- August 28, 2011: Updated by Jason Smith: This bridge has been bypassed by a new bridge but is open to pedestrians only.
- September 4, 2010: Updated by James Baughn: Posted to the National Register
- April 13, 2010: Essay added by Matthew Lohry
- February 2, 2010: Updated by Matthew Lohry: Added photos, updated name and status information
- June 6, 2009: Updated by Brian McKee: Modified road name
- Brian McKee - bjmckee51 [at] yahoo [dot] com
- Matt Lohry
- Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
- J.P. - wildcatjon2000 [at] gmail [dot] com
- Julie Bowers - jbowerz1 [at] gmail [dot] com