Status: Closed to all traffic
Location: 44.708994,-88.009030
Carries Grosse Road over Little Suamico River
Design: truss/through/pratt
Design Details: Through truss
Total Length: 92.9 Feet
Span Length: 89.9 Feet
Overview: Through truss bridge over Little Suamico River on Grosse Road
History: Built 1909
Built: 1909
Location: Oconto County
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194932
Looking north
What a hidden jewel! The main county highway bypasses the bridge about a quarter mile to the west.
Photo taken by Robert Thompson in March 2011
194933
Looking south
Since the neighborhood is so nice and quiet, I doubt the people living on the road will be asking to have the bridge replaced, which is good news for the future of this bridge.
Photo taken by Robert Thompson in March 2011
194934
Barrel shot, looking south
Photo taken by Robert Thompson in March 2011
194935
Structural detail
Photo taken by Robert Thompson in March 2011
194936
Ouch...
I don't know what caused this structural damage.
Photo taken by Robert Thompson in March 2011
194937
Underside structure
At some point, the original deck was replaced with modern concrete. And not recently, because the current road surface above is asphalt.
Photo taken by Robert Thompson in March 2011
Status: Demolished and replaced.
Location: 44.888505,-88.009999
Carries WI 22 over Little River
Design: truss
Design Details: Truss
Total Length: 102.7 Feet
Span Length: 102.7 Feet
Overview: Truss bridge over Little River on WI 22
History: Built 1932
Built: 1932
Location: Oconto County
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Status: Replaced by a new bridge
Location: 44.881667,-88.246944
Carries WI 32 over Oconto River
Design: truss/pony/warren
Design Details: 2 span Continuous Warren pony truss with riveted connections.
Total Length: 191.9 Feet
Span Length: 92.9 Feet
Overview: Lost Continuous pony truss bridge over Oconto River on WI 32
History: Built 1938; rehabilitated 1983; replaced 2014
Built: 1938
Location: Oconto County
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195160
Barrel Shot, looking north
Notice the 30 degree skew in the span
Photo taken by Robert Thompson in March 2011
195161
West side of span
Looking north
Photo taken by Robert Thompson in March 2011
195162
Southwest footing
Photo taken by Robert Thompson in March 2011
195163
Fishes' view, looking north
Not clear in the photo, but the concrete above is fairly recent. It appears as though it has been re-decked recently. But there is quite a bit of rust on the steel on the upper part of the bridge.
Photo taken by Robert Thompson in March 2011
195164
30 degree skew is very apparent
South end of span
Photo taken by Robert Thompson in March 2011
195165
Corrosion
Pitting, not just rust. This is right in the splash zone, where it gets sprayed with water and road salt.
Photo taken by Robert Thompson in March 2011
195166
Northwest corner of north span
Some corrosion visible.
Photo taken by Robert Thompson in March 2011
195167
Looking southeast
It needs a good sandblasting and repaint.
Photo taken by Robert Thompson in March 2011
195168
View from the west.
Not trespassing. I'm on public property - a wayside owned by the Wisconsin DOT
Photo taken by Robert Thompson in March 2011
Status: Open to traffic
Location: 45.315028,-88.415111
Carries Smyth Road over North Branch Oconto River
Design: truss/through/pratt
Design Details: Pratt through truss
Total Length: 92.9 Feet
Span Length: 89.9 Feet
Overview: Through truss bridge over North Branch Oconto River on Smyth Road
History: Built 1928
Built: 1928
Location: Oconto County
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217408
Looking Southeast
Photo taken by Robert Thompson in October 2011
217409
Looking West
Photo taken by Robert Thompson in October 2011
217410
Looking Northwest
Photo taken by Robert Thompson in October 2011
217411
Railing detail
Original riveted railing; upper section is angle/flatbar lattice, lower section is rolled channel and angle.
Photo taken by Robert Thompson in October 2011
217412
Upper Chord and cross-brace details
Photo taken by Robert Thompson
217413
Rocker bearing at east end of bridge
Photo taken by Robert Thompson
217414
Looking east
Photo taken by Robert Thompson
Status: Open to traffic
Location: 44.882530,-87.882419
Carries Canadian National Railway over Oconto River
Design: girder/pony/plate
Design Details: While the rollers and gears are still in place, the mechanism is so rusted it will never move again.
Total Length: 210.0 Feet
Span Length: 60.0 Feet
Overview: Pony/through plate girder bridge over Oconto River on Canadian National Railway
History: Built 1903, Approach Added 1911
Built: 1911
Location: Oconto County
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162367
CN RR Oconto Swing Bridge 1
Looking downriver (east)
Photo taken by Robert Thompson
162368
CN RR Oconto Swing Bridge 2
From the north bank
Photo taken by Robert Thompson in April 2010
162369
CN RR Oconto Swing Bridge 3
From the south bank
Photo taken by Robert Thompson in April 2010
162370
CN RR Oconto Swing Bridge 4
Swing mechanism and rollers
Photo taken by Robert Thompson in April 2010
162371
CN RR Oconto Swing Bridge 5
Looking north from the south bank
Photo taken by Robert Thompson in April 2010
261848
Photo taken by Douglas Butler
351047
Oconto Swing Bridge
Center Pier
Photo taken by John Marvig in March 2016
351048
Oconto Swing Bridge
Looking South
Photo taken by John Marvig in March 2016
351049
Oconto Swing Bridge
North Pier
Photo taken by John Marvig in March 2016
351050
Oconto Swing Bridge
North Approach
Photo taken by John Marvig in March 2016
351051
Oconto Swing Bridge
South Pier
Photo taken by John Marvig in March 2016
351052
Oconto Swing Bridge
South Approach
Photo taken by John Marvig in March 2016
351053
Oconto Swing Bridge
South Abutment
Photo taken by John Marvig in March 2016
351054
Oconto Swing Bridge
Looking South
Photo taken by John Marvig in March 2016
351055
Oconto Swing Bridge
Roller Bearings
Photo taken by John Marvig in March 2016
351056
Oconto Swing Bridge
Looking South
Photo taken by John Marvig in March 2016
351057
Oconto Swing Bridge
Gears
Photo taken by John Marvig in March 2016
351058
Oconto Swing Bridge
Swing Details
Photo taken by John Marvig in March 2016
351059
Oconto Swing Bridge
Plate
Photo taken by John Marvig in March 2016
351060
Oconto Swing Bridge
Looking North
Photo taken by John Marvig in March 2016
351061
Oconto Swing Bridge
Overview
Photo taken by John Marvig in March 2016
351062
Oconto Swing Bridge
Looking North
Photo taken by John Marvig in March 2016
351063
Oconto Swing Bridge
Swing Gears
Photo taken by John Marvig in March 2016
351064
Oconto Swing Bridge
Overview
Photo taken by John Marvig in March 2016
351065
Oconto Swing Bridge
South End
Photo taken by John Marvig in March 2016
351066
Oconto Swing Bridge
Looking Towards Bridge
Photo taken by John Marvig in March 2016
Status: Moved over to sit parallel to replacement bridge.
Good. New abutments were built just downstream of the original location, and the bridge was moved over.
Location: 44.998692,-88.380237
Carries State Highway 32 over Oconto River
Design: truss/through/parker
Design Details: Seeing that the vertical columns are rolled I-beams rather than paired channels riveted together, I'd guess that it was built in the 1940's or 1950's. Design details are similar to other bridges I've seen from Wausau Bridge & Iron.
Total Length: 145.0 Feet
Span Length: 140.4 Feet
Overview: Parker through truss bridge over Oconto River on State Highway 32
History: Built 1936. Relocated ca. 1999.
Built: 1936
Location: Oconto County
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178461
Looking Northwest
This is the old bridge; the new bridge is hidden behind it.
Photo taken by Robert Thompson
178462
Looking NNW
A nice profile shot.
Photo taken by Robert Thompson
178463
Looking West
As you can see by the trees ahead, the bridge has been moved downstream from the highway to allow for the new bridge to be built. There were no curves in the road when it was in use.
Photo taken by Robert Thompson
178464
Collision damage.
This is the SE corner of the bridge, showing the effects of a collision with something.
Photo taken by Robert Thompson
178465
Mid span
Photo taken by Robert Thompson
178466
The new bridge.
Such stunning beauty. (sarcasm)
Photo taken by Robert Thompson
Status: Removed and replaced with a mail order truss
Location: 44.858423,-88.049882
Carries over Oconto River
Design: truss/through/pratt
Design Details: Pin-connected Pratt through truss.
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Pratt through truss bridge over Oconto River
History: Built ca. 1920
Built: ca. 1920
Location: Oconto County
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Status: Open to pedestrians
Location: 45.181216,-88.471424
Carries over Unnamed artificial fish pond
Design: truss/pony/warren/verticals
Design Details: This is a riveted Pony Truss bridge that was disassembled by drilling out rivets and moved. At reassembly, the removed rivets were replaced with stove bolts and nuts.
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Bridge over Unnamed artificial fish pond
History:
Built:
Location: Oconto County
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180330
Looking west
The bridge was moved to this location, to span a little artificial pond.
Photo taken by Robert Thompson
180331
Looking North
The pond is stocked with fish for kids to catch from the bridge
Photo taken by Robert Thompson
180332
Barrel shot
Photo taken by Robert Thompson
180333
Corner detail
Upper chords of the truss were heated and bent, versus made from separate pieces.
Photo taken by Robert Thompson
180334
Mid-span
The bolts that replaced the original rivets are visible.
Photo taken by Robert Thompson
180335
Looking southeast
Photo taken by Robert Thompson
Status: Open to traffic
Location: 44.709188,-88.009534
Carries Canadian National Railroad over Little Suamico River
Design: girder/pony/plate
Design Details: Standard riveted steel construction; bridge piers are local dolomite stone.
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Pony/through plate girder bridge over Little Suamico River on Canadian Pacific Railroad
History: Replaced an earlier bridge of at least partial timber construction. The pilings remain under the current bridge.
Built: 1929
Location: Oconto County
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194942
Taken from the Grosse Road bridge
I couldn't help but notice this fine specimen just to the west of the Grosse Road bridge...
Photo taken by Robert Thompson in March 2011
194943
Looking northwest
consisting of two main Pony spans, of riveted construction, and a short deck girder span at the north end.
Photo taken by Robert Thompson in March 2011
194944
Underside structure
One advantage to northern winters: stiff water is easy to walk on.
Photo taken by Robert Thompson in March 2011
194945
Builder's Plate
American Bridge, 1929
Photo taken by Robert Thompson in March 2011
194946
Remains of previous bridge
It appears they just left the remains of the original wooden trestle in the ground when they built the bridge 82 years ago.
Photo taken by Robert Thompson in March 2011
Status: Open to traffic
Location: 45.336840,-88.454910
Carries Riverside Road over North Branch of Oconto River
Design: girder/deck/concrete
Design Details:
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Bridge over North Branch of Oconto River on Riverside Road
History:
Built:
Location: Oconto County
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196173
Barrel shot, looking west
"One Lane Bridge Ahead", the sign behind me warns.
Photo taken by Robert Thompson in March 2011
196174
Looking west.
Photo taken by Robert Thompson in March 2011
196175
Looking north
Photo taken by Robert Thompson in March 2011
196176
Looking east
Photo taken by Robert Thompson in March 2011
196177
Looking east
Photo taken by Robert Thompson in March 2011
Status: Open to traffic
Location: 45.304432,-88.552328
Carries E. Chain Lake Road over Unnamed creek
Design: girder/deck/concrete
Design Details: Concrete deck girder
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Concrete deck girder bridge over Unnamed creek on E. Chain Lake Road
History:
Built:
Location: Oconto County
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241413
Looking east
Photo taken by Robert Thompson in October 2012
241414
Photo taken by Robert Thompson in October 2012
241415
North side of bridge
Photo taken by Robert Thompson in October 2012
241416
Looking west
Photo taken by Robert Thompson in October 2012
Status: Open to traffic
Location: 45.307088,-88.551469
Carries Bike/ATV/Snowmobile trail (on RR grade) over McCaslin Brook
Design: girder/deck
Design Details: Deck girder
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Deck girder bridge over McCaslin Brook on Bike/ATV/Snowmobile trail (on RR grade)
History:
Built:
Location: Oconto County
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349388
Looking NE
Photo taken by Robert Thompson in February 2016
349389
Closeup of timber span
Photo taken by Robert Thompson in February 2016
349390
Looking SE at timber piers
Photo taken by Robert Thompson in February 2016
349391
Looking W at plate girder span
Photo taken by Robert Thompson in February 2016
349392
Looking N at plate girder span
Photo taken by Robert Thompson in February 2016
349393
Looking NE along creek
Photo taken by Robert Thompson in February 2016
Status: Open to pedestrians only
Location: 44.871290,-88.275394
Carries Unnamed Rail-Trail over Oconto River
Design: girder/deck/plate
Design Details: Deck plate girder
Total Length: 540.0 Feet
Span Length: 100.0 Feet
Overview: Deck plate girder bridge over Oconto River on Unnamed Rail-Trail
History: Built 1917
Built: 1917
Location: Oconto County
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497946
Photo taken by Kristofer Olson in November 2020
497947
Photo taken by Kristofer Olson in November 2020
Status: Derelict/abandoned
Location: 45.021853,-88.416278
Carries State Highway 32 over South Branch Oconto River
Design: girder/pony/concrete
Design Details: Concrete through girder
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Abandoned concrete pony/through girder bridge over South Branch Oconto River on State Highway 32
History:
Built:
Location: Oconto County
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Status: Derelict/abandoned
Location: 45.127232,-88.420703
Carries State Highway 32 over Oconto River
Design: girder/pony/concrete
Design Details: Concrete through girder
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Abandoned concrete pony/through girder bridge over Oconto River on State Highway 32
History:
Built:
Location: Oconto County
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Status: Open to traffic
Location: 45.336867,-88.454942
Carries Riverside Road over North Branch Oconto River
Design: slab
Design Details: Slab
Total Length: 60.7 Feet
Span Length: 28.9 Feet
Overview: Slab bridge over North Branch Oconto River on Riverside Road
History: Built 1913
Built: 1913
Location: Oconto County
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Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S - Dismantled and/or in storage. L - Severe loss of historic integrity due to alteration.
