4 votes

160th Street timber bridge


North side of bridge

Photo taken June 2010 by Jay Rush.


BH Photo #168548


Timber stringer bridge over Prairie Creek on 160th Street
Kossuth County, Iowa
Open to traffic
Built 1986
Timber stringer
Length of largest span: 23.0 ft.
Total length: 61.0 ft.
Deck width: 22.0 ft.
Approximate latitude, longitude
+42.99450, -94.05338   (decimal degrees)
42°59'40" N, 94°03'12" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/414132/4760741 (zone/easting/northing)
Quadrangle map:
Lu Verne
Land survey
Twp. 94 N., R. 27 W., Sec. 5
Average daily traffic (as of 2015)
Inventory numbers
IA 213491 (Iowa bridge number)
BH 45549 (Bridgehunter.com ID)
Inspection report (as of May 2017)
Overall condition: Fair
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 84.9 (out of 100)
View more at BridgeReports.com


Beam (17,369)
Built 1986 (81)
Built during 1980s (774)
Iowa (6,865)
Kossuth County, Iowa (28)
Modern (2,507)
Open (41,427)
Owned by county (21,997)
Span length under 25 feet (7,166)
Timber stringer (4,471)
Total length 50-75 feet (9,885)

Update Log 

  • June 26, 2010: Added by Jay Rush


160th Street timber bridge
Posted September 6, 2011, by Jason Smith (JDSmith77 [at] gmx [dot] net)

In Minnesota and Iowa respectively, it's all hit and miss. Some counties resort to wooden stringers as a way for the structure to conform to the surroundings and for reasons that the road is sparsely travelled. That is especially common in the northern half of Minnesota where wood is abundant and the area is heavily wooded and populated with lakes. Other counties prefer concrete as a cost-cutting measure without regard to the conformity with the surroundings, mainly because they are looking for a bridge that is functional and not based on aesthetics. This is especially noticeable in counties that are cash-strapped and are looking at ways to cut costs.

160th Street timber bridge
Posted September 6, 2011, by Nathan Holth (form3 [at] historicbridges [dot] org)

In Michigan we have a number of counties that still build timber stringer/slab bridges even today.