US Bridges

Main ST over Wonder Creek

Fair

Winneshiek County, Iowa · 000000000 · Structure no. 000000000011000

Built
1956
69 years old, rebuilt 1986
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
107 ft
3 main spans
Daily traffic
360
2022 count
Owner
County
County Highway Agency

About this bridge

Main ST over Wonder Creek is a prestressed concrete stringer/multi-beam or girder carrying Main ST over Wonder Creek in Winneshiek County, Iowa. It was built in 1956 and reconstructed in 1986, so it is 69 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 360 vehicles a day, roughly 13% of them trucks, projected to reach 360 by 2043. The structure is 107 ft (32.6 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesMain ST
CrossesWonder Creek
Location000000000
RouteCity Street 0
CountyWinneshiek County
StateIowa
Coordinates43.20016, -91.951
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.3 US tons
Inventory rating28.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length107 ft (32.6 m)
Longest span44 ft (13.4 m)
Deck width33 ft (10 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2022)
Projected traffic360 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Wonder Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is Main ST over Wonder Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Main ST over Wonder Creek carry?

About 360 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Main ST over Wonder Creek?

The structure is 107 ft (32.6 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns Main ST over Wonder Creek?

It is owned by the County Highway Agency.