US Bridges

123rd ST over Turkey River

Fair

Winneshiek County, Iowa · 096092103 · Structure no. 000000000346360

Built
1936
89 years old
Condition
Fair
inspected March 2024
Type
Truss - Thru
Steel
Length
185 ft
2 main spans
Daily traffic
118
2022 count
Owner
County
County Highway Agency

About this bridge

123rd ST over Turkey River is a steel truss - thru carrying 123rd ST over Turkey River in Winneshiek County, Iowa. It was built in 1936, so it is 89 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 5 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 118 vehicles a day, projected to reach 118 by 2044. The structure is 185 ft (56.4 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries123rd ST
CrossesTurkey River
Location096092103
RouteCounty Highway 0
CountyWinneshiek County
StateIowa
Coordinates43.11325, -91.9054
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating45.4 US tons
Inventory rating30.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length185 ft (56.4 m)
Longest span90 ft (27.4 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2022)
Projected traffic118 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 123rd ST over Turkey River built?

It was built in 1936, making it 89 years old in 2025.

What condition is 123rd ST over Turkey River 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 March 2024.

How much traffic does 123rd ST over Turkey River carry?

About 118 vehicles per day (2022 count).

How long is 123rd ST over Turkey River?

The structure is 185 ft (56.4 m) long with a longest span of 90 ft (27.4 m) and a deck 16 ft wide.

Who owns 123rd ST over Turkey River?

It is owned by the County Highway Agency.