US Bridges

FM over Crooked Creek

Fair

Calhoun County, Iowa · 087340604 · Structure no. 000000000091530

Built
1982
43 years old, rebuilt 2019
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
1,067
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Crooked Creek is a concrete slab carrying FM over Crooked Creek in Calhoun County, Iowa. It was built in 1982 and reconstructed in 2019, so it is 43 years old, younger 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 1,067 vehicles a day, roughly 24% of them trucks, projected to reach 1,067 by 2043. The structure is 30 ft (9.1 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM
CrossesCrooked Creek
Location087340604
RouteCounty Highway 0
CountyCalhoun County
StateIowa
Coordinates42.37301, -94.85734
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
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,067 (2022)
Projected traffic1,067 by 2043
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$505,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Crooked Creek built?

It was built in 1982, making it 43 years old in 2025. It was reconstructed in 2019.

What condition is FM over Crooked 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 July 2023.

How much traffic does FM over Crooked Creek carry?

About 1,067 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is FM over Crooked Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Crooked Creek?

It is owned by the County Highway Agency.