US Bridges

FM over W Fork Crooked CR

Good

Washington County, Iowa · 076091904 · Structure no. 000000000337281

Built
1998
27 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
750
2022 count
Owner
County
County Highway Agency

About this bridge

FM over W Fork Crooked CR is a concrete continuous culvert carrying FM over W Fork Crooked CR in Washington County, Iowa. It was built in 1998, so it is 27 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 750 vehicles a day, roughly 17% of them trucks, projected to reach 750 by 2043. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 18 mi (29 km).

CarriesFM
CrossesW Fork Crooked CR
Location076091904
RouteCounty Highway 0
StateIowa
Coordinates41.37221, -91.94667
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2022)
Projected traffic750 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over W Fork Crooked CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is FM over W Fork Crooked CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does FM over W Fork Crooked CR carry?

About 750 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is FM over W Fork Crooked CR?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns FM over W Fork Crooked CR?

It is owned by the County Highway Agency.