US Bridges

FM over North Skunk River

Good

Keokuk County, Iowa · 075122104 · Structure no. 000000000362770

Built
1986
39 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
555 ft
6 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

FM over North Skunk River is a prestressed concrete stringer/multi-beam or girder carrying FM over North Skunk River in Keokuk County, Iowa. It was built in 1986, so it is 39 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 45 vehicles a day, projected to reach 45 by 2044. The structure is 555 ft (169.2 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesFM
CrossesNorth Skunk River
Location075122104
RouteCounty Highway 0
StateIowa
Coordinates41.28305, -92.25745
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length555 ft (169.2 m)
Longest span91 ft (27.7 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 North Skunk River built?

It was built in 1986, making it 39 years old in 2025.

What condition is FM over North Skunk River 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 March 2024.

How much traffic does FM over North Skunk River carry?

About 45 vehicles per day (2022 count).

How long is FM over North Skunk River?

The structure is 555 ft (169.2 m) long with a longest span of 91 ft (27.7 m) and a deck 30 ft wide.

Who owns FM over North Skunk River?

It is owned by the County Highway Agency.