US Bridges

FM over Four Mile Creek

Good

Union County, Iowa · 072281104 · Structure no. 000000000325362

Built
2009
16 years old
Condition
Good
inspected October 2023
Type
Slab
Steel Continuous
Length
65 ft
2 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Four Mile Creek is a steel continuous slab carrying FM over Four Mile Creek in Union County, Iowa. It was built in 2009, so it is 16 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 65 ft (19.8 m) long and 25 ft wide.

CarriesFM
CrossesFour Mile Creek
Location072281104
RouteCounty Highway 0
StateIowa
Coordinates41.05393, -94.03479
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.1 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span32 ft (9.8 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Four Mile Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is FM over Four Mile Creek 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 October 2023.

How much traffic does FM over Four Mile Creek carry?

About 26 vehicles per day (2022 count).

How long is FM over Four Mile Creek?

The structure is 65 ft (19.8 m) long with a longest span of 32 ft (9.8 m) and a deck 25 ft wide.

Who owns FM over Four Mile Creek?

It is owned by the County Highway Agency.