US Bridges

FM over Salt Creek

Good

Tama County, Iowa · 083131501 · Structure no. 000000000317491

Built
1998
27 years old
Condition
Good
inspected September 2022
Type
Slab
Concrete Continuous
Length
274 ft
6 main spans
Daily traffic
226
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Salt Creek is a concrete continuous slab carrying FM over Salt Creek in Tama 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 226 vehicles a day, roughly 26% of them trucks, projected to reach 226 by 2043. The structure is 274 ft (83.5 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM
CrossesSalt Creek
Location083131501
RouteCounty Highway 0
StateIowa
Coordinates42.00723, -92.34829
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating50.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length274 ft (83.5 m)
Longest span49 ft (14.9 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic226 (2022)
Projected traffic226 by 2043
Trucks26%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Salt Creek built?

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

What condition is FM over Salt 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 September 2022.

How much traffic does FM over Salt Creek carry?

About 226 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is FM over Salt Creek?

The structure is 274 ft (83.5 m) long with a longest span of 49 ft (14.9 m) and a deck 31 ft wide.

Who owns FM over Salt Creek?

It is owned by the County Highway Agency.