US Bridges

FM over Branch Salt Creek

Fair

Tama County, Iowa · 085132002 · Structure no. 000000000319531

Built
1998
27 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
30 ft
1 main span
Daily traffic
727
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Branch Salt Creek is a concrete stringer/multi-beam or girder carrying FM over Branch 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 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 727 vehicles a day, roughly 12% of them trucks, projected to reach 727 by 2044. The structure is 30 ft (9.1 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesFM
CrossesBranch Salt Creek
Location085132002
RouteCounty Highway 0
StateIowa
Coordinates42.15899, -92.39686
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.3 US tons
Inventory rating41 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic727 (2022)
Projected traffic727 by 2044
Trucks12%
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 Branch Salt Creek built?

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

What condition is FM over Branch Salt 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 September 2024.

How much traffic does FM over Branch Salt Creek carry?

About 727 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is FM over Branch Salt Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 31 ft wide.

Who owns FM over Branch Salt Creek?

It is owned by the County Highway Agency.