US Bridges

FM over Shanghar Creek

Fair

Adair County, Iowa · 074322301 · Structure no. 000000000361110

Built
1977
48 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
468
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Shanghar Creek is a steel stringer/multi-beam or girder carrying FM over Shanghar Creek in Adair County, Iowa. It was built in 1977, so it is 48 years old, older 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 468 vehicles a day, roughly 19% of them trucks, projected to reach 468 by 2044. The structure is 57 ft (17.4 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesShanghar Creek
Location074322301
RouteCounty Highway 0
CountyAdair County
StateIowa
Coordinates41.20097, -94.49825
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.7 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic468 (2022)
Projected traffic468 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Shanghar Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is FM over Shanghar 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 May 2024.

How much traffic does FM over Shanghar Creek carry?

About 468 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is FM over Shanghar Creek?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns FM over Shanghar Creek?

It is owned by the County Highway Agency.