US Bridges

FM & 110th ST over Willow River

FairPosted for load

Harrison County, Iowa · 081421601 · Structure no. 000000000179400

Built
1918
107 years old
Condition
Fair
inspected January 2024
Type
Truss - Thru
Steel
Length
167 ft
1 main span
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

FM & 110th ST over Willow River is a steel truss - thru carrying FM & 110th ST over Willow River in Harrison County, Iowa. It was built in 1918, so it is 107 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. Its operating status is: posted for load restriction.

It carries about 29 vehicles a day, projected to reach 29 by 2042. The structure is 167 ft (50.9 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM & 110th ST
CrossesWillow River
Location081421601
RouteCounty Highway 0
CountyHarrison County
StateIowa
Coordinates41.83477, -95.73687
Functional classRural Minor 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment6: Equal to present minimum criteria
Operating rating25.8 US tons
Inventory rating15.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length167 ft (50.9 m)
Longest span162 ft (49.4 m)
Deck width26 ft (7.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 by 2042
Trucks0%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM & 110th ST over Willow River built?

It was built in 1918, making it 107 years old in 2025.

What condition is FM & 110th ST over Willow River 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 January 2024.

How much traffic does FM & 110th ST over Willow River carry?

About 29 vehicles per day (2022 count).

How long is FM & 110th ST over Willow River?

The structure is 167 ft (50.9 m) long with a longest span of 162 ft (49.4 m) and a deck 26 ft wide.

Who owns FM & 110th ST over Willow River?

It is owned by the County Highway Agency.