US Bridges

FM Addison Ave over Wapsipinicon River

Fair

Howard County, Iowa · 099141802 · Structure no. 000000000183390

Built
1968
57 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
285
2022 count
Owner
County
County Highway Agency

About this bridge

FM Addison Ave over Wapsipinicon River is a concrete slab carrying FM Addison Ave over Wapsipinicon River in Howard County, Iowa. It was built in 1968, so it is 57 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 285 vehicles a day, roughly 18% of them trucks, projected to reach 285 by 2043. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM Addison Ave
CrossesWapsipinicon River
Location099141802
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.39078, -92.55409
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
Deck7 GoodSome minor problems.
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 protection8 Very GoodNo problems noted.
Last inspectionApril 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.4 US tons
Inventory rating31.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic285 (2022)
Projected traffic285 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM Addison Ave over Wapsipinicon River built?

It was built in 1968, making it 57 years old in 2025.

What condition is FM Addison Ave over Wapsipinicon 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 April 2023.

How much traffic does FM Addison Ave over Wapsipinicon River carry?

About 285 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is FM Addison Ave over Wapsipinicon River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns FM Addison Ave over Wapsipinicon River?

It is owned by the County Highway Agency.