US Bridges

FM 150th ST over Little Wapsipinicon

Poor

Howard County, Iowa · 098142301 · Structure no. 000000000182700

Built
1967
58 years old
Condition
Poor
inspected May 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
452
2022 count
Owner
County
County Highway Agency

About this bridge

FM 150th ST over Little Wapsipinicon is a concrete slab carrying FM 150th ST over Little Wapsipinicon in Howard County, Iowa. It was built in 1967, so it is 58 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 452 vehicles a day, roughly 22% of them trucks, projected to reach 452 by 2043. The structure is 28 ft (8.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM 150th ST
CrossesLittle Wapsipinicon
Location098142301
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.29888, -92.45609
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.1 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic452 (2022)
Projected traffic452 by 2043
Trucks22%
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 150th ST over Little Wapsipinicon built?

It was built in 1967, making it 58 years old in 2025.

What condition is FM 150th ST over Little Wapsipinicon in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does FM 150th ST over Little Wapsipinicon carry?

About 452 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is FM 150th ST over Little Wapsipinicon?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns FM 150th ST over Little Wapsipinicon?

It is owned by the County Highway Agency.