US Bridges

FM over Howerdon Creek

PoorPosted for load

Madison County, Iowa · 076283002 · Structure no. 000000000234220

Built
1954
71 years old, rebuilt 2001
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
122 ft
3 main spans
Daily traffic
477
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Howerdon Creek is a steel continuous stringer/multi-beam or girder carrying FM over Howerdon Creek in Madison County, Iowa. It was built in 1954 and reconstructed in 2001, so it is 71 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 3 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. Its operating status is: posted for load restriction.

It carries about 477 vehicles a day, roughly 9% of them trucks, projected to reach 477 by 2044. The structure is 122 ft (37.2 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM
CrossesHowerdon Creek
Location076283002
RouteCounty Highway 0
StateIowa
Coordinates41.35209, -94.12702
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating29.7 US tons
Inventory rating19.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length122 ft (37.2 m)
Longest span47 ft (14.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic477 (2022)
Projected traffic477 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$1.5 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Howerdon Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2001.

What condition is FM over Howerdon Creek 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 August 2024.

How much traffic does FM over Howerdon Creek carry?

About 477 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Howerdon Creek?

The structure is 122 ft (37.2 m) long with a longest span of 47 ft (14.3 m) and a deck 24 ft wide.

Who owns FM over Howerdon Creek?

It is owned by the County Highway Agency.