US Bridges

FM over Drainage

Fair

Pottawattamie County, Iowa · 074402003 · Structure no. 000000000284160

Built
1961
64 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
417
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Drainage is a concrete continuous culvert carrying FM over Drainage in Pottawattamie County, Iowa. It was built in 1961, so it is 64 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 6 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 417 vehicles a day, roughly 15% of them trucks, projected to reach 417 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFM
CrossesDrainage
Location074402003
RouteCounty Highway 0
StateIowa
Coordinates41.19653, -95.46244
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length30 ft (9.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic417 (2022)
Projected traffic417 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage built?

It was built in 1961, making it 64 years old in 2025.

What condition is FM over Drainage 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 2024.

How much traffic does FM over Drainage carry?

About 417 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is FM over Drainage?

The structure is 30 ft (9.1 m) long with a longest span of 10 ft (3 m).

Who owns FM over Drainage?

It is owned by the County Highway Agency.