US Bridges

FM 230 Ave over Small Stream

Fair

Delaware County, Iowa · 087040802 · Structure no. 000000000139500

Built
1963
62 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
383
2022 count
Owner
County
County Highway Agency

About this bridge

FM 230 Ave over Small Stream is a concrete culvert carrying FM 230 Ave over Small Stream in Delaware County, Iowa. It was built in 1963, so it is 62 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 383 vehicles a day, roughly 16% of them trucks, projected to reach 383 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFM 230 Ave
CrossesSmall Stream
Location087040802
RouteCounty Highway 0
CountyDelaware County
StateIowa
Coordinates42.36181, -91.34472
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating80.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic383 (2022)
Projected traffic383 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 230 Ave over Small Stream built?

It was built in 1963, making it 62 years old in 2025.

What condition is FM 230 Ave over Small Stream 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 March 2023.

How much traffic does FM 230 Ave over Small Stream carry?

About 383 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is FM 230 Ave over Small Stream?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m).

Who owns FM 230 Ave over Small Stream?

It is owned by the County Highway Agency.