US Bridges

Ibex Ave over Little Rock River

Fair

Lyon County, Iowa · 098451202 · Structure no. 000000000228531

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
278 ft
4 main spans
Daily traffic
46
2022 count
Owner
County
County Highway Agency

About this bridge

Ibex Ave over Little Rock River is a steel continuous stringer/multi-beam or girder carrying Ibex Ave over Little Rock River in Lyon County, Iowa. It was built in 1978, so it is 47 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 46 vehicles a day, projected to reach 46 by 2043. The structure is 278 ft (84.7 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIbex Ave
CrossesLittle Rock River
Location098451202
RouteCounty Highway 0
CountyLyon County
StateIowa
Coordinates43.32036, -96.11707
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 rating50.3 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length278 ft (84.7 m)
Longest span78 ft (23.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2022)
Projected traffic46 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ibex Ave over Little Rock River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Ibex Ave over Little Rock 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 July 2023.

How much traffic does Ibex Ave over Little Rock River carry?

About 46 vehicles per day (2022 count).

How long is Ibex Ave over Little Rock River?

The structure is 278 ft (84.7 m) long with a longest span of 78 ft (23.8 m) and a deck 32 ft wide.

Who owns Ibex Ave over Little Rock River?

It is owned by the County Highway Agency.