US Bridges

O Avenue over East Tarkio River

Fair

Page County, Iowa · 070371004 · Structure no. 000000000267921

Built
1993
32 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
668
2022 count
Owner
County
County Highway Agency

About this bridge

O Avenue over East Tarkio River is a prestressed concrete stringer/multi-beam or girder carrying O Avenue over East Tarkio River in Page County, Iowa. It was built in 1993, so it is 32 years old, younger 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 668 vehicles a day, roughly 8% of them trucks, projected to reach 668 by 2042. The structure is 155 ft (47.2 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesO Avenue
CrossesEast Tarkio River
Location070371004
RouteCounty Highway 0
CountyPage County
StateIowa
Coordinates40.8818, -95.09964
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span55 ft (16.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic668 (2022)
Projected traffic668 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 O Avenue over East Tarkio River built?

It was built in 1993, making it 32 years old in 2025.

What condition is O Avenue over East Tarkio 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 November 2022.

How much traffic does O Avenue over East Tarkio River carry?

About 668 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is O Avenue over East Tarkio River?

The structure is 155 ft (47.2 m) long with a longest span of 55 ft (16.8 m) and a deck 33 ft wide.

Who owns O Avenue over East Tarkio River?

It is owned by the County Highway Agency.