US Bridges

Local over Tarkio CR

Fair

Montgomery County, Iowa · 072372101 · Structure no. 000000000255331

Built
1974
51 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Tarkio CR is a concrete continuous slab carrying Local over Tarkio CR in Montgomery County, Iowa. It was built in 1974, so it is 51 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 26 vehicles a day, projected to reach 26 by 2044. The structure is 128 ft (39 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal
CrossesTarkio CR
Location072372101
RouteCounty Highway 0
CountyMontgomery County
StateIowa
Coordinates41.03044, -95.11489
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41 US tons
Inventory rating24.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length128 ft (39 m)
Longest span48 ft (14.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Local over Tarkio CR built?

It was built in 1974, making it 51 years old in 2025.

What condition is Local over Tarkio CR 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 June 2024.

How much traffic does Local over Tarkio CR carry?

About 26 vehicles per day (2022 count).

How long is Local over Tarkio CR?

The structure is 128 ft (39 m) long with a longest span of 48 ft (14.6 m) and a deck 26 ft wide.

Who owns Local over Tarkio CR?

It is owned by the County Highway Agency.