US Bridges

Local Road over Tarkio Creek

Good

Montgomery County, Iowa · 073372201 · Structure no. 000000000256351

Built
1996
29 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

Local Road over Tarkio Creek is a steel stringer/multi-beam or girder carrying Local Road over Tarkio Creek in Montgomery County, Iowa. It was built in 1996, so it is 29 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 34 vehicles a day, projected to reach 34 by 2044. The structure is 70 ft (21.3 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal Road
CrossesTarkio Creek
Location073372201
RouteCounty Highway 0
CountyMontgomery County
StateIowa
Coordinates41.11614, -95.08737
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating92.7 US tons
Inventory rating55.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2044
Trucks0%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local Road over Tarkio Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Local Road over Tarkio Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Local Road over Tarkio Creek carry?

About 34 vehicles per day (2022 count).

How long is Local Road over Tarkio Creek?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 30 ft wide.

Who owns Local Road over Tarkio Creek?

It is owned by the County Highway Agency.