US Bridges

Local Road over Branch of Tarkio Creek

Good

Montgomery County, Iowa · 072373410 · Structure no. 000000000255461

Built
2003
22 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
3 main spans
Daily traffic
1,404
2022 count
Owner
County
County Highway Agency

About this bridge

Local Road over Branch of Tarkio Creek is a prestressed concrete stringer/multi-beam or girder carrying Local Road over Branch of Tarkio Creek in Montgomery County, Iowa. It was built in 2003, so it is 22 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,404 vehicles a day, projected to reach 1,404 by 2044. The structure is 151 ft (46 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLocal Road
CrossesBranch of Tarkio Creek
Location072373410
RouteCounty Highway 0
StateIowa
Coordinates40.98781, -95.09956
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81.7 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length151 ft (46 m)
Longest span57 ft (17.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,404 (2022)
Projected traffic1,404 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Branch of Tarkio Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Local Road over Branch of 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 May 2024.

How much traffic does Local Road over Branch of Tarkio Creek carry?

About 1,404 vehicles per day (2022 count).

How long is Local Road over Branch of Tarkio Creek?

The structure is 151 ft (46 m) long with a longest span of 57 ft (17.4 m) and a deck 33 ft wide.

Who owns Local Road over Branch of Tarkio Creek?

It is owned by the County Highway Agency.