US Bridges

Old Highway 34 over Skunk River

Good

Henry County, Iowa · 071070301 · Structure no. 000000000180541

Built
2000
25 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
492 ft
6 main spans
Daily traffic
450
2022 count
Owner
County
County Highway Agency

About this bridge

Old Highway 34 over Skunk River is a prestressed concrete stringer/multi-beam or girder carrying Old Highway 34 over Skunk River in Henry County, Iowa. It was built in 2000, so it is 25 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 450 vehicles a day, roughly 10% of them trucks, projected to reach 450 by 2044. The structure is 492 ft (150 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesOld Highway 34
CrossesSkunk River
Location071070301
RouteCounty Highway 0
StateIowa
Coordinates40.98857, -91.65775
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length492 ft (150 m)
Longest span97 ft (29.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2022)
Projected traffic450 by 2044
Trucks10%
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$1.5 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Highway 34 over Skunk River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Old Highway 34 over Skunk River 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 February 2024.

How much traffic does Old Highway 34 over Skunk River carry?

About 450 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Old Highway 34 over Skunk River?

The structure is 492 ft (150 m) long with a longest span of 97 ft (29.6 m) and a deck 33 ft wide.

Who owns Old Highway 34 over Skunk River?

It is owned by the County Highway Agency.