US Bridges

F60 Old HWY 6 over South Raccoon River

Fair

Dallas County, Iowa · 078290904 · Structure no. 000000000021791

Built
1978
47 years old, rebuilt 2017
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
406 ft
5 main spans
Daily traffic
1,446
2022 count
Owner
County
County Highway Agency

About this bridge

F60 Old HWY 6 over South Raccoon River is a prestressed concrete stringer/multi-beam or girder carrying F60 Old HWY 6 over South Raccoon River in Dallas County, Iowa. It was built in 1978 and reconstructed in 2017, so it is 47 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 1,446 vehicles a day, roughly 15% of them trucks, projected to reach 1,446 by 2043. The structure is 406 ft (123.7 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesF60 Old HWY 6
CrossesSouth Raccoon River
Location078290904
RouteCounty Highway 0
StateIowa
Coordinates41.57105, -94.19208
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.4 US tons
Inventory rating46.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length406 ft (123.7 m)
Longest span97 ft (29.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,446 (2022)
Projected traffic1,446 by 2043
Trucks15%
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 F60 Old HWY 6 over South Raccoon River built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2017.

What condition is F60 Old HWY 6 over South Raccoon 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 2023.

How much traffic does F60 Old HWY 6 over South Raccoon River carry?

About 1,446 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is F60 Old HWY 6 over South Raccoon River?

The structure is 406 ft (123.7 m) long with a longest span of 97 ft (29.6 m) and a deck 39 ft wide.

Who owns F60 Old HWY 6 over South Raccoon River?

It is owned by the County Highway Agency.