US Bridges

175 TH over Raccoon River

FairPosted for load

Greene County, Iowa · 084320803 · Structure no. 000000000162810

Built
1942
83 years old
Condition
Fair
inspected June 2024
Type
Girder and Floorbeam System
Concrete Continuous
Length
300 ft
5 main spans
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

175 TH over Raccoon River is a concrete continuous girder and floorbeam system carrying 175 TH over Raccoon River in Greene County, Iowa. It was built in 1942, so it is 83 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 29 vehicles a day, projected to reach 29 by 2044. The structure is 300 ft (91.4 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries175 TH
CrossesRaccoon River
Location084320803
RouteCounty Highway 0
CountyGreene County
StateIowa
Coordinates42.10157, -94.6051
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating21.5 US tons
Inventory rating12.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length300 ft (91.4 m)
Longest span66 ft (20.1 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 175 TH over Raccoon River built?

It was built in 1942, making it 83 years old in 2025.

What condition is 175 TH over 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 June 2024.

How much traffic does 175 TH over Raccoon River carry?

About 29 vehicles per day (2022 count).

How long is 175 TH over Raccoon River?

The structure is 300 ft (91.4 m) long with a longest span of 66 ft (20.1 m) and a deck 22 ft wide.

Who owns 175 TH over Raccoon River?

It is owned by the County Highway Agency.