US Bridges

FM over Purgatory Creek

FairPosted for load

Carroll County, Iowa · 084330103 · Structure no. 000000000095060

Built
1961
64 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Purgatory Creek is a concrete continuous slab carrying FM over Purgatory Creek in Carroll County, Iowa. It was built in 1961, so it is 64 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. Its operating status is: posted for load restriction.

It carries about 34 vehicles a day, projected to reach 34 by 2043. The structure is 100 ft (30.5 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesFM
CrossesPurgatory Creek
Location084330103
RouteCounty Highway 0
CountyCarroll County
StateIowa
Coordinates42.11412, -94.64462
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.6 US tons
Inventory rating19.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length100 ft (30.5 m)
Longest span39 ft (11.9 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 FM over Purgatory Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is FM over Purgatory Creek 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 July 2023.

How much traffic does FM over Purgatory Creek carry?

About 34 vehicles per day (2022 count).

How long is FM over Purgatory Creek?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 22 ft wide.

Who owns FM over Purgatory Creek?

It is owned by the County Highway Agency.