US Bridges

FM over Dd #181 Big Bear Ck

Fair

Pocahontas County, Iowa · 091343501 · Structure no. 000000000279141

Built
1973
52 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
589
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Dd #181 Big Bear Ck is a concrete continuous slab carrying FM over Dd #181 Big Bear Ck in Pocahontas County, Iowa. It was built in 1973, so it is 52 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.

It carries about 589 vehicles a day, roughly 25% of them trucks, projected to reach 589 by 2044. The structure is 91 ft (27.7 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFM
CrossesDd #181 Big Bear Ck
Location091343501
RouteCounty Highway 0
StateIowa
Coordinates42.66031, -94.82589
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.5 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length91 ft (27.7 m)
Longest span34 ft (10.4 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic589 (2022)
Projected traffic589 by 2044
Trucks25%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Dd #181 Big Bear Ck built?

It was built in 1973, making it 52 years old in 2025.

What condition is FM over Dd #181 Big Bear Ck 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 2024.

How much traffic does FM over Dd #181 Big Bear Ck carry?

About 589 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is FM over Dd #181 Big Bear Ck?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 36 ft wide.

Who owns FM over Dd #181 Big Bear Ck?

It is owned by the County Highway Agency.