US Bridges

FM over Brown Creek (DD#121)

Fair

Emmet County, Iowa · 099330502 · Structure no. 000000000148771

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
379
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Brown Creek (DD#121) is a concrete continuous slab carrying FM over Brown Creek (DD#121) in Emmet County, Iowa. It was built in 1971, so it is 54 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 379 vehicles a day, roughly 19% of them trucks, projected to reach 379 by 2043. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM
CrossesBrown Creek (DD#121)
Location099330502
RouteCounty Highway 0
CountyEmmet County
StateIowa
Coordinates43.42448, -94.77837
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length78 ft (23.8 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic379 (2022)
Projected traffic379 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$500,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Brown Creek (DD#121) built?

It was built in 1971, making it 54 years old in 2025.

What condition is FM over Brown Creek (DD#121) 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 August 2023.

How much traffic does FM over Brown Creek (DD#121) carry?

About 379 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is FM over Brown Creek (DD#121)?

The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Brown Creek (DD#121)?

It is owned by the County Highway Agency.