US Bridges

FM over W Br Little Sioux

Poor

Dickinson County, Iowa · 100381301 · Structure no. 000000000145391

Built
1977
48 years old
Condition
Poor
inspected April 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
61
2021 count
Owner
County
County Highway Agency

About this bridge

FM over W Br Little Sioux is a concrete continuous slab carrying FM over W Br Little Sioux in Dickinson County, Iowa. It was built in 1977, so it is 48 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 61 vehicles a day, projected to reach 61 by 2043. The structure is 102 ft (31.1 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesW Br Little Sioux
Location100381301
RouteCounty Highway 0
CountyDickinson County
StateIowa
Coordinates43.48839, -95.28302
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.9 US tons
Inventory rating33.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length102 ft (31.1 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2021)
Projected traffic61 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over W Br Little Sioux built?

It was built in 1977, making it 48 years old in 2025.

What condition is FM over W Br Little Sioux in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does FM over W Br Little Sioux carry?

About 61 vehicles per day (2021 count).

How long is FM over W Br Little Sioux?

The structure is 102 ft (31.1 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns FM over W Br Little Sioux?

It is owned by the County Highway Agency.