US Bridges

FM over Six Mile Creek

Good

Sioux County, Iowa · 096462502 · Structure no. 000000000311981

Built
1982
43 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
1,337
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Six Mile Creek is a concrete culvert carrying FM over Six Mile Creek in Sioux County, Iowa. It was built in 1982, so it is 43 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,337 vehicles a day, roughly 28% of them trucks, projected to reach 1,337 by 2043. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFM
CrossesSix Mile Creek
Location096462502
RouteCounty Highway 0
StateIowa
Coordinates43.10953, -96.23494
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,337 (2022)
Projected traffic1,337 by 2043
Trucks28%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Six Mile Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is FM over Six Mile Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does FM over Six Mile Creek carry?

About 1,337 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is FM over Six Mile Creek?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m).

Who owns FM over Six Mile Creek?

It is owned by the County Highway Agency.