US Bridges

FM 105th ST over Small Stream

Good

Franklin County, Iowa · 091191905 · Structure no. 000000000025201

Built
2008
17 years old
Condition
Good
inspected June 2021
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
540
2022 count
Owner
County
County Highway Agency

About this bridge

FM 105th ST over Small Stream is a concrete continuous culvert carrying FM 105th ST over Small Stream in Franklin County, Iowa. It was built in 2008, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 540 vehicles a day, roughly 13% of them trucks, projected to reach 540 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 14.3 mi (23 km).

CarriesFM 105th ST
CrossesSmall Stream
Location091191905
RouteCounty Highway 0
StateIowa
Coordinates42.67981, -93.14223
Functional classRural Major 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.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic540 (2022)
Projected traffic540 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 105th ST over Small Stream built?

It was built in 2008, making it 17 years old in 2025.

What condition is FM 105th ST over Small Stream 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 June 2021.

How much traffic does FM 105th ST over Small Stream carry?

About 540 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM 105th ST over Small Stream?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns FM 105th ST over Small Stream?

It is owned by the County Highway Agency.