US Bridges

S 5500 W over Texas Slough

Good

Madison County, Idaho · 2.6 N 2.0 W Thornton · Structure no. 000000000032911

Built
2012
13 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

S 5500 W over Texas Slough is a steel stringer/multi-beam or girder carrying S 5500 W over Texas Slough in Madison County, Idaho. It was built in 2012, so it is 13 years old, younger than the Idaho average of 45.3 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 225 by 2039. The structure is 42 ft (12.8 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS 5500 W
CrossesTexas Slough
Location2.6 N 2.0 W Thornton
RouteCounty Highway 0
StateIdaho
Coordinates43.79392, -111.88486
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating55.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length42 ft (12.8 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic225 by 2039
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S 5500 W over Texas Slough built?

It was built in 2012, making it 13 years old in 2025.

What condition is S 5500 W over Texas Slough 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 November 2022.

How much traffic does S 5500 W over Texas Slough carry?

About 150 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S 5500 W over Texas Slough?

The structure is 42 ft (12.8 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns S 5500 W over Texas Slough?

It is owned by the County Highway Agency.