US Bridges

S 223 over Teton River

Fair

Chouteau County, Montana · 3M NW Fort Benton · Structure no. S00223001+03001

Built
1953
72 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete
Length
299 ft
6 main spans
Daily traffic
541
2023 count
Owner
State
State Highway Agency

About this bridge

S 223 over Teton River is a concrete tee beam carrying S 223 over Teton River in Chouteau County, Montana. It was built in 1953, so it is 72 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 541 vehicles a day, roughly 29% of them trucks, projected to reach 568 by 2043. The structure is 299 ft (91.1 m) long and 27 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

CarriesS 223
CrossesTeton River
Location3M NW Fort Benton
RouteState Highway 223
StateMontana
Coordinates47.84418, -110.71445
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 15
Structure length299 ft (91.1 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic541 (2023)
Projected traffic568 by 2043
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S 223 over Teton River built?

It was built in 1953, making it 72 years old in 2025.

What condition is S 223 over Teton River 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 February 2023.

How much traffic does S 223 over Teton River carry?

About 541 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is S 223 over Teton River?

The structure is 299 ft (91.1 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns S 223 over Teton River?

It is owned by the State Highway Agency.