US Bridges

S 59 over Thompson Creek

Fair

Garfield County, Montana · 36M SE Jordan · Structure no. P00018047+08321

Built
1997
28 years old
Condition
Fair
inspected April 2023
Type
Culvert
Steel
Length
37 ft
3 main spans
Daily traffic
295
2023 count
Owner
State
State Highway Agency

About this bridge

S 59 over Thompson Creek is a steel culvert carrying S 59 over Thompson Creek in Garfield County, Montana. It was built in 1997, so it is 28 years old, younger 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 295 vehicles a day, roughly 18% of them trucks, projected to reach 310 by 2043. The structure is 37 ft (11.4 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS 59
CrossesThompson Creek
Location36M SE Jordan
RouteState Highway 59
StateMontana
Coordinates46.94044, -106.44403
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length37 ft (11.4 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 traffic295 (2023)
Projected traffic310 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

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 59 over Thompson Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is S 59 over Thompson Creek 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 April 2023.

How much traffic does S 59 over Thompson Creek carry?

About 295 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is S 59 over Thompson Creek?

The structure is 37 ft (11.4 m) long with a longest span of 10 ft (3 m).

Who owns S 59 over Thompson Creek?

It is owned by the State Highway Agency.