US Bridges

S 16 over Lost Creek

Fair

Roosevelt County, Montana · 3M N Froid · Structure no. P00022072+08681

Built
1976
49 years old
Condition
Fair
inspected December 2024
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
918
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Lost Creek is a steel culvert carrying S 16 over Lost Creek in Roosevelt County, Montana. It was built in 1976, so it is 49 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 918 vehicles a day, roughly 8% of them trucks, projected to reach 964 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 16
CrossesLost Creek
Location3M N Froid
RouteState Highway 16
CountyRoosevelt County
StateMontana
Coordinates48.37447, -104.49761
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable 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 spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic918 (2023)
Projected traffic964 by 2043
Trucks8%
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 16 over Lost Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is S 16 over Lost 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 December 2024.

How much traffic does S 16 over Lost Creek carry?

About 918 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S 16 over Lost Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (3.9 m).

Who owns S 16 over Lost Creek?

It is owned by the State Highway Agency.