US Bridges

S 16 over Sheep Creek

Fair

Roosevelt County, Montana · South Edge Froid · Structure no. P00022075+08771

Built
1970
55 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
2 main spans
Daily traffic
2,129
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Sheep Creek is a prestressed concrete stringer/multi-beam or girder carrying S 16 over Sheep Creek in Roosevelt County, Montana. It was built in 1970, so it is 55 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 2,129 vehicles a day, roughly 6% of them trucks, projected to reach 2,502 by 2043. The structure is 133 ft (40.5 m) long and 46 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 16
CrossesSheep Creek
LocationSouth Edge Froid
RouteState Highway 16
CountyRoosevelt County
StateMontana
Coordinates48.33111, -104.49787
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span65 ft (19.8 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,129 (2023)
Projected traffic2,502 by 2043
Trucks6%
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 Sheep Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is S 16 over Sheep 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 Sheep Creek carry?

About 2,129 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S 16 over Sheep Creek?

The structure is 133 ft (40.5 m) long with a longest span of 65 ft (19.8 m) and a deck 46 ft wide.

Who owns S 16 over Sheep Creek?

It is owned by the State Highway Agency.