US Bridges

S 16 over Fox Creek

Fair

Richland County, Montana · 5M SW Sidney · Structure no. P00020046+06831

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
3 main spans
Daily traffic
2,821
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Fox Creek is a prestressed concrete stringer/multi-beam or girder carrying S 16 over Fox Creek in Richland County, Montana. It was built in 1974, so it is 51 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 2,821 vehicles a day, roughly 11% of them trucks, projected to reach 2,976 by 2043. The structure is 183 ft (55.8 m) long and 46 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

Location

Open in Google Maps
CarriesS 16
CrossesFox Creek
Location5M SW Sidney
RouteState Highway 16
CountyRichland County
StateMontana
Coordinates47.64108, -104.20933
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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 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 spans3
Design loadHS 20
Structure length183 ft (55.8 m)
Longest span60 ft (18.3 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,821 (2023)
Projected traffic2,976 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 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 Fox Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is S 16 over Fox 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 May 2024.

How much traffic does S 16 over Fox Creek carry?

About 2,821 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S 16 over Fox Creek?

The structure is 183 ft (55.8 m) long with a longest span of 60 ft (18.3 m) and a deck 46 ft wide.

Who owns S 16 over Fox Creek?

It is owned by the State Highway Agency.