US Bridges

S 254 over Lower Seven Mile Creek

FairPosted for load

Dawson County, Montana · 6M S Bloomfield · Structure no. S00254017+05001

Built
1952
73 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
321
2023 count
Owner
State
State Highway Agency

About this bridge

S 254 over Lower Seven Mile Creek is a wood or timber stringer/multi-beam or girder carrying S 254 over Lower Seven Mile Creek in Dawson County, Montana. It was built in 1952, so it is 73 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 321 vehicles a day, roughly 9% of them trucks, projected to reach 337 by 2043. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesS 254
CrossesLower Seven Mile Creek
Location6M S Bloomfield
RouteState Highway 254
StateMontana
Coordinates47.32786, -104.91756
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating25 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic321 (2023)
Projected traffic337 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 254 over Lower Seven Mile Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is S 254 over Lower Seven Mile 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 September 2024.

How much traffic does S 254 over Lower Seven Mile Creek carry?

About 321 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is S 254 over Lower Seven Mile Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns S 254 over Lower Seven Mile Creek?

It is owned by the State Highway Agency.