US Bridges

IRR BIA RTE 228 over Rosebud Creek

Fair

Big Horn County, Montana · 18 KM West of Lame Deer · Structure no. 00000000000C725

Built
1983
42 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
10
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 228 over Rosebud Creek is a steel stringer/multi-beam or girder carrying IRR BIA RTE 228 over Rosebud Creek in Big Horn County, Montana. It was built in 1983, so it is 42 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 5 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 13 by 2042. The structure is 51 ft (15.4 m) long and 14 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesIRR BIA RTE 228
CrossesRosebud Creek
Location18 KM West of Lame Deer
RouteFederal Lands Road 228
CountyBig Horn County
StateMontana
Coordinates45.58639, -106.85889
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating72.2 US tons
Inventory rating43.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length51 ft (15.4 m)
Longest span50 ft (15.2 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2024)
Projected traffic13 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$52,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 228 over Rosebud Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is IRR BIA RTE 228 over Rosebud 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 June 2024.

How much traffic does IRR BIA RTE 228 over Rosebud Creek carry?

About 10 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is IRR BIA RTE 228 over Rosebud Creek?

The structure is 51 ft (15.4 m) long with a longest span of 50 ft (15.2 m) and a deck 14 ft wide.

Who owns IRR BIA RTE 228 over Rosebud Creek?

It is owned by the Bureau of Indian Affairs.