US Bridges

IRR BIA RTE 14 over Big Shoulder Creek

FairPosted for load

Big Horn County, Montana · 7.2KM South of Crow Agncy · Structure no. 00000000000C202

Built
1963
62 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
20 ft
1 main span
Daily traffic
440
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 14 over Big Shoulder Creek is a wood or timber stringer/multi-beam or girder carrying IRR BIA RTE 14 over Big Shoulder Creek in Big Horn County, Montana. It was built in 1963, so it is 62 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 440 vehicles a day, roughly 10% of them trucks, projected to reach 515 by 2044. The structure is 20 ft (6.2 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIRR BIA RTE 14
CrossesBig Shoulder Creek
Location7.2KM South of Crow Agncy
RouteFederal Lands Road 14
StateMontana
Coordinates45.54975, -107.43769
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.4 US tons
Inventory rating15.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length20 ft (6.2 m)
Longest span19 ft (5.8 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2024)
Projected traffic515 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 14 over Big Shoulder Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is IRR BIA RTE 14 over Big Shoulder 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 14 over Big Shoulder Creek carry?

About 440 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is IRR BIA RTE 14 over Big Shoulder Creek?

The structure is 20 ft (6.2 m) long with a longest span of 19 ft (5.8 m) and a deck 23 ft wide.

Who owns IRR BIA RTE 14 over Big Shoulder Creek?

It is owned by the Bureau of Indian Affairs.