US Bridges

US 89 over RR

Fair

Park County, Montana · 5M NE Livingston · Structure no. P00059000+00611

Built
1955
70 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
129 ft
3 main spans
Daily traffic
2,174
2023 count
Owner
State
State Highway Agency

About this bridge

US 89 over RR is a concrete tee beam carrying US 89 over RR in Park County, Montana. It was built in 1955, so it is 70 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.

It carries about 2,174 vehicles a day, roughly 2% of them trucks, projected to reach 2,283 by 2043. The structure is 129 ft (39.3 m) long and 33 ft wide. If it were closed, the detour would be 88.2 mi (142 km).

Location

Open in Google Maps
CarriesUS 89
CrossesRR
Location5M NE Livingston
RouteU.S. Route 89
CountyPark County
StateMontana
Coordinates45.7076, -110.45592
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
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.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length129 ft (39.3 m)
Longest span47 ft (14.2 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,174 (2023)
Projected traffic2,283 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed88.2 mi (142 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 89 over RR built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 89 over RR 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 2023.

How much traffic does US 89 over RR carry?

About 2,174 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 89 over RR?

The structure is 129 ft (39.3 m) long with a longest span of 47 ft (14.2 m) and a deck 33 ft wide.

Who owns US 89 over RR?

It is owned by the State Highway Agency.