US Bridges

Laurel Airport RD over RR 045

Good

Yellowstone County, Montana · 3M NE Laurel · Structure no. 000000000004810

Built
2017
8 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
102 ft
Daily traffic
881
2023 count
Owner
County
County Highway Agency

About this bridge

Laurel Airport RD over RR 045 is a prestressed concrete tee beam carrying Laurel Airport RD over RR 045 in Yellowstone County, Montana. It was built in 2017, so it is 8 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 881 vehicles a day, roughly 3% of them trucks, projected to reach 938 by 2043. The structure is 102 ft (31.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLaurel Airport RD
CrossesRR 045
Location3M NE Laurel
RouteCounty Highway 56507
CountyYellowstone County
StateMontana
Coordinates45.69722, -108.7095
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans0
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span98 ft (29.8 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic881 (2023)
Projected traffic938 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$243,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Laurel Airport RD over RR 045 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Laurel Airport RD over RR 045 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Laurel Airport RD over RR 045 carry?

About 881 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Laurel Airport RD over RR 045?

The structure is 102 ft (31.1 m) long with a longest span of 98 ft (29.8 m) and a deck 36 ft wide.

Who owns Laurel Airport RD over RR 045?

It is owned by the County Highway Agency.