US Bridges

Mullowney LN over RR

Fair

Yellowstone County, Montana · Billings-Mullowney LN · Structure no. U01010002+06982

Built
2007
18 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
161 ft
2 main spans
Daily traffic
23,980
2023 count
Owner
State
State Highway Agency

About this bridge

Mullowney LN over RR is a prestressed concrete stringer/multi-beam or girder carrying Mullowney LN over RR in Yellowstone County, Montana. It was built in 2007, so it is 18 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 6 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 23,980 vehicles a day, projected to reach 27,457 by 2043. The structure is 161 ft (49.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMullowney LN
CrossesRR
LocationBillings-Mullowney LN
RouteCity Street 111
CountyYellowstone County
StateMontana
Coordinates45.75318, -108.5622
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length161 ft (49.2 m)
Longest span102 ft (31 m)
Deck width45 ft (13.7 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,980 (2023)
Projected traffic27,457 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$546,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mullowney LN over RR built?

It was built in 2007, making it 18 years old in 2025.

What condition is Mullowney LN 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 October 2023.

How much traffic does Mullowney LN over RR carry?

About 23,980 vehicles per day (2023 count).

How long is Mullowney LN over RR?

The structure is 161 ft (49.2 m) long with a longest span of 102 ft (31 m) and a deck 45 ft wide.

Who owns Mullowney LN over RR?

It is owned by the State Highway Agency.