US Bridges

Airport DR over Int Gore Hill-I 15

Fair

Cascade County, Montana · 1M SW Great Falls · Structure no. U05212000+05881

Built
1967
58 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
241 ft
4 main spans
Daily traffic
4,478
2023 count
Owner
State
State Highway Agency

About this bridge

Airport DR over Int Gore Hill-I 15 is a prestressed concrete stringer/multi-beam or girder carrying Airport DR over Int Gore Hill-I 15 in Cascade County, Montana. It was built in 1967, so it is 58 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 4,478 vehicles a day, projected to reach 4,702 by 2043. The structure is 241 ft (73.4 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesAirport DR
CrossesInt Gore Hill-I 15
Location1M SW Great Falls
RouteCity Street 5212
CountyCascade County
StateMontana
Coordinates47.47232, -111.36098
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating53 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length241 ft (73.4 m)
Longest span61 ft (18.7 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,478 (2023)
Projected traffic4,702 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 Airport DR over Int Gore Hill-I 15 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Airport DR over Int Gore Hill-I 15 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 January 2024.

How much traffic does Airport DR over Int Gore Hill-I 15 carry?

About 4,478 vehicles per day (2023 count).

How long is Airport DR over Int Gore Hill-I 15?

The structure is 241 ft (73.4 m) long with a longest span of 61 ft (18.7 m) and a deck 32 ft wide.

Who owns Airport DR over Int Gore Hill-I 15?

It is owned by the State Highway Agency.