US Bridges

Homestake Pass over Int Homestake-I 90 005

Good

Jefferson County, Montana · Homestake Pass · Structure no. L22119000+01001

Built
1966
59 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
231 ft
4 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Homestake Pass over Int Homestake-I 90 005 is a prestressed concrete stringer/multi-beam or girder carrying Homestake Pass over Int Homestake-I 90 005 in Jefferson County, Montana. It was built in 1966, so it is 59 years old, older 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 231 ft (70.4 m) long and 31 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesHomestake Pass
CrossesInt Homestake-I 90 005
LocationHomestake Pass
RouteCounty Highway 22119
StateMontana
Coordinates45.91947, -112.41188
Functional classRural Local

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length231 ft (70.4 m)
Longest span65 ft (19.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed19.9 mi (32 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 Homestake Pass over Int Homestake-I 90 005 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Homestake Pass over Int Homestake-I 90 005 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 December 2023.

How much traffic does Homestake Pass over Int Homestake-I 90 005 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Homestake Pass over Int Homestake-I 90 005?

The structure is 231 ft (70.4 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.

Who owns Homestake Pass over Int Homestake-I 90 005?

It is owned by the State Highway Agency.