US Bridges

I 94 over Int P 20-SIDNEY

Fair

Dawson County, Montana · NW Glendive · Structure no. I00094213+03641

Built
1969
56 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
219 ft
3 main spans
Daily traffic
2,981
2023 count
Owner
State
State Highway Agency

About this bridge

I 94 over Int P 20-SIDNEY is a prestressed concrete stringer/multi-beam or girder carrying I 94 over Int P 20-SIDNEY in Dawson County, Montana. It was built in 1969, so it is 56 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 2,981 vehicles a day, roughly 20% of them trucks, projected to reach 3,264 by 2043. The structure is 219 ft (66.7 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesI 94
CrossesInt P 20-SIDNEY
LocationNW Glendive
RouteInterstate 94
CountyDawson County
StateMontana
Coordinates47.11488, -104.73609
Functional classUrban Principal Arterial - Interstate

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length219 ft (66.7 m)
Longest span77 ft (23.5 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,981 (2023)
Projected traffic3,264 by 2043
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 94 over Int P 20-SIDNEY built?

It was built in 1969, making it 56 years old in 2025.

What condition is I 94 over Int P 20-SIDNEY 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 2024.

How much traffic does I 94 over Int P 20-SIDNEY carry?

About 2,981 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is I 94 over Int P 20-SIDNEY?

The structure is 219 ft (66.7 m) long with a longest span of 77 ft (23.5 m) and a deck 41 ft wide.

Who owns I 94 over Int P 20-SIDNEY?

It is owned by the State Highway Agency.