US Bridges

I 90 over Whitetail Creek

Fair

Silver Bow County, Montana · 1M E Whitehall · Structure no. I00090249+04001

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
10,349
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Whitetail Creek is a steel culvert carrying I 90 over Whitetail Creek in Silver Bow County, Montana. It was built in 1965, so it is 60 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 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 10,349 vehicles a day, roughly 20% of them trucks, projected to reach 11,487 by 2043. The structure is 30 ft (9 m) long.

CarriesI 90
CrossesWhitetail Creek
Location1M E Whitehall
RouteInterstate 90
StateMontana
Coordinates45.87667, -112.09397
Functional classRural 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,349 (2023)
Projected traffic11,487 by 2043
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 over Whitetail Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 90 over Whitetail Creek 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 August 2023.

How much traffic does I 90 over Whitetail Creek carry?

About 10,349 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is I 90 over Whitetail Creek?

The structure is 30 ft (9 m) long with a longest span of 13 ft (3.9 m).

Who owns I 90 over Whitetail Creek?

It is owned by the State Highway Agency.