US Bridges

Mt HWY 2 over Colbert Creek 063

Fair

Jefferson County, Montana · 7M W Whitehall · Structure no. L22250007+06001

Built
1931
94 years old, rebuilt 1940
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
2 main spans
Daily traffic
608
2023 count
Owner
State
State Highway Agency

About this bridge

Mt HWY 2 over Colbert Creek 063 is a wood or timber stringer/multi-beam or girder carrying Mt HWY 2 over Colbert Creek 063 in Jefferson County, Montana. It was built in 1931 and reconstructed in 1940, so it is 94 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 608 vehicles a day, roughly 5% of them trucks, projected to reach 638 by 2043. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesMt HWY 2
CrossesColbert Creek 063
Location7M W Whitehall
RouteState Highway 2
CountyJefferson County
StateMontana
Coordinates45.85355, -112.25129
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic608 (2023)
Projected traffic638 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt HWY 2 over Colbert Creek 063 built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1940.

What condition is Mt HWY 2 over Colbert Creek 063 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 September 2024.

How much traffic does Mt HWY 2 over Colbert Creek 063 carry?

About 608 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mt HWY 2 over Colbert Creek 063?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.

Who owns Mt HWY 2 over Colbert Creek 063?

It is owned by the State Highway Agency.