US Bridges

NF 132-BIG Creek R over Big Creek 063

Fair

Park County, Montana · 11M SW Emigrant · Structure no. L34307004+08001

Built
1997
28 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

NF 132-BIG Creek R over Big Creek 063 is a steel stringer/multi-beam or girder carrying NF 132-BIG Creek R over Big Creek 063 in Park County, Montana. It was built in 1997, so it is 28 years old, younger 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 37 ft (11.3 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNF 132-BIG Creek R
CrossesBig Creek 063
Location11M SW Emigrant
RouteCounty Highway 34307
StateMontana
Coordinates45.30894, -110.91054
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span31 ft (9.4 m)
Deck width20 ft (6 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 NF 132-BIG Creek R over Big Creek 063 built?

It was built in 1997, making it 28 years old in 2025.

What condition is NF 132-BIG Creek R over Big 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 May 2023.

How much traffic does NF 132-BIG Creek R over Big Creek 063 carry?

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

How long is NF 132-BIG Creek R over Big Creek 063?

The structure is 37 ft (11.3 m) long with a longest span of 31 ft (9.4 m) and a deck 20 ft wide.

Who owns NF 132-BIG Creek R over Big Creek 063?

It is owned by the County Highway Agency.