US Bridges

Old US 10 over Brown Creek 013

Fair

Stillwater County, Montana · 4M SE Columbus · Structure no. L48245004+04001

Built
1935
90 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
96 ft
3 main spans
Daily traffic
1,617
2023 count
Owner
State
State Highway Agency

About this bridge

Old US 10 over Brown Creek 013 is a concrete tee beam carrying Old US 10 over Brown Creek 013 in Stillwater County, Montana. It was built in 1935, so it is 90 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 1,617 vehicles a day, roughly 3% of them trucks, projected to reach 1,722 by 2043. The structure is 96 ft (29.3 m) long and 31 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesOld US 10
CrossesBrown Creek 013
Location4M SE Columbus
RouteState Highway 48245
StateMontana
Coordinates45.60832, -109.16952
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length96 ft (29.3 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,617 (2023)
Projected traffic1,722 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 Old US 10 over Brown Creek 013 built?

It was built in 1935, making it 90 years old in 2025.

What condition is Old US 10 over Brown Creek 013 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 February 2024.

How much traffic does Old US 10 over Brown Creek 013 carry?

About 1,617 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Old US 10 over Brown Creek 013?

The structure is 96 ft (29.3 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns Old US 10 over Brown Creek 013?

It is owned by the State Highway Agency.