US Bridges

Old US 10 over Allen Creek 016

Fair

Stillwater County, Montana · 7M W Park City · Structure no. L48245010+03001

Built
1928
97 years old, rebuilt 1948
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
1,617
2023 count
Owner
State
State Highway Agency

About this bridge

Old US 10 over Allen Creek 016 is a steel stringer/multi-beam or girder carrying Old US 10 over Allen Creek 016 in Stillwater County, Montana. It was built in 1928 and reconstructed in 1948, so it is 97 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 1,617 vehicles a day, roughly 3% of them trucks, projected to reach 1,722 by 2043. The structure is 24 ft (7.3 m) long and 26 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesOld US 10
CrossesAllen Creek 016
Location7M W Park City
RouteState Highway 48245
CountyStillwater County
StateMontana
Coordinates45.59476, -109.05412
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span21 ft (6.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 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 Allen Creek 016 built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1948.

What condition is Old US 10 over Allen Creek 016 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 Allen Creek 016 carry?

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

How long is Old US 10 over Allen Creek 016?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Old US 10 over Allen Creek 016?

It is owned by the State Highway Agency.