US Bridges

S 13 over East Fork Poplar River

Good

Daniels County, Montana · 8M N Scobey · Structure no. P00032059+04851

Built
1957
68 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
143 ft
4 main spans
Daily traffic
42
2023 count
Owner
State
State Highway Agency

About this bridge

S 13 over East Fork Poplar River is a concrete continuous tee beam carrying S 13 over East Fork Poplar River in Daniels County, Montana. It was built in 1957, so it is 68 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 42 vehicles a day, roughly 2% of them trucks, projected to reach 44 by 2043. The structure is 143 ft (43.6 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS 13
CrossesEast Fork Poplar River
Location8M N Scobey
RouteState Highway 13
StateMontana
Coordinates48.90951, -105.41576
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating28 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length143 ft (43.6 m)
Longest span54 ft (16.5 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42 (2023)
Projected traffic44 by 2043
Trucks2%
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

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 S 13 over East Fork Poplar River built?

It was built in 1957, making it 68 years old in 2025.

What condition is S 13 over East Fork Poplar River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does S 13 over East Fork Poplar River carry?

About 42 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S 13 over East Fork Poplar River?

The structure is 143 ft (43.6 m) long with a longest span of 54 ft (16.5 m) and a deck 28 ft wide.

Who owns S 13 over East Fork Poplar River?

It is owned by the State Highway Agency.