US Bridges

S 508 FH 62 over Red Top Creek

Good

Lincoln County, Montana · 13M SW Yaak · Structure no. S00508017+01001

Built
1994
31 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
260
2023 count
Owner
State
State Highway Agency

About this bridge

S 508 FH 62 over Red Top Creek is a prestressed concrete stringer/multi-beam or girder carrying S 508 FH 62 over Red Top Creek in Lincoln County, Montana. It was built in 1994, so it is 31 years old, younger 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 260 vehicles a day, roughly 2% of them trucks, projected to reach 273 by 2043. The structure is 55 ft (16.7 m) long and 30 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

CarriesS 508 FH 62
CrossesRed Top Creek
Location13M SW Yaak
RouteState Highway 508
StateMontana
Coordinates48.76132, -115.91733
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.7 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic260 (2023)
Projected traffic273 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.2 mi (129 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 508 FH 62 over Red Top Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is S 508 FH 62 over Red Top Creek 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 January 2025.

How much traffic does S 508 FH 62 over Red Top Creek carry?

About 260 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S 508 FH 62 over Red Top Creek?

The structure is 55 ft (16.7 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns S 508 FH 62 over Red Top Creek?

It is owned by the State Highway Agency.