US Bridges

S 508 FH 62 over Spread Creek

Good

Lincoln County, Montana · 7M W Yaak · Structure no. S00508023+07001

Built
1989
36 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
135 ft
3 main spans
Daily traffic
274
2023 count
Owner
State
State Highway Agency

About this bridge

S 508 FH 62 over Spread Creek is a concrete continuous box beam or girders - single or spread carrying S 508 FH 62 over Spread Creek in Lincoln County, Montana. It was built in 1989, so it is 36 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 274 vehicles a day, roughly 2% of them trucks, projected to reach 288 by 2043. The structure is 135 ft (41.1 m) long and 35 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

CarriesS 508 FH 62
CrossesSpread Creek
Location7M W Yaak
RouteState Highway 508
StateMontana
Coordinates48.82298, -115.85114
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating37 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span88 ft (26.8 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic274 (2023)
Projected traffic288 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 Spread Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is S 508 FH 62 over Spread 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 August 2024.

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

About 274 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S 508 FH 62 over Spread Creek?

The structure is 135 ft (41.1 m) long with a longest span of 88 ft (26.8 m) and a deck 35 ft wide.

Who owns S 508 FH 62 over Spread Creek?

It is owned by the State Highway Agency.