US Bridges

Frontage Road 137 over Warm Springs Creek 039

Fair

Deer Lodge County, Montana · Warm Springs · Structure no. L12137000+02001

Built
1974
51 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Frontage Road 137 over Warm Springs Creek 039 is a concrete slab carrying Frontage Road 137 over Warm Springs Creek 039 in Deer Lodge County, Montana. It was built in 1974, so it is 51 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 27 ft (8.2 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesFrontage Road 137
CrossesWarm Springs Creek 039
LocationWarm Springs
RouteState Highway 12137
StateMontana
Coordinates46.1814, -112.78194
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.
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Frontage Road 137 over Warm Springs Creek 039 built?

It was built in 1974, making it 51 years old in 2025.

What condition is Frontage Road 137 over Warm Springs Creek 039 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 March 2024.

How much traffic does Frontage Road 137 over Warm Springs Creek 039 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Frontage Road 137 over Warm Springs Creek 039?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns Frontage Road 137 over Warm Springs Creek 039?

It is owned by the State Highway Agency.