US Bridges

N.Side Warm L. Rd. over Warm Lake Creek

Fair

Valley County, Idaho · Warm Lake Idaho · Structure no. 040204000001090

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
23 ft
1 main span
Daily traffic
150
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

N.Side Warm L. Rd. over Warm Lake Creek is a wood or timber stringer/multi-beam or girder carrying N.Side Warm L. Rd. over Warm Lake Creek in Valley County, Idaho. It was built in 1961, so it is 64 years old, older than the Idaho average of 45.3 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 150 vehicles a day, roughly 15% of them trucks, projected to reach 225 by 2045. The structure is 23 ft (7 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesN.Side Warm L. Rd.
CrossesWarm Lake Creek
LocationWarm Lake Idaho
RouteFederal Lands Road 489
CountyValley County
StateIdaho
Coordinates44.65325, -115.66131
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2018)
Projected traffic225 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N.Side Warm L. Rd. over Warm Lake Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is N.Side Warm L. Rd. over Warm Lake Creek 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 October 2024.

How much traffic does N.Side Warm L. Rd. over Warm Lake Creek carry?

About 150 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is N.Side Warm L. Rd. over Warm Lake Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 25 ft wide.

Who owns N.Side Warm L. Rd. over Warm Lake Creek?

It is owned by the U.S. Forest Service.