US Bridges

US 12 over Deadman Creek

Fair

Idaho County, Idaho · 10 E. Lowell · Structure no. 000000000010460

Built
1957
68 years old
Condition
Fair
inspected May 2022
Type
Tee Beam
Concrete Continuous
Length
85 ft
3 main spans
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Deadman Creek is a concrete continuous tee beam carrying US 12 over Deadman Creek in Idaho County, Idaho. It was built in 1957, so it is 68 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 550 vehicles a day, roughly 31% of them trucks, projected to reach 825 by 2042. The structure is 85 ft (25.9 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 12
CrossesDeadman Creek
Location10 E. Lowell
RouteU.S. Route 12
CountyIdaho County
StateIdaho
Coordinates46.22678, -115.50161
Functional classRural Principal Arterial - Other

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 inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic825 by 2042
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Deadman Creek built?

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

What condition is US 12 over Deadman 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 May 2022.

How much traffic does US 12 over Deadman Creek carry?

About 550 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is US 12 over Deadman Creek?

The structure is 85 ft (25.9 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns US 12 over Deadman Creek?

It is owned by the State Highway Agency.