US Bridges

Swamp Road over Camas Creek

PoorPosted for load

Camas County, Idaho · 1.8 S. 0.3 E. Hill City · Structure no. 000000000023860

Built
1965
60 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
3 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

Swamp Road over Camas Creek is a wood or timber stringer/multi-beam or girder carrying Swamp Road over Camas Creek in Camas County, Idaho. It was built in 1965, so it is 60 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, roughly 33% of them trucks, projected to reach 60 by 2042. The structure is 47 ft (14.3 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSwamp Road
CrossesCamas Creek
Location1.8 S. 0.3 E. Hill City
RouteCounty Highway 0
StateIdaho
Coordinates43.27264, -115.0475
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.1 US tons
Inventory rating15 US tons

Structure

MaterialWood or Timber
DeckCorrugated steel
Main spans3
Design loadH 10
Structure length47 ft (14.3 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic60 by 2042
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$485,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Swamp Road over Camas Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Swamp Road over Camas Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Swamp Road over Camas Creek carry?

About 40 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is Swamp Road over Camas Creek?

The structure is 47 ft (14.3 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Swamp Road over Camas Creek?

It is owned by the County Highway Agency.