US Bridges

Stc 5804;WESTSIDE over Trout Creek;n.Branch

Fair

Boundary County, Idaho · 4.8 S. 2.3 W. Copeland · Structure no. 000000000020715

Built
1957
68 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
24 ft
1 main span
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 5804;WESTSIDE over Trout Creek;n.Branch is a wood or timber stringer/multi-beam or girder carrying Stc 5804;WESTSIDE over Trout Creek;n.Branch in Boundary 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 5 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 300 vehicles a day, roughly 7% of them trucks, projected to reach 450 by 2042. The structure is 24 ft (7.3 m) long and 17 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesStc 5804;WESTSIDE
CrossesTrout Creek;n.Branch
Location4.8 S. 2.3 W. Copeland
RouteCounty Highway 5804
CountyBoundary County
StateIdaho
Coordinates48.83461, -116.42044
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width17 ft (5.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic450 by 2042
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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$335,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 5804;WESTSIDE over Trout Creek;n.Branch built?

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

What condition is Stc 5804;WESTSIDE over Trout Creek;n.Branch 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 July 2024.

How much traffic does Stc 5804;WESTSIDE over Trout Creek;n.Branch carry?

About 300 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Stc 5804;WESTSIDE over Trout Creek;n.Branch?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 17 ft wide.

Who owns Stc 5804;WESTSIDE over Trout Creek;n.Branch?

It is owned by the County Highway Agency.