US Bridges

Stc 5805;WESTSIDE over Parker Creek

FairPosted for load

Boundary County, Idaho · 5.3 S. 0.1 E. Porthill · Structure no. 000000000020730

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 5805;WESTSIDE over Parker Creek is a wood or timber stringer/multi-beam or girder carrying Stc 5805;WESTSIDE over Parker Creek in Boundary County, Idaho. It was built in 1970, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, roughly 14% of them trucks, projected to reach 120 by 2042. The structure is 47 ft (14.3 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStc 5805;WESTSIDE
CrossesParker Creek
Location5.3 S. 0.1 E. Porthill
RouteCounty Highway 5805
CountyBoundary County
StateIdaho
Coordinates48.9185, -116.49258
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$538,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 5805;WESTSIDE over Parker Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Stc 5805;WESTSIDE over Parker 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 July 2023.

How much traffic does Stc 5805;WESTSIDE over Parker Creek carry?

About 80 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Stc 5805;WESTSIDE over Parker Creek?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 26 ft wide.

Who owns Stc 5805;WESTSIDE over Parker Creek?

It is owned by the County Highway Agency.