US Bridges

STC5705;BENEWAH CR over Benewah Creek

Fair

Benewah County, Idaho · 2.6 N. 2.3 E. Benewah · Structure no. 000000000020345

Built
1977
48 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
370
2023 count
Owner
County
County Highway Agency

About this bridge

STC5705;BENEWAH CR over Benewah Creek is a prestressed concrete box beam or girders - multiple carrying STC5705;BENEWAH CR over Benewah Creek in Benewah County, Idaho. It was built in 1977, so it is 48 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 370 vehicles a day, roughly 6% of them trucks, projected to reach 555 by 2042. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

Location

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CarriesSTC5705;BENEWAH CR
CrossesBenewah Creek
Location2.6 N. 2.3 E. Benewah
RouteCounty Highway 5705
CountyBenewah County
StateIdaho
Coordinates47.26886, -116.73514
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating28 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2023)
Projected traffic555 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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$460,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC5705;BENEWAH CR over Benewah Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is STC5705;BENEWAH CR over Benewah 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 STC5705;BENEWAH CR over Benewah Creek carry?

About 370 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is STC5705;BENEWAH CR over Benewah Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns STC5705;BENEWAH CR over Benewah Creek?

It is owned by the County Highway Agency.