US Bridges

Stc 5806;RIVERSIDE over Deep Creek

Fair

Boundary County, Idaho · 0.7N. 3.2W. Bonners Ferry · Structure no. 000000000020745

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
180 ft
2 main spans
Daily traffic
370
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 5806;RIVERSIDE over Deep Creek is a prestressed concrete tee beam carrying Stc 5806;RIVERSIDE over Deep Creek in Boundary County, Idaho. It was built in 1975, so it is 50 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 16% of them trucks, projected to reach 555 by 2042. The structure is 180 ft (54.9 m) long and 34 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesStc 5806;RIVERSIDE
CrossesDeep Creek
Location0.7N. 3.2W. Bonners Ferry
RouteCounty Highway 5806
CountyBoundary County
StateIdaho
Coordinates48.70619, -116.38447
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.
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span89 ft (27.1 m)
Deck width34 ft (10.4 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2023)
Projected traffic555 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 5806;RIVERSIDE over Deep Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Stc 5806;RIVERSIDE over Deep 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 2024.

How much traffic does Stc 5806;RIVERSIDE over Deep Creek carry?

About 370 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Stc 5806;RIVERSIDE over Deep Creek?

The structure is 180 ft (54.9 m) long with a longest span of 89 ft (27.1 m) and a deck 34 ft wide.

Who owns Stc 5806;RIVERSIDE over Deep Creek?

It is owned by the County Highway Agency.