US Bridges

STC5907;DEEP Crk over Deep Creek

Fair

Boundary County, Idaho · 1.0 N. 0.2 W. Naples · Structure no. 000000000030360

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
57 ft
1 main span
Daily traffic
570
2023 count
Owner
County
County Highway Agency

About this bridge

STC5907;DEEP Crk over Deep Creek is a concrete tee beam carrying STC5907;DEEP Crk 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 570 vehicles a day, roughly 10% of them trucks, projected to reach 855 by 2042. The structure is 57 ft (17.4 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesSTC5907;DEEP Crk
CrossesDeep Creek
Location1.0 N. 0.2 W. Naples
RouteCounty Highway 5907
CountyBoundary County
StateIdaho
Coordinates48.58703, -116.39861
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2023)
Projected traffic855 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$594,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC5907;DEEP Crk over Deep Creek built?

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

What condition is STC5907;DEEP Crk 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 June 2023.

How much traffic does STC5907;DEEP Crk over Deep Creek carry?

About 570 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is STC5907;DEEP Crk over Deep Creek?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns STC5907;DEEP Crk over Deep Creek?

It is owned by the County Highway Agency.