US Bridges

Flint Creek Road over N.Fk.Boulder Creek

Good

Owyhee County, Idaho · 29.0 W. Oreana · Structure no. 000000000028271

Built
2023
2 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Flint Creek Road over N.Fk.Boulder Creek is a steel stringer/multi-beam or girder carrying Flint Creek Road over N.Fk.Boulder Creek in Owyhee County, Idaho. It was built in 2023, so it is 2 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, roughly 5% of them trucks, projected to reach 45 by 2042. The structure is 57 ft (17.3 m) long and 26 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesFlint Creek Road
CrossesN.Fk.Boulder Creek
Location29.0 W. Oreana
RouteCounty Highway 0
CountyOwyhee County
StateIdaho
Coordinates42.85111, -116.72228
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length57 ft (17.3 m)
Longest span55 ft (16.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 Flint Creek Road over N.Fk.Boulder Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Flint Creek Road over N.Fk.Boulder Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Flint Creek Road over N.Fk.Boulder Creek carry?

About 30 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Flint Creek Road over N.Fk.Boulder Creek?

The structure is 57 ft (17.3 m) long with a longest span of 55 ft (16.8 m) and a deck 26 ft wide.

Who owns Flint Creek Road over N.Fk.Boulder Creek?

It is owned by the County Highway Agency.