US Bridges

S3890;W Indian Vly over Grays Creek

Good

Adams County, Idaho · 2.7N 2.4W Indian Valley · Structure no. 000000000020036

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
160
2023 count
Owner
County
County Highway Agency

About this bridge

S3890;W Indian Vly over Grays Creek is a prestressed concrete box beam or girders - multiple carrying S3890;W Indian Vly over Grays Creek in Adams County, Idaho. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 160 vehicles a day, roughly 13% of them trucks, projected to reach 240 by 2042. The structure is 50 ft (15.1 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesS3890;W Indian Vly
CrossesGrays Creek
Location2.7N 2.4W Indian Valley
RouteCounty Highway 3890
StateIdaho
Coordinates44.59639, -116.48203
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating46 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length50 ft (15.1 m)
Longest span47 ft (14.2 m)
Deck width29 ft (8.9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic240 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 S3890;W Indian Vly over Grays Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is S3890;W Indian Vly over Grays 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 November 2024.

How much traffic does S3890;W Indian Vly over Grays Creek carry?

About 160 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is S3890;W Indian Vly over Grays Creek?

The structure is 50 ft (15.1 m) long with a longest span of 47 ft (14.2 m) and a deck 29 ft wide.

Who owns S3890;W Indian Vly over Grays Creek?

It is owned by the County Highway Agency.