US Bridges

Stc 3888;SUPERIOR over Rush Creek

Good

Washington County, Idaho · In Cambridge · Structure no. 000000000028848

Built
2009
16 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
310
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3888;SUPERIOR over Rush Creek is a prestressed concrete tee beam carrying Stc 3888;SUPERIOR over Rush Creek in Washington County, Idaho. It was built in 2009, so it is 16 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 310 vehicles a day, roughly 63% of them trucks, projected to reach 465 by 2042. The structure is 51 ft (15.5 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesStc 3888;SUPERIOR
CrossesRush Creek
LocationIn Cambridge
RouteCity Street 3888
StateIdaho
Coordinates44.5745, -116.67311
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length51 ft (15.5 m)
Longest span48 ft (14.6 m)
Deck width36 ft (11 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2023)
Projected traffic465 by 2042
Trucks63%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 3888;SUPERIOR over Rush Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Stc 3888;SUPERIOR over Rush 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 2023.

How much traffic does Stc 3888;SUPERIOR over Rush Creek carry?

About 310 vehicles per day (2023 count), of which roughly 63% are trucks.

How long is Stc 3888;SUPERIOR over Rush Creek?

The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 36 ft wide.

Who owns Stc 3888;SUPERIOR over Rush Creek?

It is owned by the County Highway Agency.