US Bridges

Stc 3770;STAR RD over Fivemile Creek

Good

Ada County, Idaho · 3.2 S of Star · Structure no. 000000000034265

Built
2024
1 years old
Condition
Good
inspected June 2024
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
10,500
2022 count
Owner
County
County Highway Agency

About this bridge

Stc 3770;STAR RD over Fivemile Creek is a concrete frame carrying Stc 3770;STAR RD over Fivemile Creek in Ada 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 10,500 vehicles a day, roughly 2% of them trucks, projected to reach 15,750 by 2042. The structure is 25 ft (7.7 m) long and 113 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesStc 3770;STAR RD
CrossesFivemile Creek
Location3.2 S of Star
RouteCounty Highway 3770
StateIdaho
Coordinates43.64501, -116.4935
Functional classRural Minor Arterial

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating92.2 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length25 ft (7.7 m)
Longest span22 ft (6.8 m)
Deck width113 ft (34.4 m)
Roadway width111 ft (33.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2022)
Projected traffic15,750 by 2042
Trucks2%
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 Stc 3770;STAR RD over Fivemile Creek built?

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

What condition is Stc 3770;STAR RD over Fivemile 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 June 2024.

How much traffic does Stc 3770;STAR RD over Fivemile Creek carry?

About 10,500 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Stc 3770;STAR RD over Fivemile Creek?

The structure is 25 ft (7.7 m) long with a longest span of 22 ft (6.8 m) and a deck 113 ft wide.

Who owns Stc 3770;STAR RD over Fivemile Creek?

It is owned by the County Highway Agency.