US Bridges

Eyrie Way over Sand Creek

Fair

Ada County, Idaho · In Boise · Structure no. 000000000033455

Built
2001
24 years old
Condition
Fair
inspected March 2021
Type
Frame
Concrete
Length
30 ft
1 main span
Daily traffic
350
2023 count
Owner
County
County Highway Agency

About this bridge

Eyrie Way over Sand Creek is a concrete frame carrying Eyrie Way over Sand Creek in Ada County, Idaho. It was built in 2001, so it is 24 years old, younger 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 6 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 350 vehicles a day, roughly 10% of them trucks, projected to reach 525 by 2039. The structure is 30 ft (9.1 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesEyrie Way
CrossesSand Creek
LocationIn Boise
RouteCity Street 0
StateIdaho
Coordinates43.66312, -116.21706
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating95 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2023)
Projected traffic525 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Eyrie Way over Sand Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is Eyrie Way over Sand 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 March 2021.

How much traffic does Eyrie Way over Sand Creek carry?

About 350 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Eyrie Way over Sand Creek?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 60 ft wide.

Who owns Eyrie Way over Sand Creek?

It is owned by the County Highway Agency.