US Bridges

US 30 over I 184B Wb-Eb;fairview Rp

Fair

Ada County, Idaho · In Boise;fairview Ramp · Structure no. 000000000013530

Built
1968
57 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Concrete
Length
235 ft
4 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over I 184B Wb-Eb;fairview Rp is a concrete box beam or girders - single or spread carrying US 30 over I 184B Wb-Eb;fairview Rp in Ada County, Idaho. It was built in 1968, so it is 57 years old, older 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 10,500 vehicles a day, projected to reach 15,750 by 2042. The structure is 235 ft (71.6 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30
CrossesI 184B Wb-Eb;fairview Rp
LocationIn Boise;fairview Ramp
RouteU.S. Route 30
CountyAda County
StateIdaho
Coordinates43.61828, -116.24911
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span83 ft (25.3 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic15,750 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 30 over I 184B Wb-Eb;fairview Rp built?

It was built in 1968, making it 57 years old in 2025.

What condition is US 30 over I 184B Wb-Eb;fairview Rp 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 November 2024.

How much traffic does US 30 over I 184B Wb-Eb;fairview Rp carry?

About 10,500 vehicles per day (2023 count).

How long is US 30 over I 184B Wb-Eb;fairview Rp?

The structure is 235 ft (71.6 m) long with a longest span of 83 ft (25.3 m) and a deck 25 ft wide.

Who owns US 30 over I 184B Wb-Eb;fairview Rp?

It is owned by the State Highway Agency.