US Bridges

SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic

Fair

Ada County, Idaho · In Boise;federal Way · Structure no. 000000000021675

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
339 ft
4 main spans
Daily traffic
24,000
2023 count
Owner
State
State Highway Agency

About this bridge

SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic is a prestressed concrete stringer/multi-beam or girder carrying SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic in Ada County, Idaho. It was built in 1970, so it is 55 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 24,000 vehicles a day, roughly 4% of them trucks, projected to reach 36,000 by 2042. The structure is 339 ft (103.3 m) long and 73 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA7553;FEDERAL Wy
CrossesUS 20 26;FEDERAL Way Ic
LocationIn Boise;federal Way
RouteCounty Highway 7553
CountyAda County
StateIdaho
Coordinates43.57447, -116.19331
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length339 ft (103.3 m)
Longest span96 ft (29.4 m)
Deck width73 ft (22.2 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,000 (2023)
Projected traffic36,000 by 2042
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.1 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic built?

It was built in 1970, making it 55 years old in 2025.

What condition is SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic 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 February 2023.

How much traffic does SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic carry?

About 24,000 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic?

The structure is 339 ft (103.3 m) long with a longest span of 96 ft (29.4 m) and a deck 73 ft wide.

Who owns SMA7553;FEDERAL Wy over US 20 26;FEDERAL Way Ic?

It is owned by the State Highway Agency.