US Bridges

Stp 7363;AMERICANA over Boise River

Fair

Ada County, Idaho · In Boise;americana Blvd · Structure no. 000000000021506

Built
1994
31 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
313 ft
3 main spans
Daily traffic
12,000
2023 count
Owner
County
County Highway Agency

About this bridge

Stp 7363;AMERICANA over Boise River is a prestressed concrete stringer/multi-beam or girder carrying Stp 7363;AMERICANA over Boise River in Ada County, Idaho. It was built in 1994, so it is 31 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 12,000 vehicles a day, roughly 2% of them trucks, projected to reach 18,000 by 2042. The structure is 313 ft (95.4 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesStp 7363;AMERICANA
CrossesBoise River
LocationIn Boise;americana Blvd
RouteCounty Highway 7363
CountyAda County
StateIdaho
Coordinates43.61525, -116.22222
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 25 or greater
Structure length313 ft (95.4 m)
Longest span93 ft (28.3 m)
Deck width85 ft (26 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2023)
Projected traffic18,000 by 2042
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Stp 7363;AMERICANA over Boise River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Stp 7363;AMERICANA over Boise River 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 August 2023.

How much traffic does Stp 7363;AMERICANA over Boise River carry?

About 12,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Stp 7363;AMERICANA over Boise River?

The structure is 313 ft (95.4 m) long with a longest span of 93 ft (28.3 m) and a deck 85 ft wide.

Who owns Stp 7363;AMERICANA over Boise River?

It is owned by the County Highway Agency.