US Bridges

NHS9493;W Park Ctr over Boise River

Fair

Ada County, Idaho · Boise;west Park Ctr Blvd · Structure no. 000000000025898

Built
2001
24 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
601 ft
3 main spans
Daily traffic
10,500
2023 count
Owner
County
County Highway Agency

About this bridge

NHS9493;W Park Ctr over Boise River is a steel continuous stringer/multi-beam or girder carrying NHS9493;W Park Ctr over Boise River 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 10,500 vehicles a day, roughly 3% of them trucks, projected to reach 15,750 by 2042. The structure is 601 ft (183.2 m) long and 99 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNHS9493;W Park Ctr
CrossesBoise River
LocationBoise;west Park Ctr Blvd
RouteCity Street 9493
CountyAda County
StateIdaho
Coordinates43.60131, -116.18856
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length601 ft (183.2 m)
Longest span238 ft (72.5 m)
Deck width99 ft (30.3 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic15,750 by 2042
Trucks3%
Lanes on structure5
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 NHS9493;W Park Ctr over Boise River built?

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

What condition is NHS9493;W Park Ctr 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 NHS9493;W Park Ctr over Boise River carry?

About 10,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is NHS9493;W Park Ctr over Boise River?

The structure is 601 ft (183.2 m) long with a longest span of 238 ft (72.5 m) and a deck 99 ft wide.

Who owns NHS9493;W Park Ctr over Boise River?

It is owned by the County Highway Agency.