US Bridges

SMA8353;16th Ave over UPRR;1st ST N

Fair

Canyon County, Idaho · In NAMPA;16th Ave · Structure no. 000000000021845

Built
1969
56 years old, rebuilt 2009
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
766 ft
11 main spans
Daily traffic
20,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

SMA8353;16th Ave over UPRR;1st ST N is a steel stringer/multi-beam or girder carrying SMA8353;16th Ave over UPRR;1st ST N in Canyon County, Idaho. It was built in 1969 and reconstructed in 2009, so it is 56 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 20,000 vehicles a day, roughly 2% of them trucks, projected to reach 30,000 by 2042. The structure is 766 ft (233.5 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSMA8353;16th Ave
CrossesUPRR;1st ST N
LocationIn NAMPA;16th Ave
RouteCity Street 8353
CountyCanyon County
StateIdaho
Coordinates43.57633, -116.55511
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.
Last inspectionSeptember 2023
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 alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length766 ft (233.5 m)
Longest span112 ft (34.1 m)
Deck width67 ft (20.4 m)
Roadway width58 ft (17.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2023)
Projected traffic30,000 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 SMA8353;16th Ave over UPRR;1st ST N built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2009.

What condition is SMA8353;16th Ave over UPRR;1st ST N 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 September 2023.

How much traffic does SMA8353;16th Ave over UPRR;1st ST N carry?

About 20,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SMA8353;16th Ave over UPRR;1st ST N?

The structure is 766 ft (233.5 m) long with a longest span of 112 ft (34.1 m) and a deck 67 ft wide.

Who owns SMA8353;16th Ave over UPRR;1st ST N?

It is owned by the City or Municipal Highway Agency.