US Bridges

Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext

Fair

Canyon County, Idaho · In Nampa · Structure no. 000000000027342

Built
1994
31 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
5,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext is a concrete frame carrying Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext in Canyon 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 5 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 5,300 vehicles a day, roughly 12% of them trucks, projected to reach 7,950 by 2042. The structure is 26 ft (7.9 m) long and 65 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesStc 8433;11th Ave
CrossesPhyllis CNL;11th Ave Ext
LocationIn Nampa
RouteCity Street 8433
CountyCanyon County
StateIdaho
Coordinates43.60822, -116.53231
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width65 ft (19.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2023)
Projected traffic7,950 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$523,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext built?

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

What condition is Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext 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 March 2023.

How much traffic does Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext carry?

About 5,300 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 65 ft wide.

Who owns Stc 8433;11th Ave over Phyllis CNL;11th Ave Ext?

It is owned by the City or Municipal Highway Agency.