US Bridges

Stc 8483;DAVIS Ave over Phyllis Canal

Fair

Canyon County, Idaho · In Nampa;davis Ave · Structure no. 000000000027740

Built
1971
54 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
5,400
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stc 8483;DAVIS Ave over Phyllis Canal is a prestressed concrete tee beam carrying Stc 8483;DAVIS Ave over Phyllis Canal in Canyon County, Idaho. It was built in 1971, so it is 54 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 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 5,400 vehicles a day, projected to reach 8,100 by 2042. The structure is 41 ft (12.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesStc 8483;DAVIS Ave
CrossesPhyllis Canal
LocationIn Nampa;davis Ave
RouteCity Street 8483
CountyCanyon County
StateIdaho
Coordinates43.58503, -116.58842
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width42 ft (12.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2023)
Projected traffic8,100 by 2042
Trucks0%
Lanes on structure2
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

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$918,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 8483;DAVIS Ave over Phyllis Canal built?

It was built in 1971, making it 54 years old in 2025.

What condition is Stc 8483;DAVIS Ave over Phyllis Canal 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 Stc 8483;DAVIS Ave over Phyllis Canal carry?

About 5,400 vehicles per day (2023 count).

How long is Stc 8483;DAVIS Ave over Phyllis Canal?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 42 ft wide.

Who owns Stc 8483;DAVIS Ave over Phyllis Canal?

It is owned by the City or Municipal Highway Agency.