US Bridges

STC8373;CANYON St. over Phyllis Canal

Good

Canyon County, Idaho · In Nampa · Structure no. 000000000027676

Built
2003
22 years old
Condition
Good
inspected February 2023
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
4,600
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

STC8373;CANYON St. over Phyllis Canal is a concrete frame carrying STC8373;CANYON St. over Phyllis Canal in Canyon County, Idaho. It was built in 2003, so it is 22 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,600 vehicles a day, roughly 1% of them trucks, projected to reach 6,900 by 2042. The structure is 26 ft (7.9 m) long and 117 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSTC8373;CANYON St.
CrossesPhyllis Canal
LocationIn Nampa
RouteCity Street 8373
CountyCanyon County
StateIdaho
Coordinates43.58817, -116.57811
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width117 ft (35.8 m)
Roadway width73 ft (22.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic6,900 by 2042
Trucks1%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was STC8373;CANYON St. over Phyllis Canal built?

It was built in 2003, making it 22 years old in 2025.

What condition is STC8373;CANYON St. over Phyllis Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does STC8373;CANYON St. over Phyllis Canal carry?

About 4,600 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is STC8373;CANYON St. over Phyllis Canal?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 117 ft wide.

Who owns STC8373;CANYON St. over Phyllis Canal?

It is owned by the City or Municipal Highway Agency.