US Bridges

SMA8513;ID Cntr RD over Phyllis Canal

Fair

Canyon County, Idaho · 2.5 N. 2.4 E. Nampa · Structure no. 000000000026945

Built
1987
38 years old, rebuilt 2005
Condition
Fair
inspected February 2023
Type
Frame
Concrete
Length
27 ft
1 main span
Daily traffic
26,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

SMA8513;ID Cntr RD over Phyllis Canal is a concrete frame carrying SMA8513;ID Cntr RD over Phyllis Canal in Canyon County, Idaho. It was built in 1987 and reconstructed in 2005, so it is 38 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 26,000 vehicles a day, roughly 2% of them trucks, projected to reach 39,000 by 2042. The structure is 27 ft (8.2 m) long and 101 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA8513;ID Cntr RD
CrossesPhyllis Canal
Location2.5 N. 2.4 E. Nampa
RouteCounty Highway 8513
CountyCanyon County
StateIdaho
Coordinates43.61508, -116.51317
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span27 ft (8.2 m)
Deck width101 ft (30.7 m)
Roadway width84 ft (25.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2023)
Projected traffic39,000 by 2042
Trucks2%
Lanes on structure5
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$752,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SMA8513;ID Cntr RD over Phyllis Canal built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 2005.

What condition is SMA8513;ID Cntr RD 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 SMA8513;ID Cntr RD over Phyllis Canal carry?

About 26,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SMA8513;ID Cntr RD over Phyllis Canal?

The structure is 27 ft (8.2 m) long with a longest span of 27 ft (8.2 m) and a deck 101 ft wide.

Who owns SMA8513;ID Cntr RD over Phyllis Canal?

It is owned by the City or Municipal Highway Agency.