US Bridges

Sma 8233;MIDLAND B over Phyllis Canal

Fair

Canyon County, Idaho · N Nampa;midland Blvd. · Structure no. 000000000021830

Built
1973
52 years old, rebuilt 1981
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
22 ft
1 main span
Daily traffic
8,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sma 8233;MIDLAND B over Phyllis Canal is a prestressed concrete tee beam carrying Sma 8233;MIDLAND B over Phyllis Canal in Canyon County, Idaho. It was built in 1973 and reconstructed in 1981, so it is 52 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 8,300 vehicles a day, roughly 2% of them trucks, projected to reach 12,450 by 2042. The structure is 22 ft (6.7 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSma 8233;MIDLAND B
CrossesPhyllis Canal
LocationN Nampa;midland Blvd.
RouteCity Street 8233
CountyCanyon County
StateIdaho
Coordinates43.58111, -116.59308
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 loadHS 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width66 ft (20 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,300 (2023)
Projected traffic12,450 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$728,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 8233;MIDLAND B over Phyllis Canal built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1981.

What condition is Sma 8233;MIDLAND B 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 Sma 8233;MIDLAND B over Phyllis Canal carry?

About 8,300 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sma 8233;MIDLAND B over Phyllis Canal?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 66 ft wide.

Who owns Sma 8233;MIDLAND B over Phyllis Canal?

It is owned by the City or Municipal Highway Agency.