US Bridges

Duck Lane over Mora Canal

Fair

Canyon County, Idaho · 3.8 S. 4.3 W. Nampa · Structure no. 000000000026845

Built
1983
42 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
50
2023 count
Owner
Local
Other Local Agency

About this bridge

Duck Lane over Mora Canal is a prestressed concrete tee beam carrying Duck Lane over Mora Canal in Canyon County, Idaho. It was built in 1983, so it is 42 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2039. The structure is 28 ft (8.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDuck Lane
CrossesMora Canal
Location3.8 S. 4.3 W. Nampa
RouteCounty Highway 0
CountyCanyon County
StateIdaho
Coordinates43.52353, -116.64892
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks10%
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

OwnerOther Local Agency
Maintained byOther Local 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 Duck Lane over Mora Canal built?

It was built in 1983, making it 42 years old in 2025.

What condition is Duck Lane over Mora 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 Duck Lane over Mora Canal carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Duck Lane over Mora Canal?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Duck Lane over Mora Canal?

It is owned by the Other Local Agency.