US Bridges

N 4525 E over Marysville Canal

Fair

Fremont County, Idaho · 8.4 E. Marysville · Structure no. 000000000031956

Built
1991
34 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
180
2023 count
Owner
County
County Highway Agency

About this bridge

N 4525 E over Marysville Canal is a prestressed concrete tee beam carrying N 4525 E over Marysville Canal in Fremont County, Idaho. It was built in 1991, so it is 34 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 180 vehicles a day, roughly 10% of them trucks, projected to reach 270 by 2039. The structure is 49 ft (14.9 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesN 4525 E
CrossesMarysville Canal
Location8.4 E. Marysville
RouteCounty Highway 0
StateIdaho
Coordinates44.07019, -111.24533
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2023)
Projected traffic270 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 N 4525 E over Marysville Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is N 4525 E over Marysville 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 October 2024.

How much traffic does N 4525 E over Marysville Canal carry?

About 180 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is N 4525 E over Marysville Canal?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 33 ft wide.

Who owns N 4525 E over Marysville Canal?

It is owned by the County Highway Agency.