US Bridges

FL-4425 over Rio Puerco

Fair

McKinley County, New Mexico · 0.1 MI N of NM-118/GALLUP · Structure no. 000000000007542

Built
1977
48 years old
Condition
Fair
inspected April 2024
Type
Slab
Prestressed Concrete Continuous
Length
150 ft
2 main spans
Daily traffic
3,889
2023 count
Owner
State
State Highway Agency

About this bridge

FL-4425 over Rio Puerco is a prestressed concrete continuous slab carrying FL-4425 over Rio Puerco in McKinley County, New Mexico. It was built in 1977, so it is 48 years old, younger than the New Mexico average of 51.5 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 3,889 vehicles a day, roughly 13% of them trucks, projected to reach 5,289 by 2043. The structure is 150 ft (45.7 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFL-4425
CrossesRio Puerco
Location0.1 MI N of NM-118/GALLUP
RouteState Highway 4425
Coordinates35.53013, -108.74372
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.5 US tons
Inventory rating68 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span74 ft (22.6 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,889 (2023)
Projected traffic5,289 by 2043
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FL-4425 over Rio Puerco built?

It was built in 1977, making it 48 years old in 2025.

What condition is FL-4425 over Rio Puerco 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 April 2024.

How much traffic does FL-4425 over Rio Puerco carry?

About 3,889 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FL-4425 over Rio Puerco?

The structure is 150 ft (45.7 m) long with a longest span of 74 ft (22.6 m) and a deck 52 ft wide.

Who owns FL-4425 over Rio Puerco?

It is owned by the State Highway Agency.