US Bridges

FL-4359 over Animas River

Fair

San Juan County, New Mexico · 0.5 MI S. of US-64 · Structure no. 000000000008919

Built
1995
30 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
224 ft
2 main spans
Daily traffic
4,042
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

FL-4359 over Animas River is a prestressed concrete continuous stringer/multi-beam or girder carrying FL-4359 over Animas River in San Juan County, New Mexico. It was built in 1995, so it is 30 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 4,042 vehicles a day, roughly 5% of them trucks, projected to reach 5,497 by 2043. The structure is 224 ft (68.4 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFL-4359
CrossesAnimas River
Location0.5 MI S. of US-64
RouteCity Street 4359
CountySan Juan County
StateNew Mexico
Coordinates36.72041, -108.2027
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length224 ft (68.4 m)
Longest span111 ft (33.8 m)
Deck width61 ft (18.6 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,042 (2023)
Projected traffic5,497 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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-4359 over Animas River built?

It was built in 1995, making it 30 years old in 2025.

What condition is FL-4359 over Animas River 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 January 2024.

How much traffic does FL-4359 over Animas River carry?

About 4,042 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is FL-4359 over Animas River?

The structure is 224 ft (68.4 m) long with a longest span of 111 ft (33.8 m) and a deck 61 ft wide.

Who owns FL-4359 over Animas River?

It is owned by the City or Municipal Highway Agency.