US Bridges

45-350 over Animas River

Fair

San Juan County, New Mexico · 1.1 Mi. S. of Jct. NM516 · Structure no. 000000000009591

Built
2005
20 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
347 ft
3 main spans
Daily traffic
9,454
2023 count
Owner
County
County Highway Agency

About this bridge

45-350 over Animas River is a prestressed concrete continuous stringer/multi-beam or girder carrying 45-350 over Animas River in San Juan County, New Mexico. It was built in 2005, so it is 20 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 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 9,454 vehicles a day, roughly 12% of them trucks, projected to reach 12,857 by 2043. The structure is 347 ft (105.9 m) long and 63 ft wide.

Location

Open in Google Maps
Carries45-350
CrossesAnimas River
Location1.1 Mi. S. of Jct. NM516
RouteCounty Highway 45003
CountySan Juan County
StateNew Mexico
Coordinates36.7882, -108.0801
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length347 ft (105.9 m)
Longest span114 ft (34.7 m)
Deck width63 ft (19.3 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,454 (2023)
Projected traffic12,857 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$600,000 (2050 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 45-350 over Animas River built?

It was built in 2005, making it 20 years old in 2025.

What condition is 45-350 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 45-350 over Animas River carry?

About 9,454 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is 45-350 over Animas River?

The structure is 347 ft (105.9 m) long with a longest span of 114 ft (34.7 m) and a deck 63 ft wide.

Who owns 45-350 over Animas River?

It is owned by the County Highway Agency.