US Bridges

39-Z012 over Rio Grande

Fair

Rio Arriba County, New Mexico · 13.75 MI N of JCT NM68/76 · Structure no. 000000000008764

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
157 ft
2 main spans
Daily traffic
166
2023 count
Owner
County
County Highway Agency

About this bridge

39-Z012 over Rio Grande is a prestressed concrete continuous stringer/multi-beam or girder carrying 39-Z012 over Rio Grande in Rio Arriba County, New Mexico. It was built in 1980, so it is 45 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 166 vehicles a day, projected to reach 225 by 2043. The structure is 157 ft (47.9 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries39-Z012
CrossesRio Grande
Location13.75 MI N of JCT NM68/76
RouteCounty Highway 39012
CountyRio Arriba County
StateNew Mexico
Coordinates36.20671, -105.96063
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable 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 length157 ft (47.9 m)
Longest span77 ft (23.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic166 (2023)
Projected traffic225 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 39-Z012 over Rio Grande built?

It was built in 1980, making it 45 years old in 2025.

What condition is 39-Z012 over Rio Grande 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 March 2024.

How much traffic does 39-Z012 over Rio Grande carry?

About 166 vehicles per day (2023 count).

How long is 39-Z012 over Rio Grande?

The structure is 157 ft (47.9 m) long with a longest span of 77 ft (23.5 m) and a deck 27 ft wide.

Who owns 39-Z012 over Rio Grande?

It is owned by the County Highway Agency.