US Bridges

43-634 over Rio San Antonio

Fair

Sandoval County, New Mexico · 0.01 MI W NM-126 @ MP37.8 · Structure no. 000000000009497

Built
2011
14 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
102
2023 count
Owner
County
County Highway Agency

About this bridge

43-634 over Rio San Antonio is a steel stringer/multi-beam or girder carrying 43-634 over Rio San Antonio in Sandoval County, New Mexico. It was built in 2011, so it is 14 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 102 vehicles a day, projected to reach 138 by 2043. The structure is 81 ft (24.6 m) long and 14 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries43-634
CrossesRio San Antonio
Location0.01 MI W NM-126 @ MP37.8
RouteCounty Highway 43034
CountySandoval County
StateNew Mexico
Coordinates35.87809, -106.64328
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadHL 93
Structure length81 ft (24.6 m)
Longest span79 ft (24.1 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102 (2023)
Projected traffic138 by 2043
Trucks—
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

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$500,000 (2050 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 43-634 over Rio San Antonio built?

It was built in 2011, making it 14 years old in 2025.

What condition is 43-634 over Rio San Antonio 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 2025.

How much traffic does 43-634 over Rio San Antonio carry?

About 102 vehicles per day (2023 count).

How long is 43-634 over Rio San Antonio?

The structure is 81 ft (24.6 m) long with a longest span of 79 ft (24.1 m) and a deck 14 ft wide.

Who owns 43-634 over Rio San Antonio?

It is owned by the County Highway Agency.