US Bridges

FR-8402 over Unnamed Waterway

Fair

Rio Arriba County, New Mexico · 1.80 MI N JCT US 285 · Structure no. 000000000003629

Built
1933
92 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
166
2023 count
Owner
State
State Highway Agency

About this bridge

FR-8402 over Unnamed Waterway is a concrete culvert carrying FR-8402 over Unnamed Waterway in Rio Arriba County, New Mexico. It was built in 1933, so it is 92 years old, older 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 32 ft (9.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFR-8402
CrossesUnnamed Waterway
Location1.80 MI N JCT US 285
RouteU.S. Route 8402
CountyRio Arriba County
StateNew Mexico
Coordinates36.09549, -106.13731
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FR-8402 over Unnamed Waterway built?

It was built in 1933, making it 92 years old in 2025.

What condition is FR-8402 over Unnamed Waterway 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 June 2024.

How much traffic does FR-8402 over Unnamed Waterway carry?

About 166 vehicles per day (2023 count).

How long is FR-8402 over Unnamed Waterway?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns FR-8402 over Unnamed Waterway?

It is owned by the State Highway Agency.