New Mexico RD 511 over Navajo Dam Spillway
FairSan Juan County, New Mexico · 25 MI E of Farmington Nm · Structure no. 0405-711
- Built
- 1942
- 83 years old
- Condition
- Fair
- inspected November 2023
- Type
- Tee Beam
- Concrete
- Length
- 140 ft
- 3 main spans
- Daily traffic
- 800
- 2006 count
- Owner
- Federal
- Bureau of Reclamation
About this bridge
New Mexico RD 511 over Navajo Dam Spillway is a concrete tee beam carrying New Mexico RD 511 over Navajo Dam Spillway in San Juan County, New Mexico. It was built in 1942, so it is 83 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 800 vehicles a day, roughly 50% of them trucks, projected to reach 800 by 2035. The structure is 140 ft (42.7 m) long and 31 ft wide. If it were closed, the detour would be 80.2 mi (129 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was New Mexico RD 511 over Navajo Dam Spillway built?
It was built in 1942, making it 83 years old in 2025.
What condition is New Mexico RD 511 over Navajo Dam Spillway 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 November 2023.
How much traffic does New Mexico RD 511 over Navajo Dam Spillway carry?
About 800 vehicles per day (2006 count), of which roughly 50% are trucks.
How long is New Mexico RD 511 over Navajo Dam Spillway?
The structure is 140 ft (42.7 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.
Who owns New Mexico RD 511 over Navajo Dam Spillway?
It is owned by the Bureau of Reclamation and maintained by the State Highway Agency.