US Bridges

IRR BIA RTE 39 over Navajo River

PoorPosted for load

Rio Arriba County, New Mexico · 6.6 KM NW of Dulce Nm · Structure no. 00000000000M302

Built
1973
52 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
30
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 39 over Navajo River is a steel stringer/multi-beam or girder carrying IRR BIA RTE 39 over Navajo River in Rio Arriba County, New Mexico. It was built in 1973, so it is 52 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 5% of them trucks, projected to reach 35 by 2043. The structure is 63 ft (19.3 m) long and 12 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIRR BIA RTE 39
CrossesNavajo River
Location6.6 KM NW of Dulce Nm
RouteFederal Lands Road 39
Coordinates36.94832, -107.07195
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating21.3 US tons
Inventory rating12.9 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length63 ft (19.3 m)
Longest span58 ft (17.8 m)
Deck width12 ft (3.6 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic35 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 39 over Navajo River built?

It was built in 1973, making it 52 years old in 2025.

What condition is IRR BIA RTE 39 over Navajo River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does IRR BIA RTE 39 over Navajo River carry?

About 30 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR BIA RTE 39 over Navajo River?

The structure is 63 ft (19.3 m) long with a longest span of 58 ft (17.8 m) and a deck 12 ft wide.

Who owns IRR BIA RTE 39 over Navajo River?

It is owned by the Bureau of Indian Affairs.