US Bridges

IRR BIA RTE N4055 over Gaagii Wash

Fair

San Juan County, New Mexico · 7.2M S 4.0M W Farmington · Structure no. 00000000000N819

Built
1985
40 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
1 main span
Daily traffic
269
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N4055 over Gaagii Wash is a steel stringer/multi-beam or girder carrying IRR BIA RTE N4055 over Gaagii Wash in San Juan County, New Mexico. It was built in 1985, so it is 40 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 269 vehicles a day, roughly 7% of them trucks, projected to reach 227 by 2033. The structure is 61 ft (18.6 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N4055
CrossesGaagii Wash
Location7.2M S 4.0M W Farmington
RouteFederal Lands Road 4055
CountySan Juan County
StateNew Mexico
Coordinates36.62283, -108.27078
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span59 ft (17.9 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic269 (2023)
Projected traffic227 by 2033
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE N4055 over Gaagii Wash built?

It was built in 1985, making it 40 years old in 2025.

What condition is IRR BIA RTE N4055 over Gaagii Wash 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 2023.

How much traffic does IRR BIA RTE N4055 over Gaagii Wash carry?

About 269 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is IRR BIA RTE N4055 over Gaagii Wash?

The structure is 61 ft (18.6 m) long with a longest span of 59 ft (17.9 m) and a deck 33 ft wide.

Who owns IRR BIA RTE N4055 over Gaagii Wash?

It is owned by the Bureau of Indian Affairs.