US Bridges

I-25 Nbl over US-84-285

Fair

Santa Fe County, New Mexico · Junction I-25/ST Francis · Structure no. 000000000007503

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
284 ft
4 main spans
Daily traffic
15,535
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over US-84-285 is a prestressed concrete stringer/multi-beam or girder carrying I-25 Nbl over US-84-285 in Santa Fe County, New Mexico. It was built in 1974, so it is 51 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 15,535 vehicles a day, roughly 14% of them trucks, projected to reach 21,127 by 2043. The structure is 284 ft (86.6 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Nbl
CrossesUS-84-285
LocationJunction I-25/ST Francis
RouteInterstate 25
CountySanta Fe County
StateNew Mexico
Coordinates35.6343, -105.9561
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.6 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span93 ft (28.3 m)
Deck width52 ft (15.8 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,535 (2023)
Projected traffic21,127 by 2043
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$300,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl over US-84-285 built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-25 Nbl over US-84-285 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 September 2023.

How much traffic does I-25 Nbl over US-84-285 carry?

About 15,535 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I-25 Nbl over US-84-285?

The structure is 284 ft (86.6 m) long with a longest span of 93 ft (28.3 m) and a deck 52 ft wide.

Who owns I-25 Nbl over US-84-285?

It is owned by the State Highway Agency.