US Bridges

I-25 Sbl over US-84-285 under Ramp C

Fair

Santa Fe County, New Mexico · 5.1 M N JCT NM-14/I-25 · Structure no. 000000000007507

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
174 ft
3 main spans
Daily traffic
16,197
2022 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over US-84-285 under Ramp C is a prestressed concrete stringer/multi-beam or girder carrying I-25 Sbl over US-84-285 under Ramp C 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 5 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 16,197 vehicles a day, roughly 5% of them trucks, projected to reach 22,027 by 2042. The structure is 174 ft (53 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Sbl
CrossesUS-84-285 under Ramp C
Location5.1 M N JCT NM-14/I-25
RouteInterstate 25
CountySanta Fe County
StateNew Mexico
Coordinates35.63561, -105.95458
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53 m)
Longest span80 ft (24.4 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,197 (2022)
Projected traffic22,027 by 2042
Trucks5%
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$591,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Sbl over US-84-285 under Ramp C built?

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

What condition is I-25 Sbl over US-84-285 under Ramp C 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 August 2023.

How much traffic does I-25 Sbl over US-84-285 under Ramp C carry?

About 16,197 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is I-25 Sbl over US-84-285 under Ramp C?

The structure is 174 ft (53 m) long with a longest span of 80 ft (24.4 m) and a deck 45 ft wide.

Who owns I-25 Sbl over US-84-285 under Ramp C?

It is owned by the State Highway Agency.