US Bridges

FL-4018 over I-25 Nb/Sb

Poor

Bernalillo County, New Mexico · I-25/MONTGOMERY Blvd · Structure no. 000000000006261

Built
1961
64 years old, rebuilt 1988
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
225 ft
4 main spans
Daily traffic
42,600
2023 count
Owner
State
State Highway Agency

About this bridge

FL-4018 over I-25 Nb/Sb is a prestressed concrete continuous stringer/multi-beam or girder carrying FL-4018 over I-25 Nb/Sb in Bernalillo County, New Mexico. It was built in 1961 and reconstructed in 1988, so it is 64 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.

It carries about 42,600 vehicles a day, roughly 13% of them trucks, projected to reach 57,936 by 2043. The structure is 225 ft (68.6 m) long and 89 ft wide.

Location

Open in Google Maps
CarriesFL-4018
CrossesI-25 Nb/Sb
LocationI-25/MONTGOMERY Blvd
RouteCity Street 4018
CountyBernalillo County
StateNew Mexico
Coordinates35.13272, -106.60979
Functional classUrban Other Principal Arterial

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.6 US tons
Inventory rating20.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span74 ft (22.6 m)
Deck width89 ft (27.1 m)
Roadway width83 ft (25.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,600 (2023)
Projected traffic57,936 by 2043
Trucks13%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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$1.5 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-4018 over I-25 Nb/Sb built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1988.

What condition is FL-4018 over I-25 Nb/Sb 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 January 2025.

How much traffic does FL-4018 over I-25 Nb/Sb carry?

About 42,600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FL-4018 over I-25 Nb/Sb?

The structure is 225 ft (68.6 m) long with a longest span of 74 ft (22.6 m) and a deck 89 ft wide.

Who owns FL-4018 over I-25 Nb/Sb?

It is owned by the State Highway Agency.