US Bridges

IRR/NM-147 over Rio Grande

Fair

Bernalillo County, New Mexico · 1.0 MI E of NM-314/ISLETA · Structure no. 000000000007510

Built
1975
50 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
657 ft
12 main spans
Daily traffic
3,893
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/NM-147 over Rio Grande is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR/NM-147 over Rio Grande in Bernalillo County, New Mexico. It was built in 1975, so it is 50 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 3,893 vehicles a day, roughly 5% of them trucks, projected to reach 5,294 by 2043. The structure is 657 ft (200.3 m) long and 51 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIRR/NM-147
CrossesRio Grande
Location1.0 MI E of NM-314/ISLETA
RouteState Highway 147
CountyBernalillo County
StateNew Mexico
Coordinates34.90633, -106.68508
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length657 ft (200.3 m)
Longest span57 ft (17.4 m)
Deck width51 ft (15.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,893 (2023)
Projected traffic5,294 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.9 mi (24 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR/NM-147 over Rio Grande built?

It was built in 1975, making it 50 years old in 2025.

What condition is IRR/NM-147 over Rio Grande 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/NM-147 over Rio Grande carry?

About 3,893 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR/NM-147 over Rio Grande?

The structure is 657 ft (200.3 m) long with a longest span of 57 ft (17.4 m) and a deck 51 ft wide.

Who owns IRR/NM-147 over Rio Grande?

It is owned by the State Highway Agency.