US Bridges

NM-402 over Tamparos Creek

Fair

Union County, New Mexico · 5.6 MI S of JCT NM-421 · Structure no. 000000000007001

Built
1969
56 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
244 ft
3 main spans
Daily traffic
189
2023 count
Owner
State
State Highway Agency

About this bridge

NM-402 over Tamparos Creek is a prestressed concrete stringer/multi-beam or girder carrying NM-402 over Tamparos Creek in Union County, New Mexico. It was built in 1969, so it is 56 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 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 189 vehicles a day, roughly 11% of them trucks, projected to reach 257 by 2043. The structure is 244 ft (74.4 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesNM-402
CrossesTamparos Creek
Location5.6 MI S of JCT NM-421
RouteState Highway 402
CountyUnion County
StateNew Mexico
Coordinates36.07074, -103.20329
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length244 ft (74.4 m)
Longest span79 ft (24.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2023)
Projected traffic257 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-402 over Tamparos Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is NM-402 over Tamparos Creek 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 2024.

How much traffic does NM-402 over Tamparos Creek carry?

About 189 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-402 over Tamparos Creek?

The structure is 244 ft (74.4 m) long with a longest span of 79 ft (24.1 m) and a deck 31 ft wide.

Who owns NM-402 over Tamparos Creek?

It is owned by the State Highway Agency.