US Bridges

NM-21 over Rayado Creek

Poor

Colfax County, New Mexico · 11.2 MI S of JCT US-64 · Structure no. 000000000001190

Built
1965
60 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
61 ft
2 main spans
Daily traffic
103
2023 count
Owner
State
State Highway Agency

About this bridge

NM-21 over Rayado Creek is a wood or timber stringer/multi-beam or girder carrying NM-21 over Rayado Creek in Colfax County, New Mexico. It was built in 1965, so it is 60 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 103 vehicles a day, roughly 11% of them trucks, projected to reach 140 by 2043. The structure is 61 ft (18.6 m) long and 32 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesNM-21
CrossesRayado Creek
Location11.2 MI S of JCT US-64
RouteState Highway 21
Coordinates36.36841, -104.92955
Functional classRural Minor Collector

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating34 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length61 ft (18.6 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103 (2023)
Projected traffic140 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$500,000 (2040 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-21 over Rayado Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is NM-21 over Rayado Creek 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 September 2024.

How much traffic does NM-21 over Rayado Creek carry?

About 103 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-21 over Rayado Creek?

The structure is 61 ft (18.6 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns NM-21 over Rayado Creek?

It is owned by the State Highway Agency.