US Bridges

NM-187 over Trujillo Canyon

Fair

Sierra County, New Mexico · 6.2 MI N of Dona Ana C/L · Structure no. 000000000001666

Built
1929
96 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
202 ft
8 main spans
Daily traffic
1,093
2023 count
Owner
State
State Highway Agency

About this bridge

NM-187 over Trujillo Canyon is a wood or timber stringer/multi-beam or girder carrying NM-187 over Trujillo Canyon in Sierra County, New Mexico. It was built in 1929, so it is 96 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 1,093 vehicles a day, roughly 11% of them trucks, projected to reach 1,486 by 2043. The structure is 202 ft (61.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNM-187
CrossesTrujillo Canyon
Location6.2 MI N of Dona Ana C/L
RouteState Highway 187
CountySierra County
StateNew Mexico
Coordinates32.85193, -107.3197
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans8
Design loadH 15
Structure length202 ft (61.7 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,093 (2023)
Projected traffic1,486 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-187 over Trujillo Canyon built?

It was built in 1929, making it 96 years old in 2025.

What condition is NM-187 over Trujillo Canyon 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 November 2024.

How much traffic does NM-187 over Trujillo Canyon carry?

About 1,093 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-187 over Trujillo Canyon?

The structure is 202 ft (61.7 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns NM-187 over Trujillo Canyon?

It is owned by the State Highway Agency.