US Bridges

NM-12 over Starkweather Canyon

Poor

Catron County, New Mexico · 4.54 MI NE of JCT US-180 · Structure no. 000000000002209

Built
1939
86 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
96 ft
2 main spans
Daily traffic
979
2023 count
Owner
State
State Highway Agency

About this bridge

NM-12 over Starkweather Canyon is a steel stringer/multi-beam or girder carrying NM-12 over Starkweather Canyon in Catron County, New Mexico. It was built in 1939, so it is 86 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 979 vehicles a day, roughly 11% of them trucks, projected to reach 1,331 by 2043. The structure is 96 ft (29.3 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNM-12
CrossesStarkweather Canyon
Location4.54 MI NE of JCT US-180
RouteState Highway 12
Coordinates33.72392, -108.79393
Functional classRural Minor 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionOctober 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 alignment8: Equal to present desirable criteria
Operating rating36.9 US tons
Inventory rating21.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length96 ft (29.3 m)
Longest span45 ft (13.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic979 (2023)
Projected traffic1,331 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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$520,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-12 over Starkweather Canyon built?

It was built in 1939, making it 86 years old in 2025.

What condition is NM-12 over Starkweather Canyon 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 October 2024.

How much traffic does NM-12 over Starkweather Canyon carry?

About 979 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-12 over Starkweather Canyon?

The structure is 96 ft (29.3 m) long with a longest span of 45 ft (13.7 m) and a deck 30 ft wide.

Who owns NM-12 over Starkweather Canyon?

It is owned by the State Highway Agency.