US Bridges

NM-97 over Mora River

FairPosted for load

Mora County, New Mexico · 7.6 MI NE of NM-161/NM-97 · Structure no. 000000000004984

Built
1930
95 years old
Condition
Fair
inspected March 2024
Type
Truss - Thru
Steel
Length
232 ft
3 main spans
Daily traffic
37
2023 count
Owner
State
State Highway Agency

About this bridge

NM-97 over Mora River is a steel truss - thru carrying NM-97 over Mora River in Mora County, New Mexico. It was built in 1930, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 37 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2043. The structure is 232 ft (70.7 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNM-97
CrossesMora River
Location7.6 MI NE of NM-161/NM-97
RouteState Highway 97
Coordinates35.81366, -104.86304
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26.6 US tons
Inventory rating15.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans3
Design loadHS 20 + Mod
Structure length232 ft (70.7 m)
Longest span75 ft (22.9 m)
Deck width18 ft (5.5 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2023)
Projected traffic50 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$278,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-97 over Mora River built?

It was built in 1930, making it 95 years old in 2025.

What condition is NM-97 over Mora River 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-97 over Mora River carry?

About 37 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NM-97 over Mora River?

The structure is 232 ft (70.7 m) long with a longest span of 75 ft (22.9 m) and a deck 18 ft wide.

Who owns NM-97 over Mora River?

It is owned by the State Highway Agency.