US Bridges

31-Z034 over Unnamed Waterway

FairPosted for load

McKinley County, New Mexico · 3.6 MI W NM-602 @ MP-18.6 · Structure no. 000000000008982

Built
1995
30 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
66 ft
4 main spans
Daily traffic
337
2023 count
Owner
County
County Highway Agency

About this bridge

31-Z034 over Unnamed Waterway is a steel continuous stringer/multi-beam or girder carrying 31-Z034 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1995, so it is 30 years old, younger 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 6 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 other load-capacity restriction.

It carries about 337 vehicles a day, projected to reach 458 by 2043. The structure is 66 ft (20 m) long and 13 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
Carries31-Z034
CrossesUnnamed Waterway
Location3.6 MI W NM-602 @ MP-18.6
RouteCounty Highway 31013
CountyMcKinley County
StateNew Mexico
Coordinates35.36782, -108.81515
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckOpen grating
Main spans4
Design loadHS 20
Structure length66 ft (20 m)
Longest span19 ft (5.9 m)
Deck width13 ft (4.1 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic337 (2023)
Projected traffic458 by 2043
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$52,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 31-Z034 over Unnamed Waterway built?

It was built in 1995, making it 30 years old in 2025.

What condition is 31-Z034 over Unnamed Waterway 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 April 2024.

How much traffic does 31-Z034 over Unnamed Waterway carry?

About 337 vehicles per day (2023 count).

How long is 31-Z034 over Unnamed Waterway?

The structure is 66 ft (20 m) long with a longest span of 19 ft (5.9 m) and a deck 13 ft wide.

Who owns 31-Z034 over Unnamed Waterway?

It is owned by the County Highway Agency.