US Bridges

31-Z017 over Unnamed Waterway

FairPosted for load

McKinley County, New Mexico · 1.1 Mi. No. of W. Maloney · Structure no. 000000000008872

Built
1950
75 years old
Condition
Fair
inspected April 2024
Type
Channel Beam
Concrete
Length
25 ft
1 main span
Daily traffic
338
2023 count
Owner
County
County Highway Agency

About this bridge

31-Z017 over Unnamed Waterway is a concrete channel beam carrying 31-Z017 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1950, so it is 75 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 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 338 vehicles a day, projected to reach 459 by 2043. The structure is 25 ft (7.6 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries31-Z017
CrossesUnnamed Waterway
Location1.1 Mi. No. of W. Maloney
RouteCounty Highway 31017
CountyMcKinley County
StateNew Mexico
Coordinates35.5424, -108.771
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.9 US tons
Inventory rating25 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic338 (2023)
Projected traffic459 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$35,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 31-Z017 over Unnamed Waterway built?

It was built in 1950, making it 75 years old in 2025.

What condition is 31-Z017 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-Z017 over Unnamed Waterway carry?

About 338 vehicles per day (2023 count).

How long is 31-Z017 over Unnamed Waterway?

The structure is 25 ft (7.6 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns 31-Z017 over Unnamed Waterway?

It is owned by the County Highway Agency.