US Bridges

47-004 over Unnamed Waterway

Fair

San Miguel County, New Mexico · 0.1 MI W of NM-94 @MP-3.9 · Structure no. 000000000008222

Built
1974
51 years old
Condition
Fair
inspected December 2024
Type
Other
Steel
Length
40 ft
1 main span
Daily traffic
210
2023 count
Owner
County
County Highway Agency

About this bridge

47-004 over Unnamed Waterway is a steel other carrying 47-004 over Unnamed Waterway in San Miguel County, New Mexico. It was built in 1974, so it is 51 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 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 210 vehicles a day, projected to reach 285 by 2043. The structure is 40 ft (12.2 m) long and 17 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
Carries47-004
CrossesUnnamed Waterway
Location0.1 MI W of NM-94 @MP-3.9
RouteCounty Highway 47004
CountySan Miguel County
StateNew Mexico
Coordinates35.81418, -105.2966
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.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeOther
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width17 ft (5.3 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2023)
Projected traffic285 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$41,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 47-004 over Unnamed Waterway built?

It was built in 1974, making it 51 years old in 2025.

What condition is 47-004 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 December 2024.

How much traffic does 47-004 over Unnamed Waterway carry?

About 210 vehicles per day (2023 count).

How long is 47-004 over Unnamed Waterway?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 17 ft wide.

Who owns 47-004 over Unnamed Waterway?

It is owned by the County Highway Agency.