US Bridges

FL-4923 over Unnamed Waterway

Fair

Otero County, New Mexico · 0.46 MI S of US82/ALAMOGO · Structure no. 000000000002257

Built
1933
92 years old, rebuilt 1955
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
13,298
2023 count
Owner
State
State Highway Agency

About this bridge

FL-4923 over Unnamed Waterway is a concrete culvert carrying FL-4923 over Unnamed Waterway in Otero County, New Mexico. It was built in 1933 and reconstructed in 1955, so it is 92 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.

It carries about 13,298 vehicles a day, roughly 12% of them trucks, projected to reach 18,085 by 2043. The structure is 21 ft (6.4 m) long.

Location

Open in Google Maps
CarriesFL-4923
CrossesUnnamed Waterway
Location0.46 MI S of US82/ALAMOGO
RouteCity Street 4923
CountyOtero County
StateNew Mexico
Coordinates32.93677, -105.96478
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,298 (2023)
Projected traffic18,085 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$168,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-4923 over Unnamed Waterway built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1955.

What condition is FL-4923 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 July 2024.

How much traffic does FL-4923 over Unnamed Waterway carry?

About 13,298 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is FL-4923 over Unnamed Waterway?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns FL-4923 over Unnamed Waterway?

It is owned by the State Highway Agency.