US Bridges

FL-4704 over Rio Hondo

Fair

Chaves County, New Mexico · 1.2 Mi. S Jct. US70/380 · Structure no. 000000000009147

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Channel Beam
Concrete
Length
28 ft
1 main span
Daily traffic
8,558
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

FL-4704 over Rio Hondo is a concrete channel beam carrying FL-4704 over Rio Hondo in Chaves County, New Mexico. It was built in 1972, so it is 53 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 8,558 vehicles a day, roughly 5% of them trucks, projected to reach 11,638 by 2043. The structure is 28 ft (8.5 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFL-4704
CrossesRio Hondo
Location1.2 Mi. S Jct. US70/380
RouteCity Street 4704
CountyChaves County
StateNew Mexico
Coordinates33.37579, -104.54117
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating53.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width48 ft (14.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,558 (2023)
Projected traffic11,638 by 2043
Trucks5%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$114,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-4704 over Rio Hondo built?

It was built in 1972, making it 53 years old in 2025.

What condition is FL-4704 over Rio Hondo 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 September 2024.

How much traffic does FL-4704 over Rio Hondo carry?

About 8,558 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is FL-4704 over Rio Hondo?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 48 ft wide.

Who owns FL-4704 over Rio Hondo?

It is owned by the City or Municipal Highway Agency.