US Bridges

FL-4685 over Unnamed Waterway

Fair

Chaves County, New Mexico · 4.2 M S JCT US70/380-285 · Structure no. 000000000005554

Built
1947
78 years old, rebuilt 1997
Condition
Fair
inspected February 2022
Type
Culvert
Concrete
Length
42 ft
7 main spans
Daily traffic
11,202
2023 count
Owner
State
State Highway Agency

About this bridge

FL-4685 over Unnamed Waterway is a concrete culvert carrying FL-4685 over Unnamed Waterway in Chaves County, New Mexico. It was built in 1947 and reconstructed in 1997, so it is 78 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 11,202 vehicles a day, roughly 17% of them trucks, projected to reach 15,234 by 2043. The structure is 42 ft (12.8 m) long.

Location

Open in Google Maps
CarriesFL-4685
CrossesUnnamed Waterway
Location4.2 M S JCT US70/380-285
RouteU.S. Route 4685
CountyChaves County
StateNew Mexico
Coordinates33.33561, -104.50575
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 inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,202 (2023)
Projected traffic15,234 by 2043
Trucks17%
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$30,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-4685 over Unnamed Waterway built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1997.

What condition is FL-4685 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 February 2022.

How much traffic does FL-4685 over Unnamed Waterway carry?

About 11,202 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is FL-4685 over Unnamed Waterway?

The structure is 42 ft (12.8 m) long with a longest span of 6 ft (1.8 m).

Who owns FL-4685 over Unnamed Waterway?

It is owned by the State Highway Agency.