US Bridges

FL-5661 over Arroyo Hermanos

Fair

San Miguel County, New Mexico · 0.1 MI N of Valencia ST · Structure no. 000000000006342

Built
1911
114 years old, rebuilt 1961
Condition
Fair
inspected April 2024
Type
Channel Beam
Concrete
Length
29 ft
1 main span
Daily traffic
1,548
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

FL-5661 over Arroyo Hermanos is a concrete channel beam carrying FL-5661 over Arroyo Hermanos in San Miguel County, New Mexico. It was built in 1911 and reconstructed in 1961, so it is 114 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 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 1,548 vehicles a day, roughly 5% of them trucks, projected to reach 2,105 by 2043. The structure is 29 ft (8.8 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFL-5661
CrossesArroyo Hermanos
Location0.1 MI N of Valencia ST
RouteCity Street 5661
CountySan Miguel County
StateNew Mexico
Coordinates35.59468, -105.22749
Functional classUrban Collector

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.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width29 ft (8.9 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,548 (2023)
Projected traffic2,105 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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$50,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-5661 over Arroyo Hermanos built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1961.

What condition is FL-5661 over Arroyo Hermanos 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 FL-5661 over Arroyo Hermanos carry?

About 1,548 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is FL-5661 over Arroyo Hermanos?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 29 ft wide.

Who owns FL-5661 over Arroyo Hermanos?

It is owned by the City or Municipal Highway Agency.