US Bridges

45-3500 over Flora Vista Arroyo

Fair

San Juan County, New Mexico · 0.3 MI S Nm 516 · Structure no. 000000000008111

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
121 ft
3 main spans
Daily traffic
665
2023 count
Owner
County
County Highway Agency

About this bridge

45-3500 over Flora Vista Arroyo is a steel continuous stringer/multi-beam or girder carrying 45-3500 over Flora Vista Arroyo in San Juan County, New Mexico. It was built in 1967, so it is 58 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 665 vehicles a day, projected to reach 904 by 2043. The structure is 121 ft (36.9 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
Carries45-3500
CrossesFlora Vista Arroyo
Location0.3 MI S Nm 516
RouteCounty Highway 45500
CountySan Juan County
StateNew Mexico
Coordinates36.80026, -108.08102
Functional classUrban 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.1 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans3
Design loadH 20
Structure length121 ft (36.9 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic665 (2023)
Projected traffic904 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$300,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 45-3500 over Flora Vista Arroyo built?

It was built in 1967, making it 58 years old in 2025.

What condition is 45-3500 over Flora Vista Arroyo 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 May 2024.

How much traffic does 45-3500 over Flora Vista Arroyo carry?

About 665 vehicles per day (2023 count).

How long is 45-3500 over Flora Vista Arroyo?

The structure is 121 ft (36.9 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns 45-3500 over Flora Vista Arroyo?

It is owned by the County Highway Agency.