US Bridges

FL-4750 over Saiz Arroyo

Fair

Santa Fe County, New Mexico · JCT Delgado/Palace Ave · Structure no. 000000000008012

Built
1977
48 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
2,012
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

FL-4750 over Saiz Arroyo is a concrete slab carrying FL-4750 over Saiz Arroyo in Santa Fe County, New Mexico. It was built in 1977, so it is 48 years old, younger 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 2,012 vehicles a day, roughly 5% of them trucks, projected to reach 2,736 by 2043. The structure is 23 ft (6.9 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFL-4750
CrossesSaiz Arroyo
LocationJCT Delgado/Palace Ave
RouteCity Street 4750
CountySanta Fe County
StateNew Mexico
Coordinates35.68368, -105.92495
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.3 US tons
Inventory rating35.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length23 ft (6.9 m)
Longest span22 ft (6.7 m)
Deck width37 ft (11.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,012 (2023)
Projected traffic2,736 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$51,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FL-4750 over Saiz Arroyo built?

It was built in 1977, making it 48 years old in 2025.

What condition is FL-4750 over Saiz 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 November 2023.

How much traffic does FL-4750 over Saiz Arroyo carry?

About 2,012 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is FL-4750 over Saiz Arroyo?

The structure is 23 ft (6.9 m) long with a longest span of 22 ft (6.7 m) and a deck 37 ft wide.

Who owns FL-4750 over Saiz Arroyo?

It is owned by the City or Municipal Highway Agency.