US Bridges

Pr 3 over Santiago River

FairPosted for load

Naguabo Municipio, Puerto Rico · 2.5 KM South of Naguabo · Structure no. E01221

Built
1918
107 years old
Condition
Fair
inspected December 2023
Type
Other
Other
Length
210 ft
1 main span
Daily traffic
4,923
2007 count
Owner
State
State Highway Agency

About this bridge

Pr 3 over Santiago River is a other other carrying Pr 3 over Santiago River in Naguabo Municipio, Puerto Rico. It was built in 1918, so it is 107 years old, older than the Puerto Rico average of 51.2 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. Its operating status is: posted for load restriction.

It carries about 4,923 vehicles a day, roughly 4% of them trucks, projected to reach 15,756 by 2025. The structure is 210 ft (64 m) long and 38 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesPr 3
CrossesSantiago River
Location2.5 KM South of Naguabo
RouteState Highway 3
CountyNaguabo Municipio
StatePuerto Rico
Coordinates18.18833, -65.725
Functional classRural Major 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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10.7 US tons
Inventory rating6.4 US tons

Structure

Structure typeOther
MaterialOther
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length210 ft (64 m)
Longest span23 ft (7.1 m)
Deck width38 ft (11.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,923 (2007)
Projected traffic15,756 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 3 over Santiago River built?

It was built in 1918, making it 107 years old in 2025.

What condition is Pr 3 over Santiago River 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 December 2023.

How much traffic does Pr 3 over Santiago River carry?

About 4,923 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is Pr 3 over Santiago River?

The structure is 210 ft (64 m) long with a longest span of 23 ft (7.1 m) and a deck 38 ft wide.

Who owns Pr 3 over Santiago River?

It is owned by the State Highway Agency.