US Bridges

Pr 31 over Gurabo River

FairPosted for load

Las Piedras Municipio, Puerto Rico · 5 KM North of Las Piedras · Structure no. 016511

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
80 ft
2 main spans
Daily traffic
7,800
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 31 over Gurabo River is a concrete continuous slab carrying Pr 31 over Gurabo River in Las Piedras Municipio, Puerto Rico. It was built in 1980, so it is 45 years old, younger 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 5 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 7,800 vehicles a day, roughly 4% of them trucks, projected to reach 10,600 by 2025. The structure is 80 ft (24.4 m) long and 50 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesPr 31
CrossesGurabo River
Location5 KM North of Las Piedras
RouteState Highway 31
CountyLas Piedras Municipio
StatePuerto Rico
Coordinates18.22808, -65.85793
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating29.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span39 ft (11.9 m)
Deck width50 ft (15.1 m)
Roadway width46 ft (14.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,800 (2017)
Projected traffic10,600 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 km)
TollOn a free road
National Highway SystemNo

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$227,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 31 over Gurabo River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Pr 31 over Gurabo 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 March 2023.

How much traffic does Pr 31 over Gurabo River carry?

About 7,800 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 31 over Gurabo River?

The structure is 80 ft (24.4 m) long with a longest span of 39 ft (11.9 m) and a deck 50 ft wide.

Who owns Pr 31 over Gurabo River?

It is owned by the State Highway Agency.