US Bridges

Pr 31 over Blanco River

GoodPosted for load

Naguabo Municipio, Puerto Rico · 5KM West Naguabo · Structure no. 031191

Built
2021
4 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
204 ft
3 main spans
Daily traffic
2,837
2010 count
Owner
State
State Highway Agency

About this bridge

Pr 31 over Blanco River is a prestressed concrete stringer/multi-beam or girder carrying Pr 31 over Blanco River in Naguabo Municipio, Puerto Rico. It was built in 2021, so it is 4 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 2,837 vehicles a day, roughly 4% of them trucks, projected to reach 19,200 by 2025. The structure is 204 ft (62.1 m) long and 51 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPr 31
CrossesBlanco River
Location5KM West Naguabo
RouteState Highway 31
CountyNaguabo Municipio
StatePuerto Rico
Coordinates18.21724, -65.78244
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22 US tons
Inventory rating11.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length204 ft (62.1 m)
Longest span68 ft (20.7 m)
Deck width51 ft (15.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,837 (2010)
Projected traffic19,200 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 31 over Blanco River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Pr 31 over Blanco River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Pr 31 over Blanco River carry?

About 2,837 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is Pr 31 over Blanco River?

The structure is 204 ft (62.1 m) long with a longest span of 68 ft (20.7 m) and a deck 51 ft wide.

Who owns Pr 31 over Blanco River?

It is owned by the State Highway Agency.