US Bridges

Pr 156 over LA Plata River

Fair

Comerio Municipio, Puerto Rico · 2.3 KM N E of Comerio · Structure no. 019591

Built
1991
34 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
269 ft
3 main spans
Daily traffic
3,600
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 156 over LA Plata River is a prestressed concrete stringer/multi-beam or girder carrying Pr 156 over LA Plata River in Comerio Municipio, Puerto Rico. It was built in 1991, so it is 34 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 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 3,600 vehicles a day, roughly 4% of them trucks, projected to reach 4,320 by 2025. The structure is 269 ft (82.1 m) long and 41 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesPr 156
CrossesLA Plata River
Location2.3 KM N E of Comerio
RouteState Highway 156
CountyComerio Municipio
StatePuerto Rico
Coordinates18.23817, -66.21071
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.9 US tons
Inventory rating27.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length269 ft (82.1 m)
Longest span123 ft (37.5 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2017)
Projected traffic4,320 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$2.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 156 over LA Plata River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Pr 156 over LA Plata 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 June 2023.

How much traffic does Pr 156 over LA Plata River carry?

About 3,600 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 156 over LA Plata River?

The structure is 269 ft (82.1 m) long with a longest span of 123 ft (37.5 m) and a deck 41 ft wide.

Who owns Pr 156 over LA Plata River?

It is owned by the State Highway Agency.