US Bridges

Pr 378 over Guayanilla River

Fair

Guayanilla Municipio, Puerto Rico · 70 Mt Int Pr 378 & Pr · Structure no. 018731

Built
1987
38 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
227 ft
4 main spans
Daily traffic
400
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 378 over Guayanilla River is a steel stringer/multi-beam or girder carrying Pr 378 over Guayanilla River in Guayanilla Municipio, Puerto Rico. It was built in 1987, so it is 38 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 400 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2025. The structure is 227 ft (69.3 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesPr 378
CrossesGuayanilla River
Location70 Mt Int Pr 378 & Pr
RouteState Highway 378
CountyGuayanilla Municipio
StatePuerto Rico
Coordinates18.05411, -66.78694
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating70.4 US tons
Inventory rating42.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length227 ft (69.3 m)
Longest span60 ft (18.3 m)
Deck width36 ft (10.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2017)
Projected traffic500 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 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$1.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 378 over Guayanilla River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Pr 378 over Guayanilla 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 July 2023.

How much traffic does Pr 378 over Guayanilla River carry?

About 400 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 378 over Guayanilla River?

The structure is 227 ft (69.3 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns Pr 378 over Guayanilla River?

It is owned by the State Highway Agency.