US Bridges

Off Pr 378 KM 4.8 over Guayanilla River

PoorPosted for load

Guayanilla Municipio, Puerto Rico · 40 Mt Off PR378 at KM 4.8 · Structure no. 016261

Built
1979
46 years old
Condition
Poor
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
4 main spans
Daily traffic
150
2005 count
Owner
City
City or Municipal Highway Agency

About this bridge

Off Pr 378 KM 4.8 over Guayanilla River is a steel stringer/multi-beam or girder carrying Off Pr 378 KM 4.8 over Guayanilla River in Guayanilla Municipio, Puerto Rico. It was built in 1979, so it is 46 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 2% of them trucks, projected to reach 250 by 2025. The structure is 55 ft (16.8 m) long and 17 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesOff Pr 378 KM 4.8
CrossesGuayanilla River
Location40 Mt Off PR378 at KM 4.8
RouteCounty Highway 0
CountyGuayanilla Municipio
StatePuerto Rico
Coordinates18.08158, -66.79636
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2025
Inspection intervalevery 6 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating12.7 US tons
Inventory rating9.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+3 approach)
Design loadUnknown
Structure length55 ft (16.8 m)
Longest span30 ft (9 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2005)
Projected traffic250 by 2025
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$316,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Off Pr 378 KM 4.8 over Guayanilla River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Off Pr 378 KM 4.8 over Guayanilla River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2025.

How much traffic does Off Pr 378 KM 4.8 over Guayanilla River carry?

About 150 vehicles per day (2005 count), of which roughly 2% are trucks.

How long is Off Pr 378 KM 4.8 over Guayanilla River?

The structure is 55 ft (16.8 m) long with a longest span of 30 ft (9 m) and a deck 17 ft wide.

Who owns Off Pr 378 KM 4.8 over Guayanilla River?

It is owned by the City or Municipal Highway Agency.