US Bridges

Pr 409 over Guaba River

Fair

Las Marias Municipio, Puerto Rico · 6 KM S E of Las Marias · Structure no. 020981

Built
1978
47 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
2 main spans
Daily traffic
500
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 409 over Guaba River is a prestressed concrete stringer/multi-beam or girder carrying Pr 409 over Guaba River in Las Marias Municipio, Puerto Rico. It was built in 1978, so it is 47 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 500 vehicles a day, roughly 4% of them trucks, projected to reach 600 by 2025. The structure is 147 ft (44.8 m) long and 36 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesPr 409
CrossesGuaba River
Location6 KM S E of Las Marias
RouteState Highway 409
CountyLas Marias Municipio
StatePuerto Rico
Coordinates18.20908, -66.96646
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.4 US tons
Inventory rating55.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span69 ft (21 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2017)
Projected traffic600 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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$98,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 409 over Guaba River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Pr 409 over Guaba 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 October 2023.

How much traffic does Pr 409 over Guaba River carry?

About 500 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 409 over Guaba River?

The structure is 147 ft (44.8 m) long with a longest span of 69 ft (21 m) and a deck 36 ft wide.

Who owns Pr 409 over Guaba River?

It is owned by the State Highway Agency.