US Bridges

Pr 7729 over LA Plata River

FairPosted for load

Cayey Municipio, Puerto Rico · 3 Miles N W of Cayey · Structure no. 006151

Built
1950
75 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
500
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 7729 over LA Plata River is a concrete continuous slab carrying Pr 7729 over LA Plata River in Cayey Municipio, Puerto Rico. It was built in 1950, so it is 75 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, roughly 5% of them trucks, projected to reach 700 by 2025. The structure is 108 ft (32.9 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesPr 7729
CrossesLA Plata River
Location3 Miles N W of Cayey
RouteState Highway 7729
CountyCayey Municipio
StatePuerto Rico
Coordinates18.13759, -66.19577
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20.2 US tons
Inventory rating15.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length108 ft (32.9 m)
Longest span43 ft (13 m)
Deck width24 ft (7.2 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2017)
Projected traffic700 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$513,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 7729 over LA Plata River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Pr 7729 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 July 2023.

How much traffic does Pr 7729 over LA Plata River carry?

About 500 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 7729 over LA Plata River?

The structure is 108 ft (32.9 m) long with a longest span of 43 ft (13 m) and a deck 24 ft wide.

Who owns Pr 7729 over LA Plata River?

It is owned by the State Highway Agency.