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Pr 431 Km 5 over Prieto River

Lares Municipio, Puerto Rico · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Pr 431 Km 5 over Prieto River in Lares Municipio, Puerto Rico, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 800 vehicles a day (traffic count year 2017).
Its listed owner is the state highway agency.
It is one of 14 of the 16 inventoried bridges in Lares Municipio rated fair (87.5%); 1 (6.2%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 297 ft
Location	10 Km South West of Lares
NBI structure number	020991
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Puerto Rico department of transportation.

Bridge	Built	Vehicles/day	Condition
Pr 129 over Pr 111	1977	23,400	Fair
Pr 111 35 Km over Guajataca River	1966	18,400	Fair
Pr 111R over Guajataca River	1978	8,500	Fair
Pr 111R over Anon Creek	1971	5,300	Fair
Pr 128 over Anon Creek	1922	4,200	Poor
Off PR 135 KM 0.05 over Guayo River	1995	3,500	Fair