US Bridges

Pr 128 over Blanco River

Fair

Lares Municipio, Puerto Rico · 7 KM South of Lares · Structure no. 002621

Built
1920
105 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
162 ft
2 main spans
Daily traffic
700
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 128 over Blanco River is a concrete arch - deck carrying Pr 128 over Blanco River in Lares Municipio, Puerto Rico. It was built in 1920, so it is 105 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.

It carries about 700 vehicles a day, roughly 5% of them trucks, projected to reach 900 by 2025. The structure is 162 ft (49.5 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPr 128
CrossesBlanco River
Location7 KM South of Lares
RouteState Highway 128
CountyLares Municipio
StatePuerto Rico
Coordinates18.24097, -66.86334
Functional classUrban 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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating93 US tons
Inventory rating56.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length162 ft (49.5 m)
Longest span55 ft (16.8 m)
Deck width21 ft (6.3 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2017)
Projected traffic900 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$926,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 128 over Blanco River built?

It was built in 1920, making it 105 years old in 2025.

What condition is Pr 128 over Blanco 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 March 2023.

How much traffic does Pr 128 over Blanco River carry?

About 700 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 128 over Blanco River?

The structure is 162 ft (49.5 m) long with a longest span of 55 ft (16.8 m) and a deck 21 ft wide.

Who owns Pr 128 over Blanco River?

It is owned by the State Highway Agency.