US Bridges

Pr 181 over Waterway

Fair

San Lorenzo Municipio, Puerto Rico · 2.5 KM South San Lorenzo · Structure no. 004231

Built
1930
95 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
2,600
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 181 over Waterway is a steel stringer/multi-beam or girder carrying Pr 181 over Waterway in San Lorenzo Municipio, Puerto Rico. It was built in 1930, so it is 95 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 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 2,600 vehicles a day, roughly 5% of them trucks, projected to reach 3,500 by 2025. The structure is 35 ft (10.7 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesPr 181
CrossesWaterway
Location2.5 KM South San Lorenzo
RouteState Highway 181
CountySan Lorenzo Municipio
StatePuerto Rico
Coordinates18.18113, -65.9765
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating93.5 US tons
Inventory rating48.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span30 ft (9 m)
Deck width24 ft (7.4 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2017)
Projected traffic3,500 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$264,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 181 over Waterway built?

It was built in 1930, making it 95 years old in 2025.

What condition is Pr 181 over Waterway 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 August 2023.

How much traffic does Pr 181 over Waterway carry?

About 2,600 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 181 over Waterway?

The structure is 35 ft (10.7 m) long with a longest span of 30 ft (9 m) and a deck 24 ft wide.

Who owns Pr 181 over Waterway?

It is owned by the State Highway Agency.