US Bridges

Pr 172 over Naranjito Creek

FairPosted for load

Comerio Municipio, Puerto Rico · 3 KM Northeast of Comerio · Structure no. 003831

Built
1920
105 years old
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel
Length
68 ft
2 main spans
Daily traffic
1,500
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 172 over Naranjito Creek is a steel girder and floorbeam system carrying Pr 172 over Naranjito Creek in Comerio 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. Its operating status is: posted for load restriction.

It carries about 1,500 vehicles a day, roughly 5% of them trucks, projected to reach 1,800 by 2025. The structure is 68 ft (20.7 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPr 172
CrossesNaranjito Creek
Location3 KM Northeast of Comerio
RouteState Highway 172
CountyComerio Municipio
StatePuerto Rico
Coordinates18.22976, -66.20113
Functional classRural Minor Arterial

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.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating53.6 US tons
Inventory rating32.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length68 ft (20.7 m)
Longest span34 ft (10.5 m)
Deck width21 ft (6.3 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2017)
Projected traffic1,800 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$430,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 172 over Naranjito Creek built?

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

What condition is Pr 172 over Naranjito Creek 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 172 over Naranjito Creek carry?

About 1,500 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 172 over Naranjito Creek?

The structure is 68 ft (20.7 m) long with a longest span of 34 ft (10.5 m) and a deck 21 ft wide.

Who owns Pr 172 over Naranjito Creek?

It is owned by the State Highway Agency.