US Bridges

Pr 177 9.6 KM over Piedras River

Fair

San Juan Municipio, Puerto Rico · 1.5 KM Int Pr 52 & Pr · Structure no. 018981

Built
1989
36 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
149 ft
2 main spans
Daily traffic
24,600
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 177 9.6 KM over Piedras River is a prestressed concrete stringer/multi-beam or girder carrying Pr 177 9.6 KM over Piedras River in San Juan Municipio, Puerto Rico. It was built in 1989, so it is 36 years old, younger 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 24,600 vehicles a day, roughly 5% of them trucks, projected to reach 28,800 by 2025. The structure is 149 ft (45.5 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPr 177 9.6 KM
CrossesPiedras River
Location1.5 KM Int Pr 52 & Pr
RouteState Highway 177
CountySan Juan Municipio
StatePuerto Rico
Coordinates18.37042, -66.05897
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
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 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.8 US tons
Inventory rating42.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length149 ft (45.5 m)
Longest span71 ft (21.6 m)
Deck width58 ft (17.7 m)
Roadway width50 ft (15.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,600 (2017)
Projected traffic28,800 by 2025
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$113,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 177 9.6 KM over Piedras River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Pr 177 9.6 KM over Piedras 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 August 2024.

How much traffic does Pr 177 9.6 KM over Piedras River carry?

About 24,600 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 177 9.6 KM over Piedras River?

The structure is 149 ft (45.5 m) long with a longest span of 71 ft (21.6 m) and a deck 58 ft wide.

Who owns Pr 177 9.6 KM over Piedras River?

It is owned by the State Highway Agency.