US Bridges

Pr 121 1.2 KM over Guanajibo River

Fair

Sabana Grande Municipio, Puerto Rico · 2 KM S E of Sabana Grande · Structure no. 020861

Built
1978
47 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
328 ft
4 main spans
Daily traffic
8,000
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 121 1.2 KM over Guanajibo River is a prestressed concrete stringer/multi-beam or girder carrying Pr 121 1.2 KM over Guanajibo River in Sabana Grande Municipio, Puerto Rico. It was built in 1978, so it is 47 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 8,000 vehicles a day, roughly 4% of them trucks, projected to reach 10,400 by 2025. The structure is 328 ft (100 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPr 121 1.2 KM
CrossesGuanajibo River
Location2 KM S E of Sabana Grande
RouteState Highway 121
CountySabana Grande Municipio
StatePuerto Rico
Coordinates18.06777, -66.95778
Functional classUrban 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.
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 inspectionNovember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length328 ft (100 m)
Longest span82 ft (25.1 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2017)
Projected traffic10,400 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 121 1.2 KM over Guanajibo River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Pr 121 1.2 KM over Guanajibo 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 November 2024.

How much traffic does Pr 121 1.2 KM over Guanajibo River carry?

About 8,000 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 121 1.2 KM over Guanajibo River?

The structure is 328 ft (100 m) long with a longest span of 82 ft (25.1 m) and a deck 34 ft wide.

Who owns Pr 121 1.2 KM over Guanajibo River?

It is owned by the State Highway Agency.