US Bridges

Pr 121 5.9 KM over Magina Creek

Fair

Sabana Grande Municipio, Puerto Rico · 5.5 KM S E Sabana Grande · Structure no. 020471

Built
1969
56 years old
Condition
Fair
inspected November 2024
Type
Arch - Deck
Masonry
Length
20 ft
1 main span
Daily traffic
5,500
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 121 5.9 KM over Magina Creek is a masonry arch - deck carrying Pr 121 5.9 KM over Magina Creek in Sabana Grande Municipio, Puerto Rico. It was built in 1969, so it is 56 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 5,500 vehicles a day, roughly 4% of them trucks, projected to reach 7,200 by 2025. The structure is 20 ft (6.1 m) long and 23 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesPr 121 5.9 KM
CrossesMagina Creek
Location5.5 KM S E Sabana Grande
RouteState Highway 121
CountySabana Grande Municipio
StatePuerto Rico
Coordinates18.03664, -66.93605
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
Deck7 GoodSome minor problems.
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 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating73.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width23 ft (6.9 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2017)
Projected traffic7,200 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$98,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 121 5.9 KM over Magina Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Pr 121 5.9 KM over Magina 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 November 2024.

How much traffic does Pr 121 5.9 KM over Magina Creek carry?

About 5,500 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 121 5.9 KM over Magina Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 23 ft wide.

Who owns Pr 121 5.9 KM over Magina Creek?

It is owned by the State Highway Agency.