US Bridges

Pr 159 5.2 KM over Unibon River

Fair

Morovis Municipio, Puerto Rico · 5 KM East of Morovis · Structure no. 003511

Built
1921
104 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
2 main spans
Daily traffic
8,900
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 159 5.2 KM over Unibon River is a steel stringer/multi-beam or girder carrying Pr 159 5.2 KM over Unibon River in Morovis Municipio, Puerto Rico. It was built in 1921, so it is 104 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.

It carries about 8,900 vehicles a day, roughly 4% of them trucks, projected to reach 11,600 by 2025. The structure is 63 ft (19.1 m) long and 20 ft wide. If it were closed, the detour would be 91.3 mi (147 km).

Location

Open in Google Maps
CarriesPr 159 5.2 KM
CrossesUnibon River
Location5 KM East of Morovis
RouteState Highway 159
CountyMorovis Municipio
StatePuerto Rico
Coordinates18.33932, -66.37635
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 rating67.8 US tons
Inventory rating40.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length63 ft (19.1 m)
Longest span31 ft (9.6 m)
Deck width20 ft (6.2 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,900 (2017)
Projected traffic11,600 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed91.3 mi (147 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 159 5.2 KM over Unibon River built?

It was built in 1921, making it 104 years old in 2025.

What condition is Pr 159 5.2 KM over Unibon 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 159 5.2 KM over Unibon River carry?

About 8,900 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Pr 159 5.2 KM over Unibon River?

The structure is 63 ft (19.1 m) long with a longest span of 31 ft (9.6 m) and a deck 20 ft wide.

Who owns Pr 159 5.2 KM over Unibon River?

It is owned by the State Highway Agency.