US Bridges

Pr 177 over Pr 20 (mrtnz. Nadal Exp)

FairPosted for load

Guaynabo Municipio, Puerto Rico · At North West of Guaynabo · Structure no. 015211

Built
1976
49 years old, rebuilt 1992
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
269 ft
3 main spans
Daily traffic
43,300
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 177 over Pr 20 (mrtnz. Nadal Exp) is a prestressed concrete stringer/multi-beam or girder carrying Pr 177 over Pr 20 (mrtnz. Nadal Exp) in Guaynabo Municipio, Puerto Rico. It was built in 1976 and reconstructed in 1992, so it is 49 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 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 43,300 vehicles a day, roughly 5% of them trucks, projected to reach 51,000 by 2025. The structure is 269 ft (81.9 m) long and 135 ft wide.

Location

Open in Google Maps
CarriesPr 177
CrossesPr 20 (mrtnz. Nadal Exp)
LocationAt North West of Guaynabo
RouteState Highway 177
CountyGuaynabo Municipio
StatePuerto Rico
Coordinates18.38244, -66.10777
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating16.1 US tons
Inventory rating9.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length269 ft (81.9 m)
Longest span122 ft (37.2 m)
Deck width135 ft (41.1 m)
Roadway width116 ft (35.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,300 (2017)
Projected traffic51,000 by 2025
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
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$44,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pr 177 over Pr 20 (mrtnz. Nadal Exp) built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 1992.

What condition is Pr 177 over Pr 20 (mrtnz. Nadal Exp) 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 177 over Pr 20 (mrtnz. Nadal Exp) carry?

About 43,300 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Pr 177 over Pr 20 (mrtnz. Nadal Exp)?

The structure is 269 ft (81.9 m) long with a longest span of 122 ft (37.2 m) and a deck 135 ft wide.

Who owns Pr 177 over Pr 20 (mrtnz. Nadal Exp)?

It is owned by the State Highway Agency.