US Bridges

Pr 9973 1.4 KM over Unknown Creek

FairPosted for load

Naguabo Municipio, Puerto Rico · 5 Miles N E of Naguabo · Structure no. 011961

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
4,200
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 9973 1.4 KM over Unknown Creek is a concrete culvert carrying Pr 9973 1.4 KM over Unknown Creek in Naguabo Municipio, Puerto Rico. It was built in 1972, so it is 53 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. Its operating status is: posted for load restriction.

It carries about 4,200 vehicles a day, roughly 3% of them trucks, projected to reach 5,500 by 2025. The structure is 29 ft (8.9 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPr 9973 1.4 KM
CrossesUnknown Creek
Location5 Miles N E of Naguabo
RouteState Highway 9973
CountyNaguabo Municipio
StatePuerto Rico
Coordinates18.24479, -65.70317
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length29 ft (8.9 m)
Longest span14 ft (4.2 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2017)
Projected traffic5,500 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$193,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 9973 1.4 KM over Unknown Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Pr 9973 1.4 KM over Unknown 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 September 2024.

How much traffic does Pr 9973 1.4 KM over Unknown Creek carry?

About 4,200 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Pr 9973 1.4 KM over Unknown Creek?

The structure is 29 ft (8.9 m) long with a longest span of 14 ft (4.2 m) and a deck 31 ft wide.

Who owns Pr 9973 1.4 KM over Unknown Creek?

It is owned by the State Highway Agency.