US Bridges

Off Pr 788 4.2 KM over Unknown Creek

Fair

San Lorenzo Municipio, Puerto Rico · 6.3 West of San Lorenzo · Structure no. 026281

Built
1999
26 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
24 ft
1 main span
Daily traffic
3,300
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Off Pr 788 4.2 KM over Unknown Creek is a concrete tee beam carrying Off Pr 788 4.2 KM over Unknown Creek in San Lorenzo Municipio, Puerto Rico. It was built in 1999, so it is 26 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 3,300 vehicles a day, roughly 2% of them trucks, projected to reach 4,800 by 2025. The structure is 24 ft (7.4 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesOff Pr 788 4.2 KM
CrossesUnknown Creek
Location6.3 West of San Lorenzo
RouteCounty Highway 0
CountySan Lorenzo Municipio
StatePuerto Rico
Coordinates18.17236, -66.00386
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating75.6 US tons
Inventory rating58.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.4 m)
Longest span22 ft (6.8 m)
Deck width18 ft (5.5 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2017)
Projected traffic4,800 by 2025
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$15,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Off Pr 788 4.2 KM over Unknown Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is Off Pr 788 4.2 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 June 2024.

How much traffic does Off Pr 788 4.2 KM over Unknown Creek carry?

About 3,300 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Off Pr 788 4.2 KM over Unknown Creek?

The structure is 24 ft (7.4 m) long with a longest span of 22 ft (6.8 m) and a deck 18 ft wide.

Who owns Off Pr 788 4.2 KM over Unknown Creek?

It is owned by the City or Municipal Highway Agency.