US Bridges

Pr 770 over Unknown Creek

Good

Barranquitas Municipio, Puerto Rico · 5 KM N W of Barranquitas · Structure no. 008871

Built
1970
55 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
500
2017 count
Owner
State
State Highway Agency

About this bridge

Pr 770 over Unknown Creek is a concrete culvert carrying Pr 770 over Unknown Creek in Barranquitas Municipio, Puerto Rico. It was built in 1970, so it is 55 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, roughly 2% of them trucks, projected to reach 700 by 2025. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesPr 770
CrossesUnknown Creek
Location5 KM N W of Barranquitas
RouteState Highway 770
CountyBarranquitas Municipio
StatePuerto Rico
Coordinates18.21993, -66.33168
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating39.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2017)
Projected traffic700 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$53,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pr 770 over Unknown Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Pr 770 over Unknown Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Pr 770 over Unknown Creek carry?

About 500 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Pr 770 over Unknown Creek?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Pr 770 over Unknown Creek?

It is owned by the State Highway Agency.