US Bridges

Palm Avenue over Garrison Bight

Fair

Monroe County, Florida · 0.2 Mile W of US-1 · Structure no. 904025

Built
1965
60 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
3 main spans
Daily traffic
15,026
2023 count
Owner
County
County Highway Agency

About this bridge

Palm Avenue over Garrison Bight is a prestressed concrete stringer/multi-beam or girder carrying Palm Avenue over Garrison Bight in Monroe County, Florida. It was built in 1965, so it is 60 years old, older than the Florida average of 41.3 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 15,026 vehicles a day, roughly 5% of them trucks, projected to reach 26,070 by 2042. The structure is 177 ft (54.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPalm Avenue
CrossesGarrison Bight
Location0.2 Mile W of US-1
RouteCity Street 0
CountyMonroe County
StateFlorida
Coordinates24.56097, -81.78706
Functional classUrban 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.9 US tons
Inventory rating32.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length177 ft (54.1 m)
Longest span59 ft (18 m)
Deck width41 ft (12.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,026 (2023)
Projected traffic26,070 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Palm Avenue over Garrison Bight built?

It was built in 1965, making it 60 years old in 2025.

What condition is Palm Avenue over Garrison Bight 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 December 2023.

How much traffic does Palm Avenue over Garrison Bight carry?

About 15,026 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Palm Avenue over Garrison Bight?

The structure is 177 ft (54.1 m) long with a longest span of 59 ft (18 m) and a deck 41 ft wide.

Who owns Palm Avenue over Garrison Bight?

It is owned by the County Highway Agency.