US Bridges

CR 309 over Acosta Creek

Fair

Putnam County, Florida · 1.8 Mi. N. of CR 308B · Structure no. 764011

Built
1954
71 years old, rebuilt 1988
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
4,700
2023 count
Owner
County
County Highway Agency

About this bridge

CR 309 over Acosta Creek is a concrete culvert carrying CR 309 over Acosta Creek in Putnam County, Florida. It was built in 1954 and reconstructed in 1988, so it is 71 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 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 4,700 vehicles a day, roughly 11% of them trucks, projected to reach 8,155 by 2042. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCR 309
CrossesAcosta Creek
Location1.8 Mi. N. of CR 308B
RouteCounty Highway 309
CountyPutnam County
StateFlorida
Coordinates29.505, -81.67028
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length28 ft (8.5 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 traffic4,700 (2023)
Projected traffic8,155 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 309 over Acosta Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1988.

What condition is CR 309 over Acosta 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 February 2025.

How much traffic does CR 309 over Acosta Creek carry?

About 4,700 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is CR 309 over Acosta Creek?

The structure is 28 ft (8.5 m) long with a longest span of 11 ft (3.4 m).

Who owns CR 309 over Acosta Creek?

It is owned by the County Highway Agency.