US Bridges

CR 309C over Stripper Swamp Branch

Good

Putnam County, Florida · 0.1 MI S of SR 100 · Structure no. 764046

Built
2002
23 years old, rebuilt 2011
Condition
Good
inspected February 2025
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

CR 309C over Stripper Swamp Branch is a concrete culvert carrying CR 309C over Stripper Swamp Branch in Putnam County, Florida. It was built in 2002 and reconstructed in 2011, so it is 23 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,600 vehicles a day, roughly 6% of them trucks, projected to reach 2,776 by 2042. The structure is 21 ft (6.5 m) long. If it were closed, the detour would be 4.3 mi (7 km).

CarriesCR 309C
CrossesStripper Swamp Branch
Location0.1 MI S of SR 100
RouteCounty Highway 309C
StateFlorida
Coordinates29.67295, -81.71323
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating95.3 US tons
Inventory rating57.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.5 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic2,776 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 309C over Stripper Swamp Branch built?

It was built in 2002, making it 23 years old in 2025. It was reconstructed in 2011.

What condition is CR 309C over Stripper Swamp Branch 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 February 2025.

How much traffic does CR 309C over Stripper Swamp Branch carry?

About 1,600 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is CR 309C over Stripper Swamp Branch?

The structure is 21 ft (6.5 m) long with a longest span of 10 ft (3.2 m).

Who owns CR 309C over Stripper Swamp Branch?

It is owned by the County Highway Agency.