US Bridges

SR-100 over Palmetto Branch

Good

Putnam County, Florida · 0.2 Mi. W. of Carraway · Structure no. 760028

Built
1955
70 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
135 ft
9 main spans
Daily traffic
7,800
2022 count
Owner
State
State Highway Agency

About this bridge

SR-100 over Palmetto Branch is a concrete slab carrying SR-100 over Palmetto Branch in Putnam County, Florida. It was built in 1955, so it is 70 years old, older 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 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 7,800 vehicles a day, roughly 14% of them trucks, projected to reach 13,533 by 2044. The structure is 135 ft (41.1 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesSR-100
CrossesPalmetto Branch
Location0.2 Mi. W. of Carraway
RouteState Highway 100
CountyPutnam County
StateFlorida
Coordinates29.7109, -81.79216
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating30.6 US tons
Inventory rating23.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadH 20
Structure length135 ft (41.1 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,800 (2022)
Projected traffic13,533 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$280,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-100 over Palmetto Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is SR-100 over Palmetto 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 October 2023.

How much traffic does SR-100 over Palmetto Branch carry?

About 7,800 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is SR-100 over Palmetto Branch?

The structure is 135 ft (41.1 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns SR-100 over Palmetto Branch?

It is owned by the State Highway Agency.