US Bridges

SR-100 over Alligator Creek

Good

Bradford County, Florida · In Starke · Structure no. 280023

Built
1954
71 years old, rebuilt 2001
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
120 ft
8 main spans
Daily traffic
7,200
2022 count
Owner
State
State Highway Agency

About this bridge

SR-100 over Alligator Creek is a concrete slab carrying SR-100 over Alligator Creek in Bradford County, Florida. It was built in 1954 and reconstructed in 2001, 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 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 7,200 vehicles a day, roughly 6% of them trucks, projected to reach 12,492 by 2044. The structure is 120 ft (36.6 m) long and 56 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSR-100
CrossesAlligator Creek
LocationIn Starke
RouteState Highway 100
CountyBradford County
StateFlorida
Coordinates29.93819, -82.10618
Functional classUrban 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 protection7 GoodSome minor problems.
Last inspectionApril 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 20
Structure length120 ft (36.6 m)
Longest span15 ft (4.6 m)
Deck width56 ft (17.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2022)
Projected traffic12,492 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-100 over Alligator Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2001.

What condition is SR-100 over Alligator 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 April 2023.

How much traffic does SR-100 over Alligator Creek carry?

About 7,200 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR-100 over Alligator Creek?

The structure is 120 ft (36.6 m) long with a longest span of 15 ft (4.6 m) and a deck 56 ft wide.

Who owns SR-100 over Alligator Creek?

It is owned by the State Highway Agency.