US Bridges

SR-51 over Suwannee River Relief

Fair

Suwannee County, Florida · 0.7 Mi.N.Of Hal Adams Brg · Structure no. 370006

Built
1947
78 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
99 ft
3 main spans
Daily traffic
5,200
2023 count
Owner
State
State Highway Agency

About this bridge

SR-51 over Suwannee River Relief is a concrete tee beam carrying SR-51 over Suwannee River Relief in Suwannee County, Florida. It was built in 1947, so it is 78 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 5,200 vehicles a day, roughly 8% of them trucks, projected to reach 9,022 by 2045. The structure is 99 ft (30.2 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSR-51
CrossesSuwannee River Relief
Location0.7 Mi.N.Of Hal Adams Brg
RouteState Highway 51
CountySuwannee County
StateFlorida
Coordinates30.11106, -83.17067
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating47.8 US tons
Inventory rating28.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length99 ft (30.2 m)
Longest span33 ft (10.1 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2023)
Projected traffic9,022 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$224,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-51 over Suwannee River Relief built?

It was built in 1947, making it 78 years old in 2025.

What condition is SR-51 over Suwannee River Relief 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 July 2024.

How much traffic does SR-51 over Suwannee River Relief carry?

About 5,200 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR-51 over Suwannee River Relief?

The structure is 99 ft (30.2 m) long with a longest span of 33 ft (10.1 m) and a deck 30 ft wide.

Who owns SR-51 over Suwannee River Relief?

It is owned by the State Highway Agency.