US Bridges

SR-51 over Suwannee River Relief

Fair

Suwannee County, Florida · 0.3 Mi.N.Of Hal Adams Brg · Structure no. 370005

Built
1947
78 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
132 ft
4 main spans
Daily traffic
4,900
2022 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 4,900 vehicles a day, roughly 8% of them trucks, projected to reach 8,502 by 2044. The structure is 132 ft (40.2 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
Location0.3 Mi.N.Of Hal Adams Brg
RouteState Highway 51
CountySuwannee County
StateFlorida
Coordinates30.10509, -83.17122
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 protection7 GoodSome minor problems.
Last inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length132 ft (40.2 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 traffic4,900 (2022)
Projected traffic8,502 by 2044
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$233,000
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 March 2024.

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

About 4,900 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SR-51 over Suwannee River Relief?

The structure is 132 ft (40.2 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.