US Bridges

US90 SR10 over Blackwater River

Fair

Santa Rosa County, Florida · 0.5 Miles East of SR87 · Structure no. 580098

Built
1986
39 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
600 ft
6 main spans
Daily traffic
23,000
2022 count
Owner
State
State Highway Agency

About this bridge

US90 SR10 over Blackwater River is a prestressed concrete stringer/multi-beam or girder carrying US90 SR10 over Blackwater River in Santa Rosa County, Florida. It was built in 1986, so it is 39 years old, younger 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 6 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 23,000 vehicles a day, roughly 7% of them trucks, projected to reach 39,905 by 2044. The structure is 600 ft (182.9 m) long and 41 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS90 SR10
CrossesBlackwater River
Location0.5 Miles East of SR87
RouteU.S. Route 90
CountySanta Rosa County
StateFlorida
Coordinates30.62391, -87.03516
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6 (+15 approach)
Design loadHS 20
Structure length600 ft (182.9 m)
Longest span80 ft (24.4 m)
Deck width41 ft (12.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2022)
Projected traffic39,905 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 US90 SR10 over Blackwater River built?

It was built in 1986, making it 39 years old in 2025.

What condition is US90 SR10 over Blackwater River 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 September 2024.

How much traffic does US90 SR10 over Blackwater River carry?

About 23,000 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US90 SR10 over Blackwater River?

The structure is 600 ft (182.9 m) long with a longest span of 80 ft (24.4 m) and a deck 41 ft wide.

Who owns US90 SR10 over Blackwater River?

It is owned by the State Highway Agency.