US Bridges

SR4 over Blackwater River

Good

Okaloosa County, Florida · 4.1 Miles W. of CR189N · Structure no. 570189

Built
2022
3 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
800 ft
10 main spans
Daily traffic
1,950
2022 count
Owner
State
State Highway Agency

About this bridge

SR4 over Blackwater River is a prestressed concrete stringer/multi-beam or girder carrying SR4 over Blackwater River in Okaloosa County, Florida. It was built in 2022, so it is 3 years old, younger 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 1,950 vehicles a day, roughly 22% of them trucks, projected to reach 3,383 by 2044. The structure is 800 ft (243.8 m) long and 47 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSR4
CrossesBlackwater River
Location4.1 Miles W. of CR189N
RouteState Highway 4
StateFlorida
Coordinates30.83371, -86.7343
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 protection9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.1 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans10
Design loadHL 93
Structure length800 ft (243.8 m)
Longest span80 ft (24.4 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2022)
Projected traffic3,383 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 SR4 over Blackwater River built?

It was built in 2022, making it 3 years old in 2025.

What condition is SR4 over Blackwater River 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 May 2024.

How much traffic does SR4 over Blackwater River carry?

About 1,950 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is SR4 over Blackwater River?

The structure is 800 ft (243.8 m) long with a longest span of 80 ft (24.4 m) and a deck 47 ft wide.

Who owns SR4 over Blackwater River?

It is owned by the State Highway Agency.