US Bridges

US90 SR10 over Marquis Bayou

Good

Santa Rosa County, Florida · 0.5MI E of CR191 · Structure no. 580209

Built
2015
10 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
296 ft
8 main spans
Daily traffic
23,000
2022 count
Owner
State
State Highway Agency

About this bridge

US90 SR10 over Marquis Bayou is a concrete slab carrying US90 SR10 over Marquis Bayou in Santa Rosa County, Florida. It was built in 2015, so it is 10 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 23,000 vehicles a day, roughly 7% of them trucks, projected to reach 39,905 by 2044. The structure is 296 ft (90.2 m) long and 58 ft wide. If it were closed, the detour would be 41 mi (66 km).

CarriesUS90 SR10
CrossesMarquis Bayou
Location0.5MI E of CR191
RouteU.S. Route 90
StateFlorida
Coordinates30.62781, -87.0295
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating51.5 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length296 ft (90.2 m)
Longest span37 ft (11.3 m)
Deck width58 ft (17.6 m)
Roadway width35 ft (10.7 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 closed41 mi (66 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 Marquis Bayou built?

It was built in 2015, making it 10 years old in 2025.

What condition is US90 SR10 over Marquis Bayou 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 August 2023.

How much traffic does US90 SR10 over Marquis Bayou carry?

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

How long is US90 SR10 over Marquis Bayou?

The structure is 296 ft (90.2 m) long with a longest span of 37 ft (11.3 m) and a deck 58 ft wide.

Who owns US90 SR10 over Marquis Bayou?

It is owned by the State Highway Agency.