US Bridges

US90 SR10 over Simpson River

Good

Santa Rosa County, Florida · 1.8 MI E of County Line · Structure no. 580108

Built
1997
28 years old, rebuilt 2021
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,123 ft
18 main spans
Daily traffic
20,750
2022 count
Owner
State
State Highway Agency

About this bridge

US90 SR10 over Simpson River is a prestressed concrete stringer/multi-beam or girder carrying US90 SR10 over Simpson River in Santa Rosa County, Florida. It was built in 1997 and reconstructed in 2021, so it is 28 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 20,750 vehicles a day, roughly 6% of them trucks, projected to reach 36,001 by 2044. The structure is 1,123 ft (342.4 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS90 SR10
CrossesSimpson River
Location1.8 MI E of County Line
RouteU.S. Route 90
StateFlorida
Coordinates30.57652, -87.18244
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating40.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20 + Mod
Structure length1,123 ft (342.4 m)
Longest span67 ft (20.3 m)
Deck width59 ft (17.9 m)
Roadway width49 ft (14.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,750 (2022)
Projected traffic36,001 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Simpson River built?

It was built in 1997, making it 28 years old in 2025. It was reconstructed in 2021.

What condition is US90 SR10 over Simpson 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 August 2024.

How much traffic does US90 SR10 over Simpson River carry?

About 20,750 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US90 SR10 over Simpson River?

The structure is 1,123 ft (342.4 m) long with a longest span of 67 ft (20.3 m) and a deck 59 ft wide.

Who owns US90 SR10 over Simpson River?

It is owned by the State Highway Agency.