US Bridges

US90 SR10 Mahan DR over Amrhein Branch

Fair

Leon County, Florida · 0.5 Mi. West of SR261 · Structure no. 550108

Built
1974
51 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
49 ft
4 main spans
Daily traffic
29,000
2022 count
Owner
State
State Highway Agency

About this bridge

US90 SR10 Mahan DR over Amrhein Branch is a concrete culvert carrying US90 SR10 Mahan DR over Amrhein Branch in Leon County, Florida. It was built in 1974, so it is 51 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 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 29,000 vehicles a day, roughly 4% of them trucks, projected to reach 50,315 by 2044. The structure is 49 ft (14.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS90 SR10 Mahan DR
CrossesAmrhein Branch
Location0.5 Mi. West of SR261
RouteU.S. Route 90
CountyLeon County
StateFlorida
Coordinates30.45864, -84.23186
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length49 ft (14.8 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2022)
Projected traffic50,315 by 2044
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mahan DR over Amrhein Branch built?

It was built in 1974, making it 51 years old in 2025.

What condition is US90 SR10 Mahan DR over Amrhein Branch 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 December 2023.

How much traffic does US90 SR10 Mahan DR over Amrhein Branch carry?

About 29,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is US90 SR10 Mahan DR over Amrhein Branch?

The structure is 49 ft (14.8 m) long with a longest span of 11 ft (3.5 m).

Who owns US90 SR10 Mahan DR over Amrhein Branch?

It is owned by the State Highway Agency.