US Bridges

US-441 WB over Mill Slough

Fair

Osceola County, Florida · US-441 WB - Mill Slough · Structure no. 920009

Built
1965
60 years old, rebuilt 2003
Condition
Fair
inspected February 2025
Type
Slab
Concrete
Length
152 ft
5 main spans
Daily traffic
26,000
2022 count
Owner
State
State Highway Agency

About this bridge

US-441 WB over Mill Slough is a concrete slab carrying US-441 WB over Mill Slough in Osceola County, Florida. It was built in 1965 and reconstructed in 2003, so it is 60 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 26,000 vehicles a day, roughly 12% of them trucks, projected to reach 45,110 by 2044. The structure is 152 ft (46.3 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-441 WB
CrossesMill Slough
LocationUS-441 WB - Mill Slough
RouteU.S. Route 441
StateFlorida
Coordinates28.3043, -81.38563
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span30 ft (9.1 m)
Deck width63 ft (19.2 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2022)
Projected traffic45,110 by 2044
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US-441 WB over Mill Slough built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2003.

What condition is US-441 WB over Mill Slough 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 February 2025.

How much traffic does US-441 WB over Mill Slough carry?

About 26,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US-441 WB over Mill Slough?

The structure is 152 ft (46.3 m) long with a longest span of 30 ft (9.1 m) and a deck 63 ft wide.

Who owns US-441 WB over Mill Slough?

It is owned by the State Highway Agency.