US Bridges

SR 417 NB 41.8 over Lightwood Knox Canal

Good

Seminole County, Florida · 0.4 MI N of Red Bug Lk RD · Structure no. 770065

Built
1993
32 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
3 main spans
Daily traffic
30,000
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR 417 NB 41.8 over Lightwood Knox Canal is a prestressed concrete stringer/multi-beam or girder carrying SR 417 NB 41.8 over Lightwood Knox Canal in Seminole County, Florida. It was built in 1993, so it is 32 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 30,000 vehicles a day, roughly 11% of them trucks, projected to reach 52,050 by 2044. The structure is 110 ft (33.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 417 NB 41.8
CrossesLightwood Knox Canal
Location0.4 MI N of Red Bug Lk RD
RouteState Highway 417
CountySeminole County
StateFlorida
Coordinates28.66162, -81.22971
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length110 ft (33.5 m)
Longest span37 ft (11.2 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2022)
Projected traffic52,050 by 2044
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 SR 417 NB 41.8 over Lightwood Knox Canal built?

It was built in 1993, making it 32 years old in 2025.

What condition is SR 417 NB 41.8 over Lightwood Knox Canal 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 December 2023.

How much traffic does SR 417 NB 41.8 over Lightwood Knox Canal carry?

About 30,000 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SR 417 NB 41.8 over Lightwood Knox Canal?

The structure is 110 ft (33.5 m) long with a longest span of 37 ft (11.2 m) and a deck 44 ft wide.

Who owns SR 417 NB 41.8 over Lightwood Knox Canal?

It is owned by the State Toll Authority.