US Bridges

Norman Riley Road over Lighter Knot

FairPosted for load

Santa Rosa County, Florida · 3.5MI S of Charlie Foster · Structure no. 580804

Built
1990
35 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
45 ft
4 main spans
Daily traffic
150
2024 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Norman Riley Road over Lighter Knot is a wood or timber stringer/multi-beam or girder carrying Norman Riley Road over Lighter Knot in Santa Rosa County, Florida. It was built in 1990, so it is 35 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 2% of them trucks, projected to reach 260 by 2046. The structure is 45 ft (13.8 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNorman Riley Road
CrossesLighter Knot
Location3.5MI S of Charlie Foster
RouteState Lands Road 0
StateFlorida
Coordinates30.78625, -86.79783
Functional classRural Local

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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.4 US tons
Inventory rating24.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length45 ft (13.8 m)
Longest span11 ft (3.5 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic260 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Norman Riley Road over Lighter Knot built?

It was built in 1990, making it 35 years old in 2025.

What condition is Norman Riley Road over Lighter Knot 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 September 2024.

How much traffic does Norman Riley Road over Lighter Knot carry?

About 150 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Norman Riley Road over Lighter Knot?

The structure is 45 ft (13.8 m) long with a longest span of 11 ft (3.5 m) and a deck 20 ft wide.

Who owns Norman Riley Road over Lighter Knot?

It is owned by the State Park, Forest, or Reservation Agency.