US Bridges

CR 108 over Branch Littl ST Marys Rv

Fair

Nassau County, Florida · 0.6 MI East of US 1 · Structure no. 740041

Built
1950
75 years old, rebuilt 2000
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
40 ft
4 main spans
Daily traffic
4,100
2024 count
Owner
County
County Highway Agency

About this bridge

CR 108 over Branch Littl ST Marys Rv is a concrete culvert carrying CR 108 over Branch Littl ST Marys Rv in Nassau County, Florida. It was built in 1950 and reconstructed in 2000, so it is 75 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 5 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 4,100 vehicles a day, roughly 5% of them trucks, projected to reach 7,114 by 2046. The structure is 40 ft (12.1 m) long and 49 ft wide. If it were closed, the detour would be 22.4 mi (36 km).

Location

Open in Google Maps
CarriesCR 108
CrossesBranch Littl ST Marys Rv
Location0.6 MI East of US 1
RouteCounty Highway 108
CountyNassau County
StateFlorida
Coordinates30.69611, -81.91139
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.6 US tons
Inventory rating27.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length40 ft (12.1 m)
Longest span10 ft (2.9 m)
Deck width49 ft (14.9 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2024)
Projected traffic7,114 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed22.4 mi (36 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 108 over Branch Littl ST Marys Rv built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2000.

What condition is CR 108 over Branch Littl ST Marys Rv 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 June 2024.

How much traffic does CR 108 over Branch Littl ST Marys Rv carry?

About 4,100 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is CR 108 over Branch Littl ST Marys Rv?

The structure is 40 ft (12.1 m) long with a longest span of 10 ft (2.9 m) and a deck 49 ft wide.

Who owns CR 108 over Branch Littl ST Marys Rv?

It is owned by the County Highway Agency.