US Bridges

CR 13A over Branch of Six Mile Creek

Fair

St. Johns County, Florida · 2.7 MI N of CR 214 · Structure no. 784020

Built
1926
99 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
3,600
2024 count
Owner
County
County Highway Agency

About this bridge

CR 13A over Branch of Six Mile Creek is a concrete culvert carrying CR 13A over Branch of Six Mile Creek in St. Johns County, Florida. It was built in 1926, so it is 99 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 3,600 vehicles a day, roughly 2% of them trucks, projected to reach 6,246 by 2046. The structure is 23 ft (7 m) long. If it were closed, the detour would be 12.4 mi (20 km).

CarriesCR 13A
CrossesBranch of Six Mile Creek
Location2.7 MI N of CR 214
RouteCounty Highway 13A
StateFlorida
Coordinates29.89061, -81.49469
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating25.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2024)
Projected traffic6,246 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 13A over Branch of Six Mile Creek built?

It was built in 1926, making it 99 years old in 2025.

What condition is CR 13A over Branch of Six Mile Creek 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 October 2024.

How much traffic does CR 13A over Branch of Six Mile Creek carry?

About 3,600 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is CR 13A over Branch of Six Mile Creek?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.3 m).

Who owns CR 13A over Branch of Six Mile Creek?

It is owned by the County Highway Agency.