US Bridges

Cobbtown Road over Blackjack Creek

Good

Santa Rosa County, Florida · 0.9 MI South of CR164 · Structure no. 584160

Built
1994
31 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
4 main spans
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

Cobbtown Road over Blackjack Creek is a wood or timber stringer/multi-beam or girder carrying Cobbtown Road over Blackjack Creek in Santa Rosa County, Florida. It was built in 1994, so it is 31 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 50 vehicles a day, projected to reach 87 by 2046. The structure is 39 ft (12 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCobbtown Road
CrossesBlackjack Creek
Location0.9 MI South of CR164
RouteCounty Highway 0
StateFlorida
Coordinates30.87009, -87.12115
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.1 US tons
Inventory rating51 US tons

Structure

MaterialWood or Timber
DeckConcrete, precast panels
Main spans4
Design loadUnknown
Structure length39 ft (12 m)
Longest span10 ft (2.9 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic87 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Cobbtown Road over Blackjack Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Cobbtown Road over Blackjack Creek 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 July 2024.

How much traffic does Cobbtown Road over Blackjack Creek carry?

About 50 vehicles per day (2024 count).

How long is Cobbtown Road over Blackjack Creek?

The structure is 39 ft (12 m) long with a longest span of 10 ft (2.9 m) and a deck 24 ft wide.

Who owns Cobbtown Road over Blackjack Creek?

It is owned by the County Highway Agency.