US Bridges

Old Martin Road over Unnamed Branch

Fair

Santa Rosa County, Florida · 0.55 MI N of CR 4 · Structure no. 584211

Built
2009
16 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Old Martin Road over Unnamed Branch is a steel stringer/multi-beam or girder carrying Old Martin Road over Unnamed Branch in Santa Rosa County, Florida. It was built in 2009, so it is 16 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.

It carries about 100 vehicles a day, projected to reach 174 by 2042. The structure is 25 ft (7.6 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesOld Martin Road
CrossesUnnamed Branch
Location0.55 MI N of CR 4
RouteCounty Highway 0
CountySanta Rosa County
StateFlorida
Coordinates30.85878, -86.80537
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic174 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Old Martin Road over Unnamed Branch built?

It was built in 2009, making it 16 years old in 2025.

What condition is Old Martin Road over Unnamed Branch 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 2023.

How much traffic does Old Martin Road over Unnamed Branch carry?

About 100 vehicles per day (2023 count).

How long is Old Martin Road over Unnamed Branch?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns Old Martin Road over Unnamed Branch?

It is owned by the County Highway Agency.