US Bridges

CR 178 over Mare Branch

Fair

Santa Rosa County, Florida · 2.22 MI West of SR 87 · Structure no. 580067

Built
1901
124 years old, rebuilt 1971
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
350
2023 count
Owner
County
County Highway Agency

About this bridge

CR 178 over Mare Branch is a concrete culvert carrying CR 178 over Mare Branch in Santa Rosa County, Florida. It was built in 1901 and reconstructed in 1971, so it is 124 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 350 vehicles a day, roughly 8% of them trucks, projected to reach 608 by 2044. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 178
CrossesMare Branch
Location2.22 MI West of SR 87
RouteCounty Highway 178
CountySanta Rosa County
StateFlorida
Coordinates30.83509, -87.0861
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 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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: 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 rating63.1 US tons
Inventory rating38 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2023)
Projected traffic608 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 178 over Mare Branch built?

It was built in 1901, making it 124 years old in 2025. It was reconstructed in 1971.

What condition is CR 178 over Mare 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 March 2024.

How much traffic does CR 178 over Mare Branch carry?

About 350 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is CR 178 over Mare Branch?

The structure is 38 ft (11.6 m) long with a longest span of 13 ft (3.9 m).

Who owns CR 178 over Mare Branch?

It is owned by the County Highway Agency.