US Bridges

Northwest Gray RD over Mayo Mill Branch

Fair

Calhoun County, Florida · 0.9 Miles West of SR73 · Structure no. 474063

Built
2013
12 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

Northwest Gray RD over Mayo Mill Branch is a concrete culvert carrying Northwest Gray RD over Mayo Mill Branch in Calhoun County, Florida. It was built in 2013, so it is 12 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 50 vehicles a day, projected to reach 55 by 2042. The structure is 27 ft (8.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNorthwest Gray RD
CrossesMayo Mill Branch
Location0.9 Miles West of SR73
RouteCounty Highway 0
CountyCalhoun County
StateFlorida
Coordinates30.49189, -85.21108
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length27 ft (8.3 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic55 by 2042
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 Northwest Gray RD over Mayo Mill Branch built?

It was built in 2013, making it 12 years old in 2025.

What condition is Northwest Gray RD over Mayo Mill 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 May 2023.

How much traffic does Northwest Gray RD over Mayo Mill Branch carry?

About 50 vehicles per day (2022 count).

How long is Northwest Gray RD over Mayo Mill Branch?

The structure is 27 ft (8.3 m) long with a longest span of 10 ft (3.1 m).

Who owns Northwest Gray RD over Mayo Mill Branch?

It is owned by the County Highway Agency.