US Bridges

CR 375 over Mill Creek

FairPosted for load

Wakulla County, Florida · 15.5 Miles South of SR 20 · Structure no. 590021

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
90 ft
6 main spans
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

CR 375 over Mill Creek is a concrete slab carrying CR 375 over Mill Creek in Wakulla County, Florida. It was built in 1950, so it is 75 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. Its operating status is: posted for load restriction.

It carries about 600 vehicles a day, roughly 8% of them trucks, projected to reach 660 by 2043. The structure is 90 ft (27.4 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCR 375
CrossesMill Creek
Location15.5 Miles South of SR 20
RouteCounty Highway 375
StateFlorida
Coordinates30.2086, -84.66855
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span15 ft (4.6 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic660 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 CR 375 over Mill Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is CR 375 over Mill 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 January 2024.

How much traffic does CR 375 over Mill Creek carry?

About 600 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is CR 375 over Mill Creek?

The structure is 90 ft (27.4 m) long with a longest span of 15 ft (4.6 m) and a deck 22 ft wide.

Who owns CR 375 over Mill Creek?

It is owned by the County Highway Agency.