US Bridges

CR 30B over Indian Lagoon

PoorPosted for load

Gulf County, Florida · 0.2 Miles South of CR 30A · Structure no. 510020

Built
1980
45 years old
Condition
Poor
inspected December 2024
Type
Channel Beam
Concrete
Length
50 ft
2 main spans
Daily traffic
220
2023 count
Owner
County
County Highway Agency

About this bridge

CR 30B over Indian Lagoon is a concrete channel beam carrying CR 30B over Indian Lagoon in Gulf County, Florida. It was built in 1980, so it is 45 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 220 vehicles a day, projected to reach 242 by 2043. The structure is 50 ft (15.2 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCR 30B
CrossesIndian Lagoon
Location0.2 Miles South of CR 30A
RouteCounty Highway 30B
CountyGulf County
StateFlorida
Coordinates29.68505, -85.2649
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating14.6 US tons
Inventory rating11.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2023)
Projected traffic242 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 30B over Indian Lagoon built?

It was built in 1980, making it 45 years old in 2025.

What condition is CR 30B over Indian Lagoon in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does CR 30B over Indian Lagoon carry?

About 220 vehicles per day (2023 count).

How long is CR 30B over Indian Lagoon?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.

Who owns CR 30B over Indian Lagoon?

It is owned by the County Highway Agency.