US Bridges

Monument Avenue over 18th ST Canal

FairPosted for load

Gulf County, Florida · 0.18 MI South of 16th ST · Structure no. 510019

Built
1953
72 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
76 ft
5 main spans
Daily traffic
212
2022 count
Owner
County
County Highway Agency

About this bridge

Monument Avenue over 18th ST Canal is a concrete slab carrying Monument Avenue over 18th ST Canal in Gulf County, Florida. It was built in 1953, so it is 72 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 212 vehicles a day, roughly 1% of them trucks, projected to reach 233 by 2042. The structure is 76 ft (23.3 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMonument Avenue
Crosses18th ST Canal
Location0.18 MI South of 16th ST
RouteCounty Highway 0
CountyGulf County
StateFlorida
Coordinates29.79824, -85.29796
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20 US tons
Inventory rating12.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length76 ft (23.3 m)
Longest span16 ft (4.8 m)
Deck width38 ft (11.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic212 (2022)
Projected traffic233 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Monument Avenue over 18th ST Canal built?

It was built in 1953, making it 72 years old in 2025.

What condition is Monument Avenue over 18th ST Canal 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 Monument Avenue over 18th ST Canal carry?

About 212 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Monument Avenue over 18th ST Canal?

The structure is 76 ft (23.3 m) long with a longest span of 16 ft (4.8 m) and a deck 38 ft wide.

Who owns Monument Avenue over 18th ST Canal?

It is owned by the County Highway Agency.