US Bridges

CR-92 San Marco RD over Marco Channel

Fair

Collier County, Florida · 6.5MI South of US-41 · Structure no. 030184

Built
1975
50 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,841 ft
22 main spans
Daily traffic
3,000
2023 count
Owner
County
County Highway Agency

About this bridge

CR-92 San Marco RD over Marco Channel is a prestressed concrete stringer/multi-beam or girder carrying CR-92 San Marco RD over Marco Channel in Collier County, Florida. It was built in 1975, so it is 50 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 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 3,000 vehicles a day, roughly 5% of them trucks, projected to reach 5,000 by 2042. The structure is 1,841 ft (561 m) long and 47 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesCR-92 San Marco RD
CrossesMarco Channel
Location6.5MI South of US-41
RouteCounty Highway 92
CountyCollier County
StateFlorida
Coordinates25.93283, -81.65353
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.8 US tons
Inventory rating34.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans22
Design loadHS 20
Structure length1,841 ft (561 m)
Longest span116 ft (35.4 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic5,000 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was CR-92 San Marco RD over Marco Channel built?

It was built in 1975, making it 50 years old in 2025.

What condition is CR-92 San Marco RD over Marco Channel 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 February 2025.

How much traffic does CR-92 San Marco RD over Marco Channel carry?

About 3,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is CR-92 San Marco RD over Marco Channel?

The structure is 1,841 ft (561 m) long with a longest span of 116 ft (35.4 m) and a deck 47 ft wide.

Who owns CR-92 San Marco RD over Marco Channel?

It is owned by the County Highway Agency.