US Bridges

Airport RD.(CR-31) over Rock Creek

Fair

Collier County, Florida · 0.68 Mile North of SR-84 · Structure no. 030186

Built
1979
46 years old
Condition
Fair
inspected March 2024
Type
Slab
Prestressed Concrete
Length
90 ft
3 main spans
Daily traffic
45,473
2024 count
Owner
County
County Highway Agency

About this bridge

Airport RD.(CR-31) over Rock Creek is a prestressed concrete slab carrying Airport RD.(CR-31) over Rock Creek in Collier County, Florida. It was built in 1979, so it is 46 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.

It carries about 45,473 vehicles a day, roughly 10% of them trucks, projected to reach 47,747 by 2044. The structure is 90 ft (27.5 m) long and 97 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAirport RD.(CR-31)
CrossesRock Creek
Location0.68 Mile North of SR-84
RouteCounty Highway 31
CountyCollier County
StateFlorida
Coordinates26.14564, -81.76667
Functional classUrban 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating63.8 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length90 ft (27.5 m)
Longest span30 ft (9.1 m)
Deck width97 ft (29.6 m)
Roadway width80 ft (24.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,473 (2024)
Projected traffic47,747 by 2044
Trucks10%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Airport RD.(CR-31) over Rock Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Airport RD.(CR-31) over Rock 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 March 2024.

How much traffic does Airport RD.(CR-31) over Rock Creek carry?

About 45,473 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Airport RD.(CR-31) over Rock Creek?

The structure is 90 ft (27.5 m) long with a longest span of 30 ft (9.1 m) and a deck 97 ft wide.

Who owns Airport RD.(CR-31) over Rock Creek?

It is owned by the County Highway Agency.