US Bridges

CR-611 NB over Alligator Creek

Good

Pinellas County, Florida · 1.3 MI North of SR-60 · Structure no. 154138

Built
1990
35 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
20,750
2023 count
Owner
County
County Highway Agency

About this bridge

CR-611 NB over Alligator Creek is a prestressed concrete stringer/multi-beam or girder carrying CR-611 NB over Alligator Creek in Pinellas County, Florida. It was built in 1990, so it is 35 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,750 vehicles a day, roughly 4% of them trucks, projected to reach 36,002 by 2042. The structure is 135 ft (41.1 m) long and 68 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCR-611 NB
CrossesAlligator Creek
Location1.3 MI North of SR-60
RouteCounty Highway 611
CountyPinellas County
StateFlorida
Coordinates27.97897, -82.70883
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span45 ft (13.7 m)
Deck width68 ft (20.7 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,750 (2023)
Projected traffic36,002 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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-611 NB over Alligator Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is CR-611 NB over Alligator Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does CR-611 NB over Alligator Creek carry?

About 20,750 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is CR-611 NB over Alligator Creek?

The structure is 135 ft (41.1 m) long with a longest span of 45 ft (13.7 m) and a deck 68 ft wide.

Who owns CR-611 NB over Alligator Creek?

It is owned by the County Highway Agency.