US Bridges

Harbour Drive over Mooring Bay

Good

Collier County, Florida · 0.8 MI W/O US-41 · Structure no. 035250

Built
1965
60 years old, rebuilt 2004
Condition
Good
inspected January 2025
Type
Slab
Prestressed Concrete
Length
110 ft
3 main spans
Daily traffic
5,800
2025 count
Owner
City
City or Municipal Highway Agency

About this bridge

Harbour Drive over Mooring Bay is a prestressed concrete slab carrying Harbour Drive over Mooring Bay in Collier County, Florida. It was built in 1965 and reconstructed in 2004, so it is 60 years old, older 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 5,800 vehicles a day, roughly 5% of them trucks, projected to reach 6,090 by 2045. The structure is 110 ft (33.6 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHarbour Drive
CrossesMooring Bay
Location0.8 MI W/O US-41
RouteCity Street 0
StateFlorida
Coordinates26.18076, -81.81201
Functional classUrban Local

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating88.5 US tons
Inventory rating48.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length110 ft (33.6 m)
Longest span40 ft (12.2 m)
Deck width47 ft (14.3 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2025)
Projected traffic6,090 by 2045
Trucks5%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Harbour Drive over Mooring Bay built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2004.

What condition is Harbour Drive over Mooring Bay 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 January 2025.

How much traffic does Harbour Drive over Mooring Bay carry?

About 5,800 vehicles per day (2025 count), of which roughly 5% are trucks.

How long is Harbour Drive over Mooring Bay?

The structure is 110 ft (33.6 m) long with a longest span of 40 ft (12.2 m) and a deck 47 ft wide.

Who owns Harbour Drive over Mooring Bay?

It is owned by the City or Municipal Highway Agency.