US Bridges

Blackmore Court over Clam Bay

Poor

Collier County, Florida · 0.1 MI N/O Spinnaker DR · Structure no. 034119

Built
1972
53 years old
Condition
Poor
inspected January 2025
Type
Slab
Prestressed Concrete
Length
101 ft
3 main spans
Daily traffic
1,100
2025 count
Owner
City
City or Municipal Highway Agency

About this bridge

Blackmore Court over Clam Bay is a prestressed concrete slab carrying Blackmore Court over Clam Bay in Collier County, Florida. It was built in 1972, so it is 53 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,100 vehicles a day, roughly 1% of them trucks, projected to reach 2,554 by 2045. The structure is 101 ft (30.8 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesBlackmore Court
CrossesClam Bay
Location0.1 MI N/O Spinnaker DR
RouteCity Street 0
CountyCollier County
StateFlorida
Coordinates25.95111, -81.74367
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span33 ft (10.2 m)
Deck width31 ft (9.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,100 (2025)
Projected traffic2,554 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Blackmore Court over Clam Bay built?

It was built in 1972, making it 53 years old in 2025.

What condition is Blackmore Court over Clam Bay in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does Blackmore Court over Clam Bay carry?

About 1,100 vehicles per day (2025 count), of which roughly 1% are trucks.

How long is Blackmore Court over Clam Bay?

The structure is 101 ft (30.8 m) long with a longest span of 33 ft (10.2 m) and a deck 31 ft wide.

Who owns Blackmore Court over Clam Bay?

It is owned by the City or Municipal Highway Agency.