US Bridges

CR-846 over Drainage Canal

Good

Collier County, Florida · 0.6 MI E/O SR-29 · Structure no. 034831

Built
2023
2 years old
Condition
Good
inspected January 2025
Type
Slab
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
4,900
2025 count
Owner
County
County Highway Agency

About this bridge

CR-846 over Drainage Canal is a prestressed concrete slab carrying CR-846 over Drainage Canal in Collier County, Florida. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,900 vehicles a day, roughly 10% of them trucks, projected to reach 7,400 by 2045. The structure is 100 ft (30.5 m) long and 69 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesCR-846
CrossesDrainage Canal
Location0.6 MI E/O SR-29
RouteCounty Highway 846
CountyCollier County
StateFlorida
Coordinates26.41851, -81.40134
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating67.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length100 ft (30.5 m)
Longest span33 ft (10.1 m)
Deck width69 ft (20.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic4,900 (2025)
Projected traffic7,400 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 CR-846 over Drainage Canal built?

It was built in 2023, making it 2 years old in 2025.

What condition is CR-846 over Drainage Canal 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 CR-846 over Drainage Canal carry?

About 4,900 vehicles per day (2025 count), of which roughly 10% are trucks.

How long is CR-846 over Drainage Canal?

The structure is 100 ft (30.5 m) long with a longest span of 33 ft (10.1 m) and a deck 69 ft wide.

Who owns CR-846 over Drainage Canal?

It is owned by the County Highway Agency.