US Bridges

17th ST Northwest over Lake Mirror Canal

Good

Polk County, Florida · 0.4 MI North of CR-542 · Structure no. 167007

Built
2013
12 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
27 ft
1 main span
Daily traffic
2,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

17th ST Northwest over Lake Mirror Canal is a concrete culvert carrying 17th ST Northwest over Lake Mirror Canal in Polk County, Florida. It was built in 2013, so it is 12 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 2,300 vehicles a day, roughly 4% of them trucks, projected to reach 3,990 by 2042. The structure is 27 ft (8.1 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries17th ST Northwest
CrossesLake Mirror Canal
Location0.4 MI North of CR-542
RouteCity Street 0
StateFlorida
Coordinates28.03872, -81.74616
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length27 ft (8.1 m)
Longest span27 ft (8.1 m)
Deck width33 ft (10.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic3,990 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 17th ST Northwest over Lake Mirror Canal built?

It was built in 2013, making it 12 years old in 2025.

What condition is 17th ST Northwest over Lake Mirror 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 November 2023.

How much traffic does 17th ST Northwest over Lake Mirror Canal carry?

About 2,300 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is 17th ST Northwest over Lake Mirror Canal?

The structure is 27 ft (8.1 m) long with a longest span of 27 ft (8.1 m) and a deck 33 ft wide.

Who owns 17th ST Northwest over Lake Mirror Canal?

It is owned by the City or Municipal Highway Agency.