US Bridges

County Line Rd. over Drainage Canal

Fair

Polk County, Florida · 1.5 MI West of US-17 · Structure no. 164406

Built
1960
65 years old
Condition
Fair
inspected July 2023
Type
Channel Beam
Prestressed Concrete
Length
43 ft
2 main spans
Daily traffic
198
2023 count
Owner
County
County Highway Agency

About this bridge

County Line Rd. over Drainage Canal is a prestressed concrete channel beam carrying County Line Rd. over Drainage Canal in Polk County, Florida. It was built in 1960, so it is 65 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 198 vehicles a day, roughly 14% of them trucks, projected to reach 344 by 2042. The structure is 43 ft (13.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Line Rd.
CrossesDrainage Canal
Location1.5 MI West of US-17
RouteCounty Highway 0
CountyPolk County
StateFlorida
Coordinates27.64621, -81.84475
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30.2 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length43 ft (13.2 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic198 (2023)
Projected traffic344 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 County Line Rd. over Drainage Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Line Rd. over Drainage Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does County Line Rd. over Drainage Canal carry?

About 198 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is County Line Rd. over Drainage Canal?

The structure is 43 ft (13.2 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns County Line Rd. over Drainage Canal?

It is owned by the County Highway Agency.