US Bridges

County Line RD over I 275 NB

Good

Hillsborough County, Florida · 2.5 Miles W of CR-581 · Structure no. 100493

Built
1985
40 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
158 ft
3 main spans
Daily traffic
19,000
2023 count
Owner
State
State Highway Agency

About this bridge

County Line RD over I 275 NB is a prestressed concrete stringer/multi-beam or girder carrying County Line RD over I 275 NB in Hillsborough County, Florida. It was built in 1985, so it is 40 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 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 19,000 vehicles a day, roughly 9% of them trucks, projected to reach 32,965 by 2042. The structure is 158 ft (48.2 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty Line RD
CrossesI 275 NB
Location2.5 Miles W of CR-581
RouteCounty Highway 0
CountyHillsborough County
StateFlorida
Coordinates28.17124, -82.39236
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length158 ft (48.2 m)
Longest span88 ft (26.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2023)
Projected traffic32,965 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Line RD over I 275 NB built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Line RD over I 275 NB 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 September 2023.

How much traffic does County Line RD over I 275 NB carry?

About 19,000 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is County Line RD over I 275 NB?

The structure is 158 ft (48.2 m) long with a longest span of 88 ft (26.8 m) and a deck 43 ft wide.

Who owns County Line RD over I 275 NB?

It is owned by the State Highway Agency.