US Bridges

Business US-41 NB over Mckay Bay

Fair

Hillsborough County, Florida · 1.7 Miles S of SR-60 · Structure no. 100338

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,628 ft
27 main spans
Daily traffic
31,500
2023 count
Owner
State
State Highway Agency

About this bridge

Business US-41 NB over Mckay Bay is a prestressed concrete stringer/multi-beam or girder carrying Business US-41 NB over Mckay Bay in Hillsborough County, Florida. It was built in 1976, so it is 49 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 31,500 vehicles a day, roughly 12% of them trucks, projected to reach 54,653 by 2042. The structure is 1,628 ft (496.3 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesBusiness US-41 NB
CrossesMckay Bay
Location1.7 Miles S of SR-60
RouteU.S. Route 41
CountyHillsborough County
StateFlorida
Coordinates27.93336, -82.43101
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.1 US tons
Inventory rating54.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans27
Design loadHS 20
Structure length1,628 ft (496.3 m)
Longest span118 ft (36 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,500 (2023)
Projected traffic54,653 by 2042
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$165,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Business US-41 NB over Mckay Bay built?

It was built in 1976, making it 49 years old in 2025.

What condition is Business US-41 NB over Mckay Bay 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 March 2023.

How much traffic does Business US-41 NB over Mckay Bay carry?

About 31,500 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Business US-41 NB over Mckay Bay?

The structure is 1,628 ft (496.3 m) long with a longest span of 118 ft (36 m) and a deck 42 ft wide.

Who owns Business US-41 NB over Mckay Bay?

It is owned by the State Highway Agency.