US Bridges

US 1 (sr 5) over North Pine Channel

Fair

Monroe County, Florida · Big Pine Key (mm 29.6) · Structure no. 900110

Built
1982
43 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
746 ft
8 main spans
Daily traffic
18,000
2024 count
Owner
State
State Highway Agency

About this bridge

US 1 (sr 5) over North Pine Channel is a prestressed concrete stringer/multi-beam or girder carrying US 1 (sr 5) over North Pine Channel in Monroe County, Florida. It was built in 1982, so it is 43 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 5 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 18,000 vehicles a day, roughly 18% of them trucks, projected to reach 31,230 by 2042. The structure is 746 ft (227.5 m) long and 46 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 1 (sr 5)
CrossesNorth Pine Channel
LocationBig Pine Key (mm 29.6)
RouteU.S. Route 1
CountyMonroe County
StateFlorida
Coordinates24.66934, -81.37305
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length746 ft (227.5 m)
Longest span93 ft (28.3 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2024)
Projected traffic31,230 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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$44,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 (sr 5) over North Pine Channel built?

It was built in 1982, making it 43 years old in 2025.

What condition is US 1 (sr 5) over North Pine Channel 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 September 2024.

How much traffic does US 1 (sr 5) over North Pine Channel carry?

About 18,000 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is US 1 (sr 5) over North Pine Channel?

The structure is 746 ft (227.5 m) long with a longest span of 93 ft (28.3 m) and a deck 46 ft wide.

Who owns US 1 (sr 5) over North Pine Channel?

It is owned by the State Highway Agency.