US Bridges

US 1 NB (900003) over Boca Chica Channel

Good

Monroe County, Florida · Boca Chica Key (mm 6.0) · Structure no. 900074

Built
1982
43 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,635 ft
43 main spans
Daily traffic
13,500
2025 count
Owner
State
State Highway Agency

About this bridge

US 1 NB (900003) over Boca Chica Channel is a prestressed concrete stringer/multi-beam or girder carrying US 1 NB (900003) over Boca Chica 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 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 13,500 vehicles a day, roughly 10% of them trucks, projected to reach 23,422 by 2045. The structure is 2,635 ft (803.1 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 1 NB (900003)
CrossesBoca Chica Channel
LocationBoca Chica Key (mm 6.0)
RouteU.S. Route 1
StateFlorida
Coordinates24.57774, -81.71637
Functional classUrban Other Principal Arterial

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating43.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans43
Design loadHS 20
Structure length2,635 ft (803.1 m)
Longest span62 ft (18.9 m)
Deck width49 ft (15 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2025)
Projected traffic23,422 by 2045
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 1 NB (900003) over Boca Chica Channel built?

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

What condition is US 1 NB (900003) over Boca Chica Channel 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 January 2025.

How much traffic does US 1 NB (900003) over Boca Chica Channel carry?

About 13,500 vehicles per day (2025 count), of which roughly 10% are trucks.

How long is US 1 NB (900003) over Boca Chica Channel?

The structure is 2,635 ft (803.1 m) long with a longest span of 62 ft (18.9 m) and a deck 49 ft wide.

Who owns US 1 NB (900003) over Boca Chica Channel?

It is owned by the State Highway Agency.