US Bridges

US 1 (sr 5) over Rockland Channel

Good

Monroe County, Florida · Boca Chica Key (mm 9.6) · Structure no. 900080

Built
1979
46 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,413 ft
16 main spans
Daily traffic
47,000
2024 count
Owner
State
State Highway Agency

About this bridge

US 1 (sr 5) over Rockland Channel is a prestressed concrete stringer/multi-beam or girder carrying US 1 (sr 5) over Rockland Channel in Monroe County, Florida. It was built in 1979, so it is 46 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 47,000 vehicles a day, roughly 12% of them trucks, projected to reach 81,545 by 2044. The structure is 1,413 ft (430.7 m) long and 38 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 1 (sr 5)
CrossesRockland Channel
LocationBoca Chica Key (mm 9.6)
RouteU.S. Route 1
CountyMonroe County
StateFlorida
Coordinates24.59227, -81.66722
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans16
Design loadHS 20
Structure length1,413 ft (430.7 m)
Longest span82 ft (25 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,000 (2024)
Projected traffic81,545 by 2044
Trucks12%
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 Rockland Channel built?

It was built in 1979, making it 46 years old in 2025.

What condition is US 1 (sr 5) over Rockland 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 September 2024.

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

About 47,000 vehicles per day (2024 count), of which roughly 12% are trucks.

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

The structure is 1,413 ft (430.7 m) long with a longest span of 82 ft (25 m) and a deck 38 ft wide.

Who owns US 1 (sr 5) over Rockland Channel?

It is owned by the State Highway Agency.