US Bridges

US 1 (sr 5) over Kemp Channel

Fair

Monroe County, Florida · Summerland Key (mm 23.5) · Structure no. 900116

Built
1982
43 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,116 ft
12 main spans
Daily traffic
16,900
2024 count
Owner
State
State Highway Agency

About this bridge

US 1 (sr 5) over Kemp Channel is a prestressed concrete stringer/multi-beam or girder carrying US 1 (sr 5) over Kemp 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 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 16,900 vehicles a day, roughly 17% of them trucks, projected to reach 29,322 by 2044. The structure is 1,116 ft (340.2 m) long and 47 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 1 (sr 5)
CrossesKemp Channel
LocationSummerland Key (mm 23.5)
RouteU.S. Route 1
CountyMonroe County
StateFlorida
Coordinates24.66269, -81.46535
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length1,116 ft (340.2 m)
Longest span93 ft (28.3 m)
Deck width47 ft (14.3 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,900 (2024)
Projected traffic29,322 by 2044
Trucks17%
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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

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

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

What condition is US 1 (sr 5) over Kemp 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 June 2024.

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

About 16,900 vehicles per day (2024 count), of which roughly 17% are trucks.

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

The structure is 1,116 ft (340.2 m) long with a longest span of 93 ft (28.3 m) and a deck 47 ft wide.

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

It is owned by the State Highway Agency.