Monroe County, FL

100 public highway bridges

Monroe County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Monroe County, Florida contains 100 public highway bridges. Roughly 33% are rated “Good,” 58% “Fair,” and 7% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

100
Total Bridges
33%
Good
58%
Fair
7%
Poor Condition

Condition Distribution

Good
33% (33)
Fair
58% (58)
Poor
7% (7)

All Bridges (100)

US 1 (SR 5)

Fair

Over: INDIAN KEY CHANNEL

MATECUMBE KEY (MM 78.0), Monroe, FL

Built 1981 Load: 43.5 t ADT: 15,800

US-1 (SR-5)

Fair

Over: VACA CUT

MARATHON KEY (MM 53.2), Monroe, FL

Built 1982 Load: 43.5 t ADT: 25,000

US-1 (SR-5)

Fair

Over: OHIO MISSOURI CHANNEL

OHIO KEY (MM 39.1), Monroe, FL

Built 1981 Load: 44.7 t ADT: 11,300

US 1 (SR 5)

Fair

Over: KEMP CHANNEL

SUMMERLAND KEY (MM 23.5), Monroe, FL

Built 1982 Load: 44.8 t ADT: 16,900

US 1 (SR 5)

Fair

Over: NORTH PINE CHANNEL

BIG PINE KEY (MM 29.6), Monroe, FL

Built 1982 Load: 45.0 t ADT: 18,000

US 1 (SR 5)

Fair

Over: TEA TABLE CHANNEL

MATECUMBE KEY (MM 79.1), Monroe, FL

Built 1980 Load: 46.1 t ADT: 15,800

US 1 (SR 5)

Fair

Over: SADDLE BUNCH #4

N BOCA CHICA KEY(MM 13.1), Monroe, FL

Built 1980 Load: 47.4 t ADT: 16,900

US 1 (NB & SB)

Fair

Over: MANATEE CREEK

US 1 (MM 113), Monroe, FL

Built 2008 Load: 48.4 t ADT: 26,500

Harbour Drive

Fair

Over: Joes Canal

1.1Miles E of SR5 MM 61.1, Monroe, FL

Built 1955 Load: 65.3 t ADT: 517

Seaview Drive

Fair

Over: Duck Key Canal

1.4Miles E of US-1 MM61, Monroe, FL

Built 1955 Load: 65.3 t ADT: 530

Ramp to Pigeon Key

Good

Over: Pigeon Key

Pigeon Key, Monroe, FL

Built 1938 ADT: 101

US 1 (SR 5)

Good

Over: TOM'S HARBOR CHANNEL

DUCK KEY (MM 60.4), Monroe, FL

Built 1980 Load: 29.8 t ADT: 12,700

Watson Blvd Old

Good

Over: Watson Cut

2 miles W of SR5 MM 30.5, Monroe, FL

Built 1960 Load: 30.5 t ADT: 2,060

117th Street

Good

Over: Vaca Channel # 1

200Ft. S of US1 MM 53.1, Monroe, FL

Built 1967 Load: 32.7 t ADT: 288

WATSON RD

Good

Over: TIDAL SLOUGH

BIG PINE KEY, Monroe, FL

Built 2001 Load: 32.7 t ADT: 40

Shore Drive

Good

Over: Canal

0.2 Mile E of US1 MM17, Monroe, FL

Built 1991 Load: 33.6 t ADT: 237

Watson Blvd

Good

Over: Un-Named Channel

0.5Mi. N of Key Deer Blvd, Monroe, FL

Built 1965 Load: 35.9 t ADT: 2,060

US 1 (SR 5)

Good

Over: SADDLE BUNCH #5

N BOCA CHICA KEY(MM 12.5), Monroe, FL

Built 1980 Load: 37.0 t ADT: 16,900

US 1 NB (900130)

Good

Over: MARVIN D. ADAMS WATERWAY

KEY LARGO (MM 103.6), Monroe, FL

Built 1973 Load: 37.4 t ADT: 15,126

SR-5 (US-1)

Good

Over: Snake Creek Canal

Plantation Key (MM 85.5), Monroe, FL

Built 1981 Load: 37.6 t ADT: 20,700

US-1 NB (900125)

Good

Over: COW KEY CHANNEL

KEY WEST (MM 4.1), Monroe, FL

Built 1978 Load: 38.2 t ADT: 23,000

US 1 (SR 5)

Good

Over: ROCKLAND CHANNEL

BOCA CHICA KEY (MM 9.6), Monroe, FL

Built 1979 Load: 38.7 t ADT: 47,000

US 1 NB (900003)

Good

Over: BOCA CHICA CHANNEL

BOCA CHICA KEY (MM 6.0), Monroe, FL

Built 1982 Load: 39.4 t ADT: 13,500

US 1 (SR 5)

Good

Over: JEWFISH CREEK

NB OFF RAMP TO ROTARY, Monroe, FL

Built 2008 Load: 39.6 t ADT: 100

US 1 (SR 5)

Good

Over: JEWFISH CREEK

NB OFF RAMP TO US-1, Monroe, FL

Built 2008 Load: 39.6 t ADT: 80

Palm Drive

Good

Over: Bay Point Canal

0.3 Mile E of US-1 MM14.8, Monroe, FL

Built 1975 Load: 39.8 t ADT: 593

US 1 (SR 5)

Good

Over: LIGNUMVITAE CHANNEL

MATECUMBE KEY (MM 77.5), Monroe, FL

Built 1981 Load: 40.3 t ADT: 15,800

SR-A1A (Key West)

Good

Over: RIVIERA CANAL

SR A1A (MM 2.5), Monroe, FL

Built 1960 Load: 40.5 t ADT: 12,300

US 1 (SR 5)

Good

Over: HARRIS GAP CHANNEL

SUGARLOAF KEY (MM 17.5), Monroe, FL

Built 1982 Load: 40.5 t ADT: 17,600

US 1 SB (900073)

Good

Over: MARVIN D. ADAMS WATERWAY

KEY LARGO (MM 103.6), Monroe, FL

Built 1993 Load: 40.6 t ADT: 15,126

US 1 (SR 5)

Good

Over: PARK CHANNEL

SUGARLOAF KEY (MM 18.6), Monroe, FL

Built 1982 Load: 41.7 t ADT: 17,600

US 1 (SR 5)

Good

Over: JEWFISH CREEK

SB ON RAMP TO US-1, Monroe, FL

Built 2008 Load: 43.4 t ADT: 150

US 1 (SR 5)

Good

Over: JEWFISH CREEK

SB OFF RAMP TO ROTARY, Monroe, FL

Built 2007 Load: 43.5 t ADT: 60

US 1(SR 5)FRNTG RD

Good

Over: CROCODILE CROSSING

JUST N/O JEWFISH CREEK, Monroe, FL

Built 2008 Load: 44.1 t ADT: 400

US 1 (SR 5)

Good

Over: SOUTH PINE CHANNEL

N OF TORCH KEY (MM 28.8), Monroe, FL

Built 1982 Load: 45.0 t ADT: 18,000

Bimini Drive

Good

Over: Sams Canal

1Mile E of SR5 at MM 61.1, Monroe, FL

Built 1955 Load: 45.1 t ADT: 539

US 1 (SR 5)

Good

Over: JEWFISH CREEK

US 1 (M.M. 107), Monroe, FL

Built 2008 Load: 47.0 t ADT: 26,500

US 1 (SR 5)

Good

Over: SADDLE BUNCH #3 CHANNEL

N BOCA CHICA KEY (MM14.2), Monroe, FL

Built 1981 Load: 47.4 t ADT: 17,600

US-1 (SR 5)

Good

Over: WHALE HARBOR

ISLAMORADA KEY (MM 83.8), Monroe, FL

Built 1951 Load: 48.6 t ADT: 20,700

US-1 SB (900086)

Good

Over: COW KEY CHANNEL

KEY WEST (MM 4.1), Monroe, FL

Built 1985 Load: 49.4 t ADT: 23,000

US 1 (SR 5)

Good

Over: FIRST DEER CROSSING

BIG PINE KEY (MM 31.4), Monroe, FL

Built 2002 Load: 52.5 t ADT: 13,200

US 1 (SR 5)

Good

Over: SECOND DEER CROSSING

BIG PINE KEY (MM 32.4), Monroe, FL

Built 2002 Load: 52.5 t ADT: 13,200

US 1 SB (900078)

Good

Over: TAVERNIER CREEK

TAVERNIER KEY (MM 90.8), Monroe, FL

Built 1993 Load: 56.0 t ADT: 15,000

PIGEON KEY ACCESS

Poor

Over: KNIGHT CHANNEL

MARATHON KEY (MM 47), Monroe, FL

Built 1912

117th Street

Poor

Over: Vaca Channel #2

450Ft. S of US-1 MM53.1, Monroe, FL

Built 1967 Load: 7.5 t ADT: 294

Card Sound Road

Poor

Over: Mosquito Creek

3.8 Miles N of CR905, Monroe, FL

Built 1969 Load: 10.4 t ADT: 3,182

Card Sound Road

Poor

Over: Tubbys Creek

3.1 Miles N of CR905, Monroe, FL

Built 1969 Load: 18.3 t ADT: 3,182

CR-941 Boca Chica

Poor

Over: Similar Sound Local Cnl

0.6 Mile E of US1 MM 10.7, Monroe, FL

Built 1957 Load: 28.8 t ADT: 2,230

CR-939B

Poor

Over: Unnamed Sugarloaf Canal

0.3 Mile S of CR-939A, Monroe, FL

Built 1968 Load: 30.8 t ADT: 2

CR939 Sugarloaf B.

Poor

Over: Un-Named Channel

0.8 Mile E of US-1 MM 17, Monroe, FL

Built 1961 Load: 31.5 t ADT: 592

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.