St. John the Baptist County, LA

40 public highway bridges

St. John the Baptist County Bridge Snapshot

St. John the Baptist County, Louisiana contains 40 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.5% are rated “Good,” 50% “Fair,” 2.5% “Poor,” and 2.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in LA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

40
Total Bridges
32.5%
Good
2.5%
Poor
2.5%
Structurally Deficient

Condition Distribution

Good
32.5% (13)
Fair
50% (20)
Poor
2.5% (1)
SD
2.5% (1)

All Bridges (40)

LA3213

Unknown

Over: GRAMERCY BRIDGE WEST BAN

GRAMERCY, St. John the Baptist, LA

ADT: 2,300

I0010

Unknown

Over: US 51 & SWAMPS

I0010, St. John the Baptist, LA

ADT: 7,615

I0010

Unknown

Over: US 51 & SWAMPS

I0010, St. John the Baptist, LA

ADT: 7,615

I0055

Unknown

Over: I-55 OVER US 51 & SWAMP

I055, St. John the Baptist, LA

ADT: 7,615

I0055

Unknown

Over: I-10 & US 51 & SWAMP

11 Mi S of LA 22, St. John the Baptist, LA

ADT: 63,200

LA3188

Unknown

Over: LA 3188 OVER I-10

2.2 M N OF US 61, St. John the Baptist, LA

ADT: 47,500

I0010

Fair

Over: RESERVE RELIEF CANAL

I 10, St. John the Baptist, LA

Built 1974 Load: 29.0 t ADT: 44,074

I0055

Fair

Over: DRAIN PIPE XING

NORTH OF US 51 & I55 EXIT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAIN PIPE XING

2.0 M N - I55 & US51 EXIT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAIN PIPE XING

2.4 M N - I55 & US51 EXIT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAIN PIPE XING

3 MI N - I55 & US 51 JCT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAIN PIPE XING

M N - US51 & I55 JCT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAIN PIPE XING

7.6 M N - I55 & US51 JCT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: DRAINAGE PIPE XING

2.0 M N -I55 & US51 EXIT, St. John the Baptist, LA

Built 1960 Load: 32.4 t ADT: 4,107

I0055

Fair

Over: I 55 SOUTH ON RAMP RUDDC

0.1 M W OF US 51, St. John the Baptist, LA

Built 1975 Load: 36.3 t ADT: 8,115

St. Andrews Blvd.

Fair

Over: CANAL

1.6 MILES EAST OF LA 3188, St. John the Baptist, LA

Built 1997 Load: 36.9 t ADT: 300

St. Andrews Blvd.

Fair

Over: CANAL

1.6 MILES EAST OF LA 3188, St. John the Baptist, LA

Built 1997 Load: 36.9 t ADT: 300

US0051

Fair

Over: DRAINAGE CANAL

0.1 M NE OF I-55, St. John the Baptist, LA

Built 1975 Load: 38.1 t ADT: 16,686

I0010

Fair

Over: EB ON RAMP (US51)

I0010, St. John the Baptist, LA

Built 1972 Load: 41.7 t ADT: 15,642

US0051

Fair

Over: DRAINAGE CANAL

0.1 M NE OF I-55, St. John the Baptist, LA

Built 1975 Load: 42.6 t ADT: 20,097

I0010

Fair

Over: HOPE CANAL

I0010, St. John the Baptist, LA

Built 1975 Load: 45.4 t ADT: 44,074

I0010

Fair

Over: HOPE CANAL

I0010, St. John the Baptist, LA

Built 1975 Load: 45.4 t ADT: 27,551

I0010

Fair

Over: MISSISSIPPI BAYOU

I0010, St. John the Baptist, LA

Built 1975 Load: 45.4 t ADT: 44,074

I0010

Fair

Over: MISSISSIPPI BAYOU

I0010, St. John the Baptist, LA

Built 1975 Load: 45.4 t ADT: 27,551

I0010

Fair

Over: Drain

0.10 Mi. E. of LA 3188, St. John the Baptist, LA

Built 1984 Load: 74.5 t ADT: 27,372

I0010

Fair

Over: Drain

0.75 Mi. E. of LA 3188, St. John the Baptist, LA

Built 1984 Load: 74.5 t ADT: 27,372

I0055

Good

Over: SWAMP

12.30 MILES NORTH OF JCT, St. John the Baptist, LA

Built 2008 Load: 25.6 t ADT: 27,551

I0055

Good

Over: SWAMP

4.50 MILES NORTH OF JCT I, St. John the Baptist, LA

Built 2008 Load: 25.6 t ADT: 27,551

I0010

Good

Over: RESERVE RELIEF CANAL

I 10, St. John the Baptist, LA

Built 1974 Load: 29.0 t ADT: 27,551

LA3188

Good

Over: DRAIN

1.45 MI. NO. U.S. 61, St. John the Baptist, LA

Built 1983 Load: 32.4 t ADT: 6,064

I0010

Good

Over: WB OFF RAMP (US51)

10.4 Mi. W. of I-310, St. John the Baptist, LA

Built 1972 Load: 34.5 t ADT: 7,896

I0055

Good

Over: I-55 ON RAMP NORTH @ US5

0.1 M W OF US 51, St. John the Baptist, LA

Built 1975 Load: 34.5 t ADT: 15,642

I0055

Good

Over: I-55 OFF RAMP @ US 51

0.1 M N OF US 51, St. John the Baptist, LA

Built 1975 Load: 35.4 t ADT: 15,642

I0055

Good

Over: I-55 NORTH OFF RAMP RUDC

0.1 M W OF US 51, St. John the Baptist, LA

Built 1975 Load: 39.0 t ADT: 187

I0055

Good

Over: I-55 NORTH ON RAMP RUDDC

0.1 M W OF US 51, St. John the Baptist, LA

Built 1975 Load: 39.0 t ADT: 8,115

I0055

Good

Over: SWAMP

0.1 M W OF US 51, St. John the Baptist, LA

Built 1975 Load: 39.0 t ADT: 28,021

Greenwood Dr

Good

Over: CANAL

1.0 MILES SOUTH OF CARROL, St. John the Baptist, LA

Built 2011 Load: 43.4 t ADT: 500

FAIRWAY DRIVE

Good

Over: CANAL

0.82 MI. E. OF LA 3188, St. John the Baptist, LA

Built 2017 Load: 45.7 t ADT: 3,191

Country Club Dr

Good

Over: CANAL

1.6 MILES NORTH OF LA 61, St. John the Baptist, LA

Built 2011 Load: 45.7 t ADT: 100

Hope Canal Rd

Poor

Over: HOPE CANAL

0.38 MILES NORTH OF US.61, St. John the Baptist, LA

Built 1965 Load: 13.6 t

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial