St. Tammany County, LA
360 public highway bridges
St. Tammany County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, St. Tammany County, Louisiana contains 360 public highway bridges. Roughly 29.7% are rated “Good,” 53.1% “Fair,” and 5.6% “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.
Condition Distribution
All Bridges (360)
LA1088
UnknownOver: I 12
3.4 Mi NE of LA 59, St. Tammany, LA
US0190
UnknownOver: LA 22
2.4 Mi S of I-12, St. Tammany, LA
US0190-B
UnknownOver: INTERSTATE 10
1.85 MILES EAST OF JCT US, St. Tammany, LA
US0190
UnknownOver: US190B/LA21/Bouge Falaya
US0190, St. Tammany, LA
OAK HARBOR BLVD
UnknownOver: I-10
1.0M N LAKE PONTCHARTRAIN, St. Tammany, LA
I0010
UnknownOver: LA 433
8.8 Mi NE of US 11, St. Tammany, LA
I0010
UnknownOver: LA 433
1.6 MI S OF US 190, St. Tammany, LA
I0010
UnknownOver: US 190
1 Mi N of US 190-B, St. Tammany, LA
I0010
UnknownOver: US 190
1.5 MI S OF I-12, St. Tammany, LA
I0010
UnknownOver: I-10 OVER I-59 NB LANE
I0010, St. Tammany, LA
BROWNSWITCH RD
UnknownOver: I-59
0.4 MI E OF LA 1091, St. Tammany, LA
I0059
UnknownOver: WEST PEARL RIVER
5.2 MI NO I-10 & I-59 INT, St. Tammany, LA
I0059
UnknownOver: WEST PEARL RIVER
5.2 MI NO.I-12 & I-10 INT, St. Tammany, LA
I0059
UnknownOver: E. PEARL RIV,FRONTAGE RD
8.2 Mi N OF US 11, St. Tammany, LA
I0059
UnknownOver: E. PEARL RIV,FRONTAGE RD
0.6 MI SW of US 11, St. Tammany, LA
I0012
UnknownOver: I-12 OVER LA 21
2.2 M E OF LA 1077, St. Tammany, LA
I0012
UnknownOver: I-12 OVER LA 21
2.2 M E OF LA 1077, St. Tammany, LA
I0012
UnknownOver: I12 OVER US 190
2.6 M W OF LA 59, St. Tammany, LA
I0012
UnknownOver: US 190
2.6 M W OF LA 59, St. Tammany, LA
I0012 RAMP A
UnknownOver: US 190
2.6 M W OF LA 59, St. Tammany, LA
I0012 RAMP B
UnknownOver: US 190
2.6 M W OF LA 59, St. Tammany, LA
I0012
UnknownOver: LA 59
2.7 M E OF US 190, St. Tammany, LA
I0012
UnknownOver: LA 59
2.7 M E OF US 190, St. Tammany, LA
FISH HATCHERY RD.
UnknownOver: I-12
1.0 M W OF LA 434, St. Tammany, LA
DIXIE RANCH RD.
UnknownOver: I-12
4.2 M E OF LA 434, St. Tammany, LA
AIRPORT ROAD
UnknownOver: I-12
6.2 M E OF LA 434, St. Tammany, LA
I0012
UnknownOver: DONYA ST/CANAL
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER US 11
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER US 11
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER I-59 SB
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER I-59 SB
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 RAMP OVER I-59 SB
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER I-59 NB
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER I-59 NB
I0012, St. Tammany, LA
I0012
UnknownOver: I-12 OVER I-10
I0010, St. Tammany, LA
LA1085
UnknownOver: LA 1085 OVER I-12
LA1085, St. Tammany, LA
LA1077
UnknownOver: LA 1077 OVER I-12
LA1077, St. Tammany, LA
LA1088
UnknownOver: I-12
2.5 M E OF LA 59, St. Tammany, LA
LA0434
UnknownOver: I-12
2.6 MI N OF US 190, St. Tammany, LA
LA1091
UnknownOver: LA 1091 OVER I-12
LA1091, St. Tammany, LA
LA1090
UnknownOver: I-10
0.7 M N OF US 190, St. Tammany, LA
LA1090
UnknownOver: LA 1090 OVER I-59
LA1090, St. Tammany, LA
LA0434
FairOver: BAYOU LACOMBE
2.5 Miles South of LA 36, St. Tammany, LA
Smith Rd
FairOver: LITTLE BOGUE FALAYA RIVE
1.2 MI N/W JCT LA1082 &21, St. Tammany, LA
LA0036
FairOver: BAYOU LACOMBE
LA0036, St. Tammany, LA
Corin Pkwy.
FairOver: BAYOU
CITY OF MANDEVILLE, St. Tammany, LA
Hickory Dr
FairOver: CANAL/CREEK
0.2M EAST OF PONTCHR, St. Tammany, LA
LA0040
FairOver: MORGAN BRANCH
1.0 M E OF LA 1077, St. Tammany, LA
Bruhl Rd
FairOver: BOGUE FALAYA RIVER
1.5 M EAST OF LA 25, St. Tammany, LA
Carrey St
FairOver: CREEK
0.35 MI NE OF US 11, St. Tammany, LA
Read our methodology - how this data is sourced, computed, and verified.
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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.