Napa County, CA

160 public highway bridges

Napa County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Napa County, California contains 160 public highway bridges. Roughly 44.4% are rated “Good,” 46.3% “Fair,” and 4.4% “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.

160
Total Bridges
44.4%
Good
46.3%
Fair
4.4%
Poor Condition

Condition Distribution

Good
44.4% (71)
Fair
46.3% (74)
Poor
4.4% (7)

All Bridges (160)

CALIFORNIA BLVD

Fair

Over: NAPA CREEK

0.2 MI N FIRST ST, Napa, CA

Built 1990 Load: 32.1 t ADT: 13,986

STATE ROUTE 29 SB

Fair

Over: NAPA VALLEY CORPORATE DR

04-NAP-029-R6.63, Napa, CA

Built 1981 Load: 32.4 t ADT: 22,500

STATE ROUTE 29

Fair

Over: STANLEY CREEK

04-NAP-029-R8.33, Napa, CA

Built 1981 Load: 32.4 t ADT: 48,000

SR 121 WB IMOLA AV

Fair

Over: NAPA RIVER

04-NAP-121-R5.30-NAP, Napa, CA

Built 2007 Load: 32.4 t ADT: 13,500

SR 121 EB IMOLA AV

Fair

Over: NAPA RIVER

04-NAP-121-R5.30-NAP, Napa, CA

Built 2007 Load: 32.4 t ADT: 13,500

COOK ROAD

Fair

Over: NAPA RIVER

1.7 MI N RT 49 YNTVL C R, Napa, CA

Built 1959 Load: 32.4 t ADT: 40

SILVERADO TRAIL

Fair

Over: RECTOR CREEK

1 MI N YOUNTVILE CROSS RD, Napa, CA

Built 1957 Load: 32.4 t ADT: 5,450

SILVERADO TRAIL

Fair

Over: SIMMONS CANYON CREEK

0.35 MI NW DUNAWEAL LANE, Napa, CA

Built 1978 Load: 32.4 t ADT: 1,170

SOSCOL AVE

Fair

Over: NAPA RIVER

0.1 MI S FIRST ST, Napa, CA

Built 1980 Load: 32.4 t ADT: 22,690

REDWOOD ROAD

Fair

Over: REDWOOD CREEK

JUST W MT VEEDER RD, Napa, CA

Built 1989 Load: 32.4 t ADT: 673

LAS AMIGAS RD

Fair

Over: CARNEROS CREEK

0.15 MI SW CUTTING WHARF, Napa, CA

Built 1987 Load: 32.4 t ADT: 2,100

POPE CANYON RD

Fair

Over: YOKEL CREEK

S POPE VALLY CROSS RD, Napa, CA

Built 1989 Load: 32.4 t ADT: 1,370

YOUNTVILLE CROSS R

Fair

Over: NAPA RIVER

0.9 MI SW SILVERADO TRAIL, Napa, CA

Built 1985 Load: 32.4 t ADT: 2,580

POPE CANYON ROAD

Fair

Over: POPE CREEK

0.3 MI N CHILES POPE VALY, Napa, CA

Built 1986 Load: 32.4 t ADT: 485

FOURTH AVE

Fair

Over: MURPHY CREEK

0.3 M S/O COOMBSVILLE RD, Napa, CA

Built 1994 Load: 32.4 t ADT: 1,350

SOSCOL AVE

Fair

Over: NAPA RIVER BYPASS

BTWN FIRST AND PEARL STR, Napa, CA

Built 2004 Load: 32.4 t ADT: 18,241

FIRST STREET

Fair

Over: NAPA CR & RIVER OVERFLOW

JUST EAST OF WEST STREET, Napa, CA

Built 2005 Load: 32.4 t ADT: 5,235

DEVLIN ROAD

Fair

Over: NV RR

0.5 MI W&S OF SR 29, Napa, CA

Built 2012 Load: 32.4 t ADT: 1

POPE CANYON ROAD (

Fair

Over: Pope Creek

5 mi NW of Lake Berryessa, Napa, CA

Built 1969 Load: 32.4 t ADT: 25

ATLAS PEAK ROAD

Fair

Over: MILLIKEN CREEK

0.35 MI NW OF SR 121, Napa, CA

Built 1969 Load: 33.0 t ADT: 3,745

BUTTS CANYON RD

Fair

Over: JAMES CREEK

0.1 MI S JAMES CREEK RD, Napa, CA

Built 1986 Load: 33.4 t ADT: 245

OAKVILLE CROSS RD

Fair

Over: CONN CREEK

0.9 MI W SILVERADO TRAIL, Napa, CA

Built 1967 Load: 36.0 t ADT: 483

BIG RANCH ROAD

Fair

Over: SALVADOR OVERFLOW

0.3 MI N TRANCAS ST, Napa, CA

Built 1988 Load: 36.6 t ADT: 8,768

LOMA VISTA DR

Fair

Over: SODA CREEK

1.4 MI N SILVERADO TRAIL, Napa, CA

Built 1953 Load: 37.3 t ADT: 189

HARDMAN AVENUE

Fair

Over: NAPA RIVER OVERFLOW

JUST E OF SILVERADO TRAIL, Napa, CA

Built 1959 Load: 38.9 t ADT: 1,050

LINCOLN AVENUE

Fair

Over: NAPA RIVER

JUST W SR 121, Napa, CA

Built 1956 Load: 40.2 t ADT: 16,188

STATE ROUTE 29 SB

Fair

Over: SUSCOL CREEK

04-NAP-029-R6.08, Napa, CA

Built 1981 Load: 41.5 t ADT: 32,500

STATE ROUTE 121

Fair

Over: CARNEROS CREEK

04-NAP-121-2.40, Napa, CA

Built 1954 Load: 43.1 t ADT: 27,500

KNOXV-BERRYESSA RD

Fair

Over: PUTAH CRK(LK BERRYESSA)

1 MI N/O POPE CANYON RD, Napa, CA

Built 1957 Load: 47.0 t ADT: 530

STATE ROUTE 29 NB

Fair

Over: NAPA VALLEY CORPORATE DR

04-NAP-029-R6.64, Napa, CA

Built 1981 Load: 48.0 t ADT: 22,500

TRANCAS ST

Fair

Over: MILLIKEN CREEK

JUST WEST OF SR 121, Napa, CA

Built 1973 Load: 49.2 t ADT: 9,000

REDWOOD ROAD

Fair

Over: REDWOOD CREEK

S/E OF MT VEEDER RD, Napa, CA

Built 1977 Load: 67.7 t ADT: 1,221

JEFFERSON STREET

Good

Over: NAPA CREEK

AT CEDAR AVE, Napa, CA

Built 1904 Load: 14.9 t ADT: 15,691

SEMINARY ST

Good

Over: NAPA CREEK

AT ARROYO, Napa, CA

Built 1904 Load: 14.9 t ADT: 1,446

STATE ROUTE 29

Good

Over: YORK CREEK

04-NAP-029-29.29-SHLA, Napa, CA

Built 1902 Load: 15.6 t ADT: 20,000

WOODEN VLY CROS RD

Good

Over: SUISUN CREEK

0.06 MI NE WOODEN VALY RD, Napa, CA

Built 1930 Load: 15.9 t ADT: 100

SILVERADO TRAIL

Good

Over: NO NAME CREEK

2.0 MI N/W OAKNOLL AVE, Napa, CA

Built 1930 Load: 16.2 t ADT: 5,450

DUHIG ROAD

Good

Over: HUICHICHA CREEK

0.4 MI S LAS AMIGAS RD, Napa, CA

Built 1930 Load: 16.8 t ADT: 582

LARKMEAD LANE

Good

Over: DUTCH HENRY CREEK

0.4 MI S/W SILVERDO TRAIL, Napa, CA

Built 1910 Load: 16.8 t ADT: 484

AMERICAN CANYON RD

Good

Over: AMERICAN CANYON CREEK

0.1 MI EAST OF SR 29, Napa, CA

Built 1940 Load: 17.2 t ADT: 16,278

AIRPORT RD

Good

Over: FAGAN CREEK

1.0 MI W OF SR 12/29, Napa, CA

Built 1930 Load: 17.2 t ADT: 3,991

BARNETT RD

Good

Over: BURTON CREEK

0.1 MI N POPE VALLEY ROAD, Napa, CA

Built 1930 Load: 17.2 t ADT: 181

OAKVILLE CROSS RD

Good

Over: CONN CREEK OVERFLOW

1.3 MI NE SR 29, Napa, CA

Built 1925 Load: 17.2 t ADT: 970

SILVERADO TRAIL

Good

Over: NAPA RIVER OVERFLOW

0.1 MILES N OF HARDMAN RD, Napa, CA

Built 1930 Load: 21.1 t ADT: 5,450

WEST PUEBLO AVE

Good

Over: REDWOOD CREEK

AT RANCHO DRIVE, Napa, CA

Built 1970 Load: 21.1 t ADT: 1,915

OAK KNOLL AVE

Good

Over: NAPA RIVER

0.3 MI SW SLVRDO TRAIL, Napa, CA

Built 1922 Load: 21.4 t ADT: 2,600

SILVERADO TRAIL

Good

Over: NAPA RIVER OVERFLOW

0.2 MI NORTH HARDMAN RD, Napa, CA

Built 1930 Load: 22.0 t ADT: 5,450

STAGE COACH CYN RD

Good

Over: BUTTS CREEK

3.4 MI E BUTTS CYN RD, Napa, CA

Built 1970 Load: 22.4 t ADT: 41

LARKMEAD LANE

Good

Over: NAPA RIVER

0.6 MI N OF S.R. 29, Napa, CA

Built 1926 Load: 23.0 t ADT: 484

STAGE COACH CYN RD

Good

Over: BUTTS CREEK

3.7 MI E BUTTS CYN RD, Napa, CA

Built 1970 Load: 23.3 t ADT: 41

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.