County profile · official public datasets

El Dorado County, CA

192 public highway bridges tracked in the FHWA National Bridge Inventory: 46.9% rated Good, 46.9% Fair, 6.3% Poor.

192
Public bridges: 46.9%
Good condition: 6.3%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

El Dorado County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 41%
lowest Poor share in state: 6.3%
Poor-condition share: 192
public highway bridges: 1975
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

El Dorado County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, El Dorado County ranks #24 of 58 California counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). El Dorado County, California contains 192 public highway bridges. Roughly 46.9% are rated “Good,” 46.9% “Fair,” and 6.3% “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.

Total bridges

192

Public highway bridges in El Dorado County

Good condition

46.9%

90 of 192 rated 7-9

Fair condition

46.9%

90 of 192 rated 5-6

Poor condition

6.3%

12 of 192 rated 4 or below

In-state Poor-share rank

#24 of 58

Among California counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 192 NBI-tracked bridges by lowest applicable component rating.

Good

46.9% (90)

Fair

46.9% (90)

Poor

6.3% (12)

El Dorado County's Poor-condition bridges carry 109,444 vehicle crossings a day

That is 7.4% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 9,120 crossings a day against 7,871 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 192 of 192 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

54.2% of El Dorado County's bridges have passed the 50-year mark

104 of the 192 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 46.9% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 54.8% of the county's Poor-condition bridge traffic

MISSOURI FLAT ROAD over US HIGHWAY 50, built 2008, carries 60,000 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 12-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 109,444 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

5
1920s

8
1930s

16
1940s

8
1950s

21
1960s

39
1970s

13
1980s

9
1990s

20
2000s

22
2010s

22
2020s

9

What this shows Construction peaked in the 1960s, when 39 of the county's bridges still in the inventory were built, which is 20.3% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1975, 5 years newer than the California average of 1970.

How El Dorado County compares with California's closest counties by inventory size

The 5 California counties nearest El Dorado County in number of bridges, with their condition splits. Its 6.3% Poor share is the 3rd-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1967 is 8 years newer.

Showing the 5 closest of 57 California counties eligible for comparison.

Bridge inventory size and condition shares for El Dorado County and the 5 California counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Colusa County	211	40.8%	52.1%	7.1%	1968
Marin County	207	43.5%	46.9%	9.7%	1958
Trinity County	194	56.2%	39.7%	4.1%	1977
Santa Cruz County	192	40.1%	42.2%	17.7%	1963
El Dorado County (this page)	192	46.9%	46.9%	6.3%	1975
Kings County	168	40.5%	53.6%	6%	1968

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to El Dorado County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for El Dorado County, both outside California so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside CA (192 bridges here).

Barbour County, AL · 192 bridges
Morgan County, CO · 192 bridges
Kent County, DE · 192 bridges
Santa Rosa County, FL · 192 bridges

Similar average build year

Nearest mean year-built outside CA (1975 here).

Lane County, OR · avg 1975 · 1,010 bridges
Fulton County, GA · avg 1975 · 775 bridges
Westmoreland County, PA · avg 1975 · 620 bridges
Monroe County, NY · avg 1975 · 615 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 192 Good 90 Fair 90 Poor 12

Good-condition bridges (90)

Sort:

El Dorado County Bridge Snapshot

Condition distribution

El Dorado County's Poor-condition bridges carry 109,444 vehicle crossings a day

54.2% of El Dorado County's bridges have passed the 50-year mark

One structure carries 54.8% of the county's Poor-condition bridge traffic

How El Dorado County compares with California's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (90)

NO DATA ENTERED

WINDING ROAD

NO DATA ENTERED

WINDING ROAD

11N74

WINDING ROAD

PLUM CREEK RD

FOUNTAIN PLACE RD

NO DATA ENTERED

NO DATA ENTERED

NO DATA ENTERED

WINDING ROAD

ICE HOUSE RD

TRAVERSE CREEK RD

CRYSTAL SPRINGS RD

OAK HILL ROAD

WINDING ROAD

11N46

VENICE DR

NORTH SOUTH ROAD

U.S. HIGHWAY 50

CARSON ROAD

U.S. HIGHWAY 50

U.S. HIGHWAY 50

WINDING ROAD

U.S. HIGHWAY 50 WB

WINDING ROAD

STATE ROUTE 49

MOUNT AUKUM ROAD

U.S. HIGHWAY 50

U.S. HIGHWAY 50

US HIGHWAY 50

US HIGHWAY 50

US HIGHWAY 50

STATE ROUTE 193

STATE ROUTE 49

U.S. HIGHWAY 50

WB 50 ON-RAMP

STATE ROUTE 89

RED HAWK PKWY RAMP

US HIGHWAY 50 WB

US HIGHWAY 50 EB

US HIGHWAY 50

HWY 50

US HIGHWAY 50

SILVA PARKWAY

WB 50 OFF-RAMP

U.S. HIGHWAY 50

U.S. HIGHWAY 50

U.S. HIGHWAY 50

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