Total bridges
192
Public highway bridges in El Dorado County
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.
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.
When El Dorado County's bridges were built
192 bridges with a recorded construction year, grouped by decade
- 1910s 5
1910–1919
5 bridges
- 1920s 8
1920–1929
8 bridges
- 1930s
1930–1939
16 bridges
- 1940s 8
1940–1949
8 bridges
- 1950s
1950–1959
21 bridges
- 1960s
1960–1969
39 bridges
- 1970s 13
1970–1979
13 bridges
- 1980s 9
1980–1989
9 bridges
- 1990s
1990–1999
20 bridges
- 2000s
2000–2009
22 bridges
- 2010s
2010–2019
22 bridges
- 2020s 9
2020–2029
9 bridges
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.
| 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.
Poor-condition bridges (12)
CONSUMNES MINE RD
PoorOver: NORTH FK COSUMNES RIVER
4.0 MI N/O GRIZZILY FT RD, El Dorado, CA
Built 1958 Load: 0.0 t ADT: 950
MOSQUITO RD
PoorOver: SOUTH FK AMERICAN RIVER
5.7 MI NORTH OF US 50, El Dorado, CA
Built 1939 Load: 5.2 t ADT: 1,055
BREEDLOVE ROAD
PoorOver: CANYON CREEK
1.0 MI N/O WENTWORTH S RD, El Dorado, CA
Built 1940 Load: 5.5 t ADT: 250
18023: MELSONS COR
PoorOver: Perry Creek
10 mi SE of Placerville, El Dorado, CA
Built 1955 Load: 7.5 t ADT: 5
GRIZZLY FLAT ROAD
PoorOver: STEELY FK COSUMNES RIVER
7.0 MI E OF MT AUKUM RD, El Dorado, CA
Built 1936 Load: 10.4 t ADT: 2,080
GREEN VALLEY ROAD
PoorOver: MOUND SPRINGS CREEK
0.8 MI W MISSOURI FLAT R, El Dorado, CA
Built 1935 Load: 16.2 t ADT: 4,351
GARDEN VALLEY RD
PoorOver: JOHNTOWN CREEK
3.5 MI NE OF S.R. 193, El Dorado, CA
Built 1928 Load: 16.8 t ADT: 1,391
GREENWOOD ROAD
PoorOver: NORTH BRNCH GREENWOOD CR
0.3 MI S OF S.R. 193, El Dorado, CA
Built 1927 Load: 17.2 t ADT: 962
U.S. HIGHWAY 50
PoorOver: SNOW ROAD
03-ED-050-25.26, El Dorado, CA
Built 1957 Load: 18.5 t ADT: 20,300
U.S. HIGHWAY 50
PoorOver: SOUTH FORK AMERICAN RIV
03-ED-050-R44.12, El Dorado, CA
Built 1990 Load: 32.4 t ADT: 13,100
MISSOURI FLAT ROAD
PoorOver: US HIGHWAY 50
03-ED-050-R15.06, El Dorado, CA
Built 2008 Load: 32.4 t ADT: 60,000
NEWTOWN ROAD
PoorOver: U.S. HIGHWAY 50
03-ED-050-20.74, El Dorado, CA
Built 1961 Load: 34.0 t ADT: 5,000
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.