Total bridges
337
Public highway bridges in Placer County
County profile · official public datasets
Placer County, CA
337 public highway bridges tracked in the FHWA National Bridge Inventory: 44.2% rated Good, 51.6% Fair, 4.2% Poor.
- 337
- Public bridges
- 44.2%
- Good condition
- 4.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Placer County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 19%
- lowest Poor share in state
- 4.2%
- Poor-condition share
- 337
- public highway bridges
- 1976
- 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.
Placer County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Placer County ranks #11 of 58 California counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.2%). Placer County, California contains 337 public highway bridges. Roughly 44.2% are rated “Good,” 51.6% “Fair,” and 4.2% “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
44.2%
149 of 337 rated 7-9
Fair condition
51.6%
174 of 337 rated 5-6
Poor condition
4.2%
14 of 337 rated 4 or below
In-state Poor-share rank
#11 of 58
Among California counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 337 NBI-tracked bridges by lowest applicable component rating.
Good 44.2% (149)
Fair 51.6% (174)
Poor 4.2% (14)
Placer County's Poor-condition bridges carry 227,371 vehicle crossings a day
That is 5.4% of the county's reported daily bridge traffic on 4.2% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 16,241 crossings a day against 12,082 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 337 of 337 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
52.2% of Placer County's bridges have passed the 50-year mark
176 of the 337 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 44.2% 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 19.8% of the county's Poor-condition bridge traffic
ROSEVILLE PARKWAY over ANTELOPE CREEK, built 2000, carries 44,970 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 14-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 227,371 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Placer County's bridges were built
337 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 14
1920–1929
14 bridges
- 1930s
1930–1939
25 bridges
- 1940s 15
1940–1949
15 bridges
- 1950s
1950–1959
51 bridges
- 1960s
1960–1969
39 bridges
- 1970s
1970–1979
44 bridges
- 1980s
1980–1989
36 bridges
- 1990s
1990–1999
24 bridges
- 2000s
2000–2009
38 bridges
- 2010s
2010–2019
41 bridges
- 2020s 9
2020–2029
9 bridges
What this shows Construction peaked in the 1950s, when 51 of the county's bridges still in the inventory were built, which is 15.1% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1976, 6 years newer than the California average of 1970.
How Placer County compares with California's closest counties by inventory size
The 5 California counties nearest Placer County in number of bridges, with their condition splits. Its 4.2% Poor share is the 1st-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1967 is 9 years newer.
Showing the 5 closest of 57 California counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Stanislaus County | 386 | 30.8% | 55.7% | 13.5% | 1956 |
| Monterey County | 377 | 56.8% | 35.5% | 7.7% | 1970 |
| Solano County | 373 | 44.8% | 47.5% | 7.8% | 1975 |
| San Mateo County | 361 | 26% | 64% | 10% | 1967 |
| Mendocino County | 357 | 34.7% | 57.7% | 7.6% | 1969 |
| Placer County (this page) | 337 | 44.2% | 51.6% | 4.2% | 1976 |
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 Placer 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 Placer County, both outside California so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CA (337 bridges here).
- Tama County, IA · 337 bridges
- Cowley County, KS · 337 bridges
- Ouachita County, LA · 337 bridges
- Windham County, VT · 337 bridges
Similar average build year
Nearest mean year-built outside CA (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (149)
WINDING ROAD
GoodOver: RUBICON RIVER
NO DATA ENTERED, Placer, CA
Built 1967 ADT: 50
FDR 44
GoodOver: DEEP CREEK
S30 T15N R13E, Placer, CA
Built 1954 ADT: 50
FDR 23
GoodOver: MIDDLE FK. AMERICAN RIV
S3 T13N R11E, Placer, CA
Built 1964 ADT: 50
NO DATA ENTERED
GoodOver: DUNCAN CREEK
NO DATA ENTERED, Placer, CA
Built 2007 ADT: 50
FDR 19
GoodOver: E.FK. OF N.FK. AMERICAN
S16 T16N R12E, Placer, CA
Built 1949 ADT: 50
NO DATA ENTERED
GoodOver: NF OF NF AMERICAN RIVER
NO DATA ENTERED, Placer, CA
Built 1994 ADT: 50
DALBY RD
GoodOver: YANKEE SLOUGH
JUST WEST OF DOWD RD, Placer, CA
Built 1925 Load: 0.0 t ADT: 1,605
NICOLAUS RD
GoodOver: E NICOLAUS DSTRBTN CANAL
1.5 MI WEST OF DOWD RD, Placer, CA
Built 1963 Load: 14.9 t ADT: 1,981
GLADDING RD
GoodOver: COON CREEK
SOUTH OF RIOSA RD, Placer, CA
Built 1928 Load: 14.9 t ADT: 560
MT VERNON RD
GoodOver: NORTH RAVINE
2.0 MI W OF AUBURN, Placer, CA
Built 1935 Load: 16.8 t ADT: 3,041
STATE ROUTE 49
GoodOver: NORTH FORK AMERICAN RIV
03-PLA-049-0.01, Placer, CA
Built 1948 Load: 17.5 t ADT: 9,000
FIDDYMENT RD
GoodOver: ORCHARD CREEK
0.5 MI N OF E CATLETT, Placer, CA
Built 1977 Load: 18.1 t ADT: 6,570
WISE RD
GoodOver: SOUTH SUTTER CANAL
2.0 MI W DOWD RD, Placer, CA
Built 1972 Load: 18.8 t ADT: 95
MOORE RD
GoodOver: SOUTH SUTTER CANAL
1.9 MI E BREWER RD, Placer, CA
Built 1972 Load: 18.8 t ADT: 721
DOWD ROAD
GoodOver: SOUTH SUTTER CANAL
1.4 MI E SUTTER CO LINE, Placer, CA
Built 1960 Load: 19.1 t ADT: 2,060
AUBURN FOLSOM RD
GoodOver: MINERS RAVINE
2.1 MI N DOUGLAS BLVD, Placer, CA
Built 1950 Load: 20.7 t ADT: 12,779
PACIFIC AVE
GoodOver: CLOSED ROADWAY
0.3 MI E/O SACRAMENTO ST., Placer, CA
Built 1970 Load: 20.7 t ADT: 1,663
INTERSTATE 80
GoodOver: LINDA CREEK
03-PLA-080-0.82-RSV, Placer, CA
Built 1955 Load: 21.1 t ADT: 165,000
PLACER HILL RD
GoodOver: WOOLEY CREEK
4.0 MI NORTH OF I-80, Placer, CA
Built 1935 Load: 21.7 t ADT: 2,164
FDR 08
GoodOver: POLE CREEK
NO DATA ENTERED, Placer, CA
Built 1969 Load: 22.0 t ADT: 50
DRY CREEK RD
GoodOver: SOUTH FORK DRY CREEK
2.0 MI E OF RTE 49, Placer, CA
Built 1966 Load: 22.7 t ADT: 3,401
MC COURTNEY ROAD
GoodOver: DOTY RAVINE
0.7 MI N OF WISE RD, Placer, CA
Built 1998 Load: 23.0 t ADT: 2,021
MC COURTNEY ROAD
GoodOver: COON CREEK
0.8 MI S. OF RIOSA ROAD, Placer, CA
Built 1998 Load: 23.3 t ADT: 1,861
SIERRA COLLEGE BLV
GoodOver: MINERS RAVINE
2.7 MI N OF CO LINE, Placer, CA
Built 1964 Load: 24.3 t ADT: 10,106
LINCOLN BLVD
GoodOver: YANKEE SLOUGH
0.53 MI S OF NADER LN, Placer, CA
Built 1950 Load: 24.3 t ADT: 16,800
STATE ROUTE 65
GoodOver: BEAR RIVER
03-PLA-065-R23.74, Placer, CA
Built 1965 Load: 25.3 t ADT: 16,800
WEIMAR CROSSROAD
GoodOver: INTERSTATE 80
03-PLA-080-29.32, Placer, CA
Built 1958 Load: 27.2 t ADT: 3,113
N65-BLUE OAKS OFF
GoodOver: S65-BLUE OAKS BLUE OAKS
03-PLA-065-M8.14, Placer, CA
Built 1987 Load: 27.9 t ADT: 3,260
LINCOLN BLVD
GoodOver: BIG YANKEE SLOUGH
0.56 MI NW OF NADER LN, Placer, CA
Built 1950 Load: 28.2 t ADT: 15,500
RIVERSIDE AVE
GoodOver: DRY CREEK
0.6 MI N CIRBY AVE, Placer, CA
Built 1928 Load: 28.8 t ADT: 18,000
BOWMAN ROAD
GoodOver: UP RR BNSF RY & AMTRAK
0.1 MI S. OLD AIRPORT RD., Placer, CA
Built 1949 Load: 30.1 t ADT: 6,032
BOWMAN ROAD
GoodOver: UP RR BNSF RY & AMTRAK
0.1 MI SOUTH OF 19C-62, Placer, CA
Built 1949 Load: 31.1 t ADT: 6,032
INTERSTATE 80
GoodOver: MINERS RAVINE
03-PLA-080-2.88-RSV, Placer, CA
Built 1954 Load: 31.4 t ADT: 155,000
CROTHER RD
GoodOver: UP RR BNSF RY & AMTRAK
NEAR BURGAN RD, Placer, CA
Built 1973 Load: 31.8 t ADT: 700
MAGRA ROAD
GoodOver: INTERSTATE ROUTE 80
03-PLA-080-37.78, Placer, CA
Built 1958 Load: 32.1 t ADT: 563
STATE ROUTE 49
GoodOver: WISE CANAL
03-PLA-049-5.02, Placer, CA
Built 1973 Load: 32.4 t ADT: 33,500
DOUGLAS-SUNRISE BL
GoodOver: INTERSTATE 80
03-PLA-080-1.95-RSV, Placer, CA
Built 2006 Load: 32.4 t ADT: 10,000
STATE ROUTE 49
GoodOver: ROCK CREEK
03-PLA-049-6.93, Placer, CA
Built 1979 Load: 32.4 t ADT: 28,000
STATE ROUTE 49
GoodOver: SOUTH FORK DRY CREEK
03-PLA-049-R8.09, Placer, CA
Built 1993 Load: 32.4 t ADT: 28,000
STATE ROUTE 49
GoodOver: NORTH FORK DRY CREEK
03-PLA-049-R9.45, Placer, CA
Built 1993 Load: 32.4 t ADT: 28,000
STATE ROUTE 89
GoodOver: TRUCKEE RIVER
03-PLA-089-13.06, Placer, CA
Built 1990 Load: 32.4 t ADT: 12,000
RAMP/CONNECTOR 80
GoodOver: MINERS RAVINE
03-PLA-080-2.91-RSV, Placer, CA
Built 1989 Load: 32.4 t ADT: 5,000
MAPLE STREET
GoodOver: INTERSTATE 80
03-PLA-080-17.29-AUB, Placer, CA
Built 1989 Load: 32.4 t ADT: 5,000
INTERSTATE 80 EB
GoodOver: NYACK ROAD
03-PLA-080-54.81, Placer, CA
Built 2009 Load: 32.4 t ADT: 13,250
STATE ROUTE 65
GoodOver: LITTLE PLEASANT GROVE CR
03-PLA-065-M8.59, Placer, CA
Built 1971 Load: 32.4 t ADT: 70,000
STATE ROUTE 65
GoodOver: ORCHARD CREEK
03-PLA-065-R11.66, Placer, CA
Built 1971 Load: 32.4 t ADT: 59,000
STATE ROUTE 65 SB
GoodOver: UP BNSF AMTRAK TAYLOR CR
03-PLA-065-R5.06-RSV, Placer, CA
Built 1987 Load: 32.4 t ADT: 50,000
N65-BLUE OAKS OFF
GoodOver: STATE ROUTE 65
03-PLA-065-M8.15, Placer, CA
Built 1987 Load: 32.4 t ADT: 3,240
STATE ROUTE 49
GoodOver: AUBURN RAVINE
03-PLA-049-3.33-AUB, Placer, CA
Built 1989 Load: 32.4 t ADT: 33,500
W80-E&W49-W80 RMPS
GoodOver: AUBURN RAVINE
03-PLA-049-3.25-AUB, Placer, CA
Built 1989 Load: 32.4 t ADT: 13,300
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.