Total bridges
121
Public highway bridges in Sutter County
County profile · official public datasets
Sutter County, CA
121 public highway bridges tracked in the FHWA National Bridge Inventory: 33.9% rated Good, 52.9% Fair, 13.2% Poor.
- 121
- Public bridges
- 33.9%
- Good condition
- 13.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Sutter County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 53rd
- of 58 on Poor share
- 13.2%
- Poor-condition share
- 121
- public highway bridges
- 1968
- 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.
Sutter County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Sutter County ranks #53 of 58 California counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 13.2%). Sutter County, California contains 121 public highway bridges. Roughly 33.9% are rated “Good,” 52.9% “Fair,” and 13.2% “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
33.9%
41 of 121 rated 7-9
Fair condition
52.9%
64 of 121 rated 5-6
Poor condition
13.2%
16 of 121 rated 4 or below
In-state Poor-share rank
#53 of 58
Among California counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 121 NBI-tracked bridges by lowest applicable component rating.
Good 33.9% (41)
Fair 52.9% (64)
Poor 13.2% (16)
Sutter County's Poor-condition bridges carry 13,387 vehicle crossings a day
That is 2.2% of the county's reported daily bridge traffic on 13.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 837 crossings a day against 9,659 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 121 of 121 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
54.5% of Sutter County's bridges have passed the 50-year mark
66 of the 121 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 33.9% 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 56.8% of the county's Poor-condition bridge traffic
STATE ROUTE 20 over SUTTER BYPASS, built 1938, carries 7,600 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 16-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 13,387 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Sutter County's bridges were built
121 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s
1920–1929
12 bridges
- 1930s
1930–1939
20 bridges
- 1940s
1940–1949
8 bridges
- 1950s
1950–1959
10 bridges
- 1960s
1960–1969
9 bridges
- 1970s
1970–1979
15 bridges
- 1980s 7
1980–1989
7 bridges
- 1990s
1990–1999
17 bridges
- 2000s 7
2000–2009
7 bridges
- 2010s
2010–2019
13 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1930s, when 20 of the county's bridges still in the inventory were built, which is 16.5% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1968) matches the California average (1970).
How Sutter County compares with California's closest counties by inventory size
The 5 California counties nearest Sutter County in number of bridges, with their condition splits. Its 13.2% Poor share is the 6th-lowest of these 6. Its average build year of 1968 against a peer-group mean of 1965 is in line with the group.
Showing the 5 closest of 57 California counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Lake County | 129 | 30.2% | 62% | 7.8% | 1970 |
| Yuba County | 127 | 37.8% | 55.9% | 6.3% | 1967 |
| Tuolumne County | 125 | 36% | 56.8% | 7.2% | 1964 |
| Sutter County (this page) | 121 | 33.9% | 52.9% | 13.2% | 1968 |
| Mariposa County | 109 | 21.1% | 67.9% | 11% | 1956 |
| Lassen County | 108 | 25.9% | 65.7% | 8.3% | 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 Sutter 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 Sutter County, both outside California so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CA (121 bridges here).
- Gadsden County, FL · 121 bridges
- Emanuel County, GA · 121 bridges
- Union County, LA · 121 bridges
- Montcalm County, MI · 121 bridges
Similar average build year
Nearest mean year-built outside CA (1968 here).
- Montgomery County, PA · avg 1968 · 828 bridges
- Providence County, RI · avg 1968 · 476 bridges
- Delaware County, PA · avg 1968 · 387 bridges
- Genesee County, MI · avg 1968 · 371 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (16)
TISDALE RD
PoorOver: WESTSIDE CANAL
100 E CRANMORE RD, Sutter, CA
Built 1925 Load: 5.2 t ADT: 12
CRANMORE RD
PoorOver: WESTSIDE CANAL
0.3 MI N FASIG RD, Sutter, CA
Built 1925 Load: 13.6 t ADT: 61
WEST BUTTE RD
PoorOver: CHEROKEE DRAIN
AT NORTH BUTTE RD, Sutter, CA
Built 1920 Load: 14.3 t ADT: 97
NUESTRO RD
PoorOver: SNAKE RIVER
0.7 MI E OF E BUTTE RD, Sutter, CA
Built 1925 Load: 15.6 t ADT: 325
LARKIN RD
PoorOver: S BRNCH SUTTER-BUTTE CNL
0.2 MI N OF ENCINAL RD, Sutter, CA
Built 1925 Load: 16.2 t ADT: 1,159
SANDERS RD
PoorOver: SUTTER CO EXTENSION CNL
1.2 MI W OF BROADWAY, Sutter, CA
Built 1940 Load: 16.2 t ADT: 177
NUESTRO ROAD
PoorOver: SUTTER CO EXTENSION CNL
0.8 MI E OF E BUTTE RD, Sutter, CA
Built 1940 Load: 16.2 t ADT: 325
KENT ROAD
PoorOver: SUTTER-BUTTE CANAL
0.2 MI S OF MCDONALD AVE, Sutter, CA
Built 1938 Load: 17.8 t ADT: 389
ARCHER ROAD
PoorOver: SUTTER-BUTTE CANAL
0.3 MI E OF KENT ROAD, Sutter, CA
Built 1950 Load: 21.4 t ADT: 43
STATE ROUTE 20
PoorOver: SUTTER BYPASS
03-SUT-020-4.22, Sutter, CA
Built 1938 Load: 21.7 t ADT: 7,600
SACRAMENTO AVE
PoorOver: SUTTER BYPASS E CHANNEL
1.1 MI WEST OF SR 99, Sutter, CA
Built 1975 Load: 22.4 t ADT: 334
CLARK RD
PoorOver: SUTTER-BUTTE CNL S BRNCH
0.1 MI W OF MADDEN RD, Sutter, CA
Built 1950 Load: 24.3 t ADT: 690
RECLAMATION RD
PoorOver: TISDALE RD TISDALE BYPS
3 MI S/O OSWALD RD, Sutter, CA
Built 1964 Load: 26.9 t ADT: 737
PLEASANT GROVE RD
PoorOver: SCIATA CREEK
.8 MI N OF RIEGO RD, Sutter, CA
Built 1988 Load: 32.4 t ADT: 1,190
COOLEY ROAD
PoorOver: SUTTER-BUTTE CANAL
0.6 MI E OF METTER RD, Sutter, CA
Built 1910 Load: 32.4 t ADT: 193
ARMOUR ROAD
PoorOver: PHEASANT CANAL
0.5 MI N/O VARNEY RD, Sutter, CA
Built 1950 Load: 35.3 t ADT: 55
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.