Total bridges
377
Public highway bridges in Monterey County
County profile · official public datasets
Monterey County, CA
377 public highway bridges tracked in the FHWA National Bridge Inventory: 56.8% rated Good, 35.5% Fair, 7.7% Poor.
- 377
- Public bridges
- 56.8%
- Good condition
- 7.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Monterey County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 35th
- of 58 on Poor share
- 7.7%
- Poor-condition share
- 377
- public highway bridges
- 1970
- 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.
Monterey County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Monterey County ranks #35 of 58 California counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.7%). Monterey County, California contains 377 public highway bridges. Roughly 56.8% are rated “Good,” 35.5% “Fair,” and 7.7% “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
56.8%
214 of 377 rated 7-9
Fair condition
35.5%
134 of 377 rated 5-6
Poor condition
7.7%
29 of 377 rated 4 or below
In-state Poor-share rank
#35 of 58
Among California counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 377 NBI-tracked bridges by lowest applicable component rating.
Good 56.8% (214)
Fair 35.5% (134)
Poor 7.7% (29)
Monterey County's Poor-condition bridges carry 93,587 vehicle crossings a day
That is 2.7% of the county's reported daily bridge traffic on 7.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,227 crossings a day against 11,871 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 377 of 377 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
68.4% of Monterey County's bridges have passed the 50-year mark
258 of the 377 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 56.8% 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 30.3% of the county's Poor-condition bridge traffic
SANBORN RD over UP RR & AMTRAK, built 1948, carries 28,392 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 29-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 93,587 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Monterey County's bridges were built
377 bridges with a recorded construction year, grouped by decade
- 1910s 4
1910–1919
4 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s 18
1930–1939
18 bridges
- 1940s 29
1940–1949
29 bridges
- 1950s 48
1950–1959
48 bridges
- 1960s
1960–1969
127 bridges
- 1970s
1970–1979
56 bridges
- 1980s 27
1980–1989
27 bridges
- 1990s 22
1990–1999
22 bridges
- 2000s 21
2000–2009
21 bridges
- 2010s 23
2010–2019
23 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1960s, when 127 of the county's bridges still in the inventory were built, which is 33.7% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1970) matches the California average (1970).
How Monterey County compares with California's closest counties by inventory size
The 5 California counties nearest Monterey County in number of bridges, with their condition splits. Its 7.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1967 is in line with the group.
Showing the 5 closest of 57 California counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Humboldt County | 396 | 38.9% | 54.3% | 6.8% | 1968 |
| Stanislaus County | 386 | 30.8% | 55.7% | 13.5% | 1956 |
| Monterey County (this page) | 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 |
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 Monterey 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 Monterey County, both outside California so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CA (377 bridges here).
- Ogle County, IL · 377 bridges
- Cass County, MO · 377 bridges
- Butler County, OH · 377 bridges
- Butler County, PA · 378 bridges
Similar average build year
Nearest mean year-built outside CA (1970 here).
- Hamilton County, OH · avg 1970 · 783 bridges
- Yavapai County, AZ · avg 1970 · 543 bridges
- Garfield County, OK · avg 1970 · 504 bridges
- Somerset County, NJ · avg 1970 · 397 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (214)
US HIGHWAY 101 NB
GoodOver: ST RTE 198 (@PM R0.11)
05-MON-101-R32.00, Monterey, CA
Built 1971 Load: 34.3 t ADT: 7,450
STATE ROUTE 1 NB
GoodOver: LAKE DRIVE
05-MON-001-R85.51, Monterey, CA
Built 1976 Load: 34.3 t ADT: 23,000
HARO ST
GoodOver: TEMBLADERO SLOUGH
0.2 MI S SR 183, Monterey, CA
Built 1966 Load: 34.3 t ADT: 200
STATE ROUTE 68 EB
GoodOver: SPRECKELS ROAD
05-MON-068-R18.08, Monterey, CA
Built 1967 Load: 34.7 t ADT: 15,050
STATE ROUTE 1
GoodOver: BIG CREEK
05-MON-001-28.09, Monterey, CA
Built 1938 Load: 35.0 t ADT: 2,000
OAK AVENUE
GoodOver: US HIGHWAY 101
05-MON-101-53.36-GNFD, Monterey, CA
Built 1961 Load: 35.0 t ADT: 6,220
BRADLEY ROAD
GoodOver: US HIGHWAY 101
05-MON-101-R2.15, Monterey, CA
Built 1965 Load: 35.0 t ADT: 100
STATE ROUTE 1 NB
GoodOver: RESERVATION RD
05-MON-001-R86.48, Monterey, CA
Built 1976 Load: 35.0 t ADT: 23,000
STATE ROUTE 1
GoodOver: TEMBLADERO SLOUGH
05-MON-001-T91.99, Monterey, CA
Built 1976 Load: 35.0 t ADT: 23,350
CARMEL VALLEY RD
GoodOver: FINCH CREEK
12.3 MI N/W ARROYO SECO R, Monterey, CA
Built 1963 Load: 35.0 t ADT: 290
WALNUT AVE
GoodOver: US HIGHWAY 101
05-MON-101-53.86, Monterey, CA
Built 1961 Load: 35.3 t ADT: 2,300
SAN BENANCIO RD
GoodOver: TORO CREEK
0.05 MI S SR 68, Monterey, CA
Built 1971 Load: 35.3 t ADT: 5,000
US HIGHWAY 101 SB
GoodOver: NACIMIENTO RIVER
05-MON-101-R2.43, Monterey, CA
Built 1965 Load: 35.6 t ADT: 8,100
STATE ROUTE 1 SB
GoodOver: RESERVATION RD
05-MON-001-R86.48, Monterey, CA
Built 1976 Load: 35.6 t ADT: 23,000
STATE ROUTE 1 SB
GoodOver: DEL MONTE AVE
05-MON-001-R78.89-MON, Monterey, CA
Built 1968 Load: 36.6 t ADT: 29,500
US HIGHWAY 101 SB
GoodOver: EAST MARKET STREET
05-MON-101-87.30-SAL, Monterey, CA
Built 1954 Load: 36.9 t ADT: 36,900
SR 68 (JOHN ST)
GoodOver: US HWY 101
05-MON-068-22.00-SAL, Monterey, CA
Built 1954 Load: 36.9 t ADT: 20,500
STATE ROUTE 1
GoodOver: TORRE CANYON
05-MON-001-39.72, Monterey, CA
Built 1955 Load: 37.3 t ADT: 3,150
STATE ROUTE 1 SB
GoodOver: FREMONT ST-N1 & AGUAJITO
05-MON-001-R77.37-MON, Monterey, CA
Built 1968 Load: 37.3 t ADT: 28,000
SCENIC DRIVE OC
GoodOver: STATE ROUTE 68
05-MON-068-3.07, Monterey, CA
Built 1930 Load: 37.6 t ADT: 561
N MAIN ST-S101 ON
GoodOver: US 101 SR183 MAIN-N101
05-MON-101-R88.28-SAL, Monterey, CA
Built 1965 Load: 37.6 t ADT: 8,300
US HIGHWAY 101 SB
GoodOver: JOLON RD (CO RD G14)
05-MON-101-R41.95L, Monterey, CA
Built 1968 Load: 37.6 t ADT: 12,600
US HIGHWAY 101 SB
GoodOver: LOCKWOOD SAN LUCAS ROAD
05-MON-101-R30.65, Monterey, CA
Built 1971 Load: 37.6 t ADT: 7,450
STATE ROUTE 1
GoodOver: HILLSIDE ABOVE OCEAN
05-MON-001-35.90, Monterey, CA
Built 1981 Load: 37.6 t ADT: 5,000
NO DATA ENTERED
GoodOver: NACIMIENTO RIVER
NO DATA ENTERED, Monterey, CA
Built 1965 Load: 37.6 t ADT: 50
STATE ROUTE 1 SB
GoodOver: STATE ROUTE 218
05-MON-001-R79.33-SEA, Monterey, CA
Built 1968 Load: 37.9 t ADT: 29,500
STATE ROUTE 1 NB
GoodOver: STATE ROUTE 218
05-MON-001-R79.33-SEA, Monterey, CA
Built 1968 Load: 37.9 t ADT: 29,500
MOLERA RD
GoodOver: TEMBLADERO SLOUGH
0.8 MI S SR1, Monterey, CA
Built 1959 Load: 37.9 t ADT: 1,700
ROBINSON CANYON RD
GoodOver: POTRERO CREEK
0.5 MI S OF G16, Monterey, CA
Built 1971 Load: 38.2 t ADT: 3,600
MOLERA RD
GoodOver: SR 1 S1-MOLERA OFFRAMP
05-MON-001-R90.39, Monterey, CA
Built 1976 Load: 38.6 t ADT: 2,400
STATE ROUTE 1 NB
GoodOver: PEDESTRIAN WALKWAY
05-MON-001-R83.47, Monterey, CA
Built 1973 Load: 39.2 t ADT: 29,500
US HIGHWAY 101 SB
GoodOver: N101-ABBOTT&ABBOTT-S101
05-MON-101-82.47, Monterey, CA
Built 1954 Load: 40.2 t ADT: 41,000
STATE ROUTE 1 SB
GoodOver: N1-MUNRAS AVE OFF RAMP
05-MON-001-R75.74-MON, Monterey, CA
Built 1968 Load: 40.2 t ADT: 28,000
STATE ROUTE 1 NB
GoodOver: N1-MUNRAS AVE OFF RAMP
05-MON-001-R75.74-MON, Monterey, CA
Built 1968 Load: 40.2 t ADT: 28,000
PEACH TREE ROAD
GoodOver: SAN LORENZO CREEK
5.5 MI W SLACK CANYON RD, Monterey, CA
Built 1966 Load: 40.2 t ADT: 20
STATE ROUTE 156 WB
GoodOver: TEMBLADERO SLOUGH
05-MON-156-R0.90, Monterey, CA
Built 1966 Load: 40.5 t ADT: 14,925
STATE ROUTE 156 EB
GoodOver: TEMBLADERO SLOUGH
05-MON-156-R0.90, Monterey, CA
Built 1966 Load: 40.5 t ADT: 14,925
NORTH MAIN
GoodOver: LITTLE BEAR CREEK
0.2 MI N BORONDA RD, Monterey, CA
Built 1962 Load: 40.5 t ADT: 10,000
PARIS VALLEY RD
GoodOver: U.S. HIGHWAY 101
05-MON-101-R28.14, Monterey, CA
Built 1971 Load: 40.8 t ADT: 1,000
ARROYO SECO RD
GoodOver: US HIGHWAY 101
05-MON-101-60.40, Monterey, CA
Built 1958 Load: 41.1 t ADT: 2,750
US 101 SB S101 OFF
GoodOver: LITTLE BEAR CREEK
05-MON-101-R91.27, Monterey, CA
Built 1965 Load: 41.1 t ADT: 49,000
US HIGHWAY 101 NB
GoodOver: LITTLE BEAR CREEK
05-MON-101-R91.29, Monterey, CA
Built 1965 Load: 41.1 t ADT: 49,000
US HIGHWAY 101 NB
GoodOver: EAST MARKET STREET
05-MON-101-87.30-SAL, Monterey, CA
Built 1954 Load: 41.5 t ADT: 36,900
STATE ROUTE 1 SB
GoodOver: PEDESTRIAN WALKWAY
05-MON-001-R83.47, Monterey, CA
Built 1973 Load: 41.5 t ADT: 29,500
SCENIC DRIVE
GoodOver: STATE ROUTE 68
05-MON-068-L4.02, Monterey, CA
Built 1930 Load: 41.8 t ADT: 561
S GREENFIELD
GoodOver: US HIGHWAY 101
05-MON-101-52.66, Monterey, CA
Built 1961 Load: 43.1 t ADT: 9,300
DEL MONTE BLVD
GoodOver: STATE ROUTE 1
05-MON-001-R88.64, Monterey, CA
Built 1976 Load: 43.4 t ADT: 4,900
ARROYO SECO RD
GoodOver: PINEY CREEK
0.2 MI W CARMEL VALLEY R, Monterey, CA
Built 2000 Load: 43.4 t ADT: 390
EL CAMINO REAL
GoodOver: US HIGHWAY 101
05-MON-101-54.79, Monterey, CA
Built 1961 Load: 43.7 t ADT: 2,833
TIOGA AVE
GoodOver: STATE ROUTE 1
05-MON-001-R80.09-SNDC, Monterey, CA
Built 1968 Load: 45.0 t ADT: 1,200
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.