Total bridges
37
Public highway bridges in Sitka City and County
County profile · official public datasets
Sitka City and County, AK
37 public highway bridges tracked in the FHWA National Bridge Inventory: 45.9% rated Good, 51.4% Fair, 2.7% Poor.
- 37
- Public bridges
- 45.9%
- Good condition
- 2.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Sitka City and County posts a top-quartile lowest Poor-condition share among rated counties in the state across rated county bridge inventory.
- Top 19%
- lowest Poor share in state
- 2.7%
- Poor-condition share
- 37
- public highway bridges
- 1989
- 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.
Sitka City and County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Sitka City and County ranks #5 of 27 Alaska counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.7%). Sitka City and County, Alaska contains 37 public highway bridges. Roughly 45.9% are rated “Good,” 51.4% “Fair,” and 2.7% “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
45.9%
17 of 37 rated 7-9
Fair condition
51.4%
19 of 37 rated 5-6
Poor condition
2.7%
1 of 37 rated 4 or below
In-state Poor-share rank
#5 of 27
Among Alaska counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 37 NBI-tracked bridges by lowest applicable component rating.
Good 45.9% (17)
Fair 51.4% (19)
Poor 2.7% (1)
10.8% of Sitka City and County's bridges have passed the 50-year mark
4 of the 37 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 45.9% 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.
When Sitka City and County's bridges were built
37 bridges with a recorded construction year, grouped by decade
- 1930s 1
1930–1939
1 bridges
- 1960s 1
1960–1969
1 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s
1980–1989
12 bridges
- 1990s
1990–1999
9 bridges
- 2000s
2000–2009
7 bridges
- 2010s 3
2010–2019
3 bridges
What this shows Construction peaked in the 1980s, when 12 of the county's bridges still in the inventory were built, which is 32.4% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1989) matches the Alaska average (1989).
How Sitka City and County compares with Alaska's closest counties by inventory size
The 5 Alaska counties nearest Sitka City and County in number of bridges, with their condition splits. Its 2.7% Poor share is the 2nd-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1979 is 10 years newer.
Showing the 5 closest of 26 Alaska counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Copper River County | 52 | 46.2% | 48.1% | 5.8% | 1984 |
| Juneau City and County | 47 | 36.2% | 61.7% | 2.1% | 1978 |
| Sitka City and County (this page) | 37 | 45.9% | 51.4% | 2.7% | 1989 |
| Nome County | 30 | 30% | 63.3% | 6.7% | 1977 |
| Denali County | 27 | 18.5% | 77.8% | 3.7% | 1976 |
| Kodiak Island County | 25 | 32% | 60% | 8% | 1981 |
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 Sitka City and 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 Sitka City and County, both outside Alaska so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside AK (37 bridges here).
- Suwannee County, FL · 37 bridges
- Teton County, ID · 37 bridges
- Dickinson County, MI · 37 bridges
- Emmet County, MI · 37 bridges
Similar average build year
Nearest mean year-built outside AK (1989 here).
- Harris County, TX · avg 1989 · 4,029 bridges
- Mecklenburg County, NC · avg 1989 · 746 bridges
- Buffalo County, NE · avg 1989 · 459 bridges
- Brazos County, TX · avg 1989 · 370 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (19)
LOGGING ROAD
FairOver: CREEK
CORNER BAY, Sitka City and, AK
Built 1985 Load: 16.2 t
LOGGING ROAD
FairOver: KOOK CREEK
CORNER BAY, Sitka City and, AK
Built 1988 Load: 16.2 t
LOGGING ROAD
FairOver: STREAM - 1991
CORNER BAY, Sitka City and, AK
Built 1991 Load: 16.2 t
LOGGING ROAD
FairOver: STREAM 1991
CORNER BAY, Sitka City and, AK
Built 1991 Load: 19.8 t
SAWMILL CR ROAD
FairOver: SAWMILL CREEK
MILE POINT 5.6, Sitka City and, AK
Built 1962 Load: 29.0 t ADT: 117
MARINE HWY ROUTE
FairOver: SITKA FERRY TERMINAL
SITKA, Sitka City and, AK
Built 1988 Load: 29.8 t ADT: 45
HARBOR DRIVE
FairOver: SITKA HARBOR
MILE POINT 0.5, Sitka City and, AK
Built 1971 Load: 31.5 t ADT: 3,600
LOGGING ROAD
FairOver: N FORK WHITE ROCK CREEK
FALSE ISLAND, Sitka City and, AK
Built 1975 Load: 32.7 t
LOGGING ROAD
FairOver: CAMP WATER CREEK
FALSE ISLAND, Sitka City and, AK
Built 1992 Load: 32.7 t
NO DATA ENTERED
FairOver: NO DATA ENTERED
FALSE ISLAND, Sitka City and, AK
Built 1990 Load: 32.7 t
NO DATA ENTERED
FairOver: NO DATA ENTERED
FALSE ISLAND, Sitka City and, AK
Built 1995 Load: 32.7 t
NO DATA ENTERED
FairOver: NO DATA ENTERED
FALSE ISLAND, Sitka City and, AK
Built 1996 Load: 32.7 t
HALIBUT POINT ROAD
FairOver: STARRIGAVAN CREEK
MILE POINT 7.1, Sitka City and, AK
Built 1983 Load: 34.3 t ADT: 560
LOGGING ROAD
FairOver: CREEK
FALSE ISLAND, Sitka City and, AK
Built 1983 Load: 38.2 t
LOGGING ROAD
FairOver: FALSE CREEK
FALSE ISLAND, Sitka City and, AK
Built 1982 Load: 49.9 t
HALIBUT POINT ROAD
FairOver: GRANITE CREEK
MILE POINT 4.3, Sitka City and, AK
Built 2014 Load: 52.5 t ADT: 2,700
HALIBUT POINT ROAD
FairOver: NO NAME CREEK
MILE POINT 6.6, Sitka City and, AK
Built 2014 Load: 53.0 t ADT: 1,360
LOGGING ROAD
FairOver: BEAVER POND OUTLET
CORNER BAY, Sitka City and, AK
Built 2004 Load: 64.5 t
HALIBUT POINT ROAD
FairOver: CASCADE CREEK
MILE POINT 2.0, Sitka City and, AK
Built 1937 Load: 65.3 t ADT: 4,790
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.