Total bridges
120
Public highway bridges in Skamania County
County profile · official public datasets
Skamania County, WA
120 public highway bridges tracked in the FHWA National Bridge Inventory: 45.8% rated Good, 45% Fair, 9.2% Poor.
- 120
- Public bridges
- 45.8%
- Good condition
- 9.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Skamania County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 31st
- of 39 on Poor share
- 9.2%
- Poor-condition share
- 120
- public highway bridges
- 1974
- 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.
Skamania County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Skamania County ranks #31 of 39 Washington counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.2%). Skamania County, Washington contains 120 public highway bridges. Roughly 45.8% are rated “Good,” 45% “Fair,” and 9.2% “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
45.8%
55 of 120 rated 7-9
Fair condition
45%
54 of 120 rated 5-6
Poor condition
9.2%
11 of 120 rated 4 or below
In-state Poor-share rank
#31 of 39
Among Washington counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 120 NBI-tracked bridges by lowest applicable component rating.
Good 45.8% (55)
Fair 45% (54)
Poor 9.2% (11)
Skamania County's Poor-condition bridges carry 10,539 vehicle crossings a day
That is 13.3% of the county's reported daily bridge traffic on 9.2% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 958 crossings a day against 434 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 120 of 120 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
50.8% of Skamania County's bridges have passed the 50-year mark
61 of the 120 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 45.8% 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 45.9% of the county's Poor-condition bridge traffic
SR 14 over HALF BRIDGE, built 1930, carries 4,835 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 11-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 10,539 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Skamania County's bridges were built
120 bridges with a recorded construction year, grouped by decade
- 1920s 5
1920–1929
5 bridges
- 1930s 6
1930–1939
6 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s
1950–1959
20 bridges
- 1960s
1960–1969
21 bridges
- 1970s
1970–1979
18 bridges
- 1980s
1980–1989
21 bridges
- 1990s
1990–1999
9 bridges
- 2000s
2000–2009
12 bridges
- 2010s 7
2010–2019
7 bridges
What this shows Construction peaked in the 1960s, when 21 of the county's bridges still in the inventory were built, which is 17.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1974) matches the Washington average (1975).
How Skamania County compares with Washington's closest counties by inventory size
The 5 Washington counties nearest Skamania County in number of bridges, with their condition splits. Its 9.2% Poor share is the 6th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1978 is in line with the group.
Showing the 5 closest of 38 Washington counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Franklin County | 134 | 56% | 39.6% | 4.5% | 1970 |
| Mason County | 133 | 53.4% | 42.1% | 4.5% | 1975 |
| Pacific County | 120 | 56.7% | 37.5% | 5.8% | 1974 |
| Skamania County (this page) | 120 | 45.8% | 45% | 9.2% | 1974 |
| Kitsap County | 115 | 71.3% | 27.8% | 0.9% | 1989 |
| Jefferson County | 99 | 57.6% | 38.4% | 4% | 1982 |
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 Skamania 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 Skamania County, both outside Washington so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WA (120 bridges here).
- Matanuska-Susitna County, AK · 120 bridges
- Indian River County, FL · 120 bridges
- Perry County, MO · 120 bridges
- Schuyler County, MO · 120 bridges
Similar average build year
Nearest mean year-built outside WA (1974 here).
- Knox County, TN · avg 1974 · 588 bridges
- Summit County, OH · avg 1974 · 563 bridges
- Onondaga County, NY · avg 1974 · 472 bridges
- Orange County, NY · avg 1974 · 472 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (54)
COOK-UNDERWOOD RD
FairOver: LITTLE WHITE SALMON RIVE
5.60 NE JCT SR 14, Skamania, WA
Built 1957 Load: 8.1 t ADT: 476
CASCADE DRIVE
FairOver: MOFFETT CREEK
00.1 S BPA LINES, Skamania, WA
Built 1970 Load: 10.7 t ADT: 83
EVERGREEN DRIVE
FairOver: HAMILTON CR-GREENLEAF SL
00.1 UPSTREAM SR 14, Skamania, WA
Built 1924 Load: 10.7 t ADT: 299
SR 14
FairOver: BN RR
18.7 E CLARK CO, Skamania, WA
Built 1978 Load: 12.0 t ADT: 4,851
SR 14
FairOver: ROCK CR
22.1 E CLARK CO, Skamania, WA
Built 1938 Load: 12.0 t ADT: 6,378
NO DATA ENTERED
FairOver: LEWIS RIVER
2 MILES NORTH OF JCT. RD, Skamania, WA
Built 1980 Load: 14.3 t ADT: 179
BUCK CREEK ROAD
FairOver: BIG BUCK CREEK
0.18 NE JCT NESTER PEAK R, Skamania, WA
Built 1979 Load: 15.9 t ADT: 38
SR 14
FairOver: CASCADE DRIVE
16.1 E CLARK CO, Skamania, WA
Built 1978 Load: 16.8 t ADT: 4,851
ROCK CREEK DRIVE
FairOver: ROCK CREEK
BY COUNTY SHOPS, Skamania, WA
Built 1921 Load: 17.2 t ADT: 1,670
WASHOUGAL RIVER RD
FairOver: WASHOUGAL RIVER
3.81 N OF SALMON FALLS RD, Skamania, WA
Built 1955 Load: 18.1 t ADT: 731
NO DATA ENTERED
FairOver: CANYON CREEK
ABOUT 100 EAST OF RD 37, Skamania, WA
Built 1963 Load: 18.2 t ADT: 207
NO DATA ENTERED
FairOver: COPPER CREEK
7.5 MILES EAST OF JCT. NE, Skamania, WA
Built 1996 Load: 20.1 t ADT: 99
WIND RIVER ROAD
FairOver: WIND RIVER
3.45 NW JCT SR14, Skamania, WA
Built 1960 Load: 20.4 t ADT: 1,548
SR 14
FairOver: DUNCAN CR
11.1 E CLARK CO, Skamania, WA
Built 1926 Load: 20.9 t ADT: 4,632
NO DATA ENTERED
FairOver: EAST FORK CANYON CREEK
24 MILES SOUTH-EAST OF JC, Skamania, WA
Built 1952 Load: 20.9 t ADT: 179
NO DATA ENTERED
FairOver: CISPUS RIVER
20 MILES SOUTH-EAST OF JC, Skamania, WA
Built 1951 Load: 22.7 t ADT: 300
NO DATA ENTERED
FairOver: CANYON CREEK
2 MILES EAST OF FOREST BO, Skamania, WA
Built 1951 Load: 23.6 t ADT: 207
SR 14
FairOver: WOODARD CREEK
12.5 E CLARK CO, Skamania, WA
Built 1928 Load: 24.0 t ADT: 4,428
NO DATA ENTERED
FairOver: LEWIS RIVER
0.7 MILE WEST OF JCT. RD, Skamania, WA
Built 1976 Load: 24.5 t ADT: 80
NO DATA ENTERED
FairOver: TILLICUM CREEK
ABOUT 22 MILES EAST OF JC, Skamania, WA
Built 1964 Load: 24.5 t ADT: 12
CANYON CREEK RD
FairOver: WASHOUGAL RIVER
1.1 E CLARK CO, Skamania, WA
Built 1982 Load: 24.9 t ADT: 1,249
NO DATA ENTERED
FairOver: GREEN FORK CREEK
15.7 MILES WEST OF THE WI, Skamania, WA
Built 1958 Load: 25.4 t ADT: 30
NO DATA ENTERED
FairOver: CANYON CREEK
5.8 MILES NW OF HWY 12 (M, Skamania, WA
Built 1957 Load: 25.4 t ADT: 129
SR 14
FairOver: SP S RY
37.8 E CLARK CO, Skamania, WA
Built 1936 Load: 26.3 t ADT: 3,587
NO DATA ENTERED
FairOver: BIG CREEK
8.9 MILES EAST OF JCT. FS, Skamania, WA
Built 1966 Load: 26.3 t ADT: 99
NO DATA ENTERED
FairOver: CASCADE CREEK
1.4 MILE NORTH OF TROUT L, Skamania, WA
Built 1956 Load: 26.3 t ADT: 50
NO DATA ENTERED
FairOver: WHITE SALMON RIVER
1.4 MILE NORTH OF TROUT L, Skamania, WA
Built 1957 Load: 26.3 t ADT: 25
NO DATA ENTERED
FairOver: LEWIS RIVER
EAST FROM COUGAR WA ON, Skamania, WA
Built 1964 Load: 28.1 t ADT: 37
NO DATA ENTERED
FairOver: LITTLE CREEK
11 1/2 MILES EAST OF JCT, Skamania, WA
Built 1956 Load: 30.0 t ADT: 80
SR 14
FairOver: CAPE HORN SLIDE
3.3 E CLARK CO, Skamania, WA
Built 1930 Load: 30.1 t ADT: 4,835
NO DATA ENTERED
FairOver: BOULDER CREEK
28 1/2 MILES EAST OF JCT, Skamania, WA
Built 1971 Load: 31.8 t ADT: 99
NO DATA ENTERED
FairOver: CAT CREEK
T10N R9E SEC12 NE 1/4, Skamania, WA
Built 2000 Load: 32.7 t ADT: 50
NO DATA ENTERED
FairOver: POWER CANAL
33 MILES EAST OF JCT INTE, Skamania, WA
Built 1957 Load: 33.6 t ADT: 650
NO DATA ENTERED
FairOver: CURLY CREEK
4.3 MILES SOUTHEAST OF JU, Skamania, WA
Built 1965 Load: 33.6 t ADT: 240
NO DATA ENTERED
FairOver: LEWIS RIVER
GO EAST FROM COUGAR WA, Skamania, WA
Built 1972 Load: 33.6 t ADT: 99
NO DATA ENTERED
FairOver: UPPER YELLOWJACKET CREEK
TAKE HWY 12 TO CISPUS RIV, Skamania, WA
Built 1954 Load: 33.6 t ADT: 30
NO DATA ENTERED
FairOver: TROUT CREEK
8 1/2 MILES NW OF HWY 141, Skamania, WA
Built 1966 Load: 33.6 t ADT: 30
SALMON FALLS ROAD
FairOver: WASHOUGAL RIVER
3.39 N JCT SR 14, Skamania, WA
Built 1961 Load: 34.0 t ADT: 352
NO DATA ENTERED
FairOver: COYOTE CREEK
ABOUT 9 MILES SOUTHWEST O, Skamania, WA
Built 1962 Load: 34.5 t ADT: 118
NO DATA ENTERED
FairOver: RUSH CREEK
6 1/2 MILES SE OF JCT. FS, Skamania, WA
Built 1966 Load: 35.4 t ADT: 99
NO DATA ENTERED
FairOver: LOST CREEK
ABOUT 13 1/2 MILES SOUTHW, Skamania, WA
Built 1955 Load: 36.3 t ADT: 30
NO DATA ENTERED
FairOver: GREEN FORK
14.3 MILES EAST OF JCT. E, Skamania, WA
Built 1986 Load: 38.1 t ADT: 10
NO DATA ENTERED
FairOver: QUARTZ CREEK
16.9 MILES EAST OF JCT. R, Skamania, WA
Built 1969 Load: 40.0 t ADT: 99
NO DATA ENTERED
FairOver: TWIN FALLS CREEK
1.4 MILE NORTH OF TROUT L, Skamania, WA
Built 1964 Load: 40.0 t ADT: 179
NO DATA ENTERED
FairOver: GREEN RIVER
1 MILE SOUTH OF HWY 112 J, Skamania, WA
Built 1971 Load: 40.0 t ADT: 20
NO DATA ENTERED
FairOver: COMPASS CREEK
TAKE HWY. 30 OFF HWY 14;, Skamania, WA
Built 2010 Load: 40.2 t ADT: 50
NO DATA ENTERED
FairOver: LEWIS RIVER
28.4 MILES EAST OF FOREST, Skamania, WA
Built 1967 Load: 40.9 t ADT: 400
NO DATA ENTERED
FairOver: TRIBUTARY TO QUARTZ CK
NO DATA ENTERED, Skamania, WA
Built 2004 Load: 41.8 t ADT: 50
NO DATA ENTERED
FairOver: TROUT LAKE CREEK
1 1/2 MILES WEST OF TROUT, Skamania, WA
Built 1981 Load: 49.9 t ADT: 40
NO DATA ENTERED
FairOver: LEWIS RIVER
15.6 MILES ON FS RD 90., Skamania, WA
Built 1989 Load: 50.8 t ADT: 390
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.