Total bridges
363
Public highway bridges in Grays Harbor County
County profile · official public datasets
Grays Harbor County, WA
363 public highway bridges tracked in the FHWA National Bridge Inventory: 48.8% rated Good, 41.9% Fair, 9.4% Poor.
- 363
- Public bridges
- 48.8%
- Good condition
- 9.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Grays Harbor County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 32nd
- of 39 on Poor share
- 9.4%
- Poor-condition share
- 363
- public highway bridges
- 1978
- 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.
Grays Harbor County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Grays Harbor County ranks #32 of 39 Washington counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.4%). Grays Harbor County, Washington contains 363 public highway bridges. Roughly 48.8% are rated “Good,” 41.9% “Fair,” and 9.4% “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
48.8%
177 of 363 rated 7-9
Fair condition
41.9%
152 of 363 rated 5-6
Poor condition
9.4%
34 of 363 rated 4 or below
In-state Poor-share rank
#32 of 39
Among Washington counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 363 NBI-tracked bridges by lowest applicable component rating.
Good 48.8% (177)
Fair 41.9% (152)
Poor 9.4% (34)
Grays Harbor County's Poor-condition bridges carry 153,497 vehicle crossings a day
That is 18.9% of the county's reported daily bridge traffic on 9.4% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,515 crossings a day against 1,699 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 363 of 363 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
48.8% of Grays Harbor County's bridges have passed the 50-year mark
177 of the 363 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 48.8% 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 16.7% of the county's Poor-condition bridge traffic
US 101 over CHEHALIS RIVER, built 1955, carries 25,602 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 34-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 153,497 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Grays Harbor County's bridges were built
363 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 10
1920–1929
10 bridges
- 1930s 17
1930–1939
17 bridges
- 1940s 12
1940–1949
12 bridges
- 1950s
1950–1959
39 bridges
- 1960s
1960–1969
62 bridges
- 1970s
1970–1979
65 bridges
- 1980s
1980–1989
47 bridges
- 1990s 12
1990–1999
12 bridges
- 2000s
2000–2009
37 bridges
- 2010s
2010–2019
50 bridges
- 2020s 9
2020–2029
9 bridges
What this shows Construction peaked in the 1970s, when 65 of the county's bridges still in the inventory were built, which is 17.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1978) matches the Washington average (1975).
How Grays Harbor County compares with Washington's closest counties by inventory size
The 5 Washington counties nearest Grays Harbor County in number of bridges, with their condition splits. Its 9.4% Poor share is the 5th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1973 is 5 years newer.
Showing the 5 closest of 38 Washington counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Lewis County | 419 | 39.4% | 56.8% | 3.8% | 1969 |
| Grays Harbor County (this page) | 363 | 48.8% | 41.9% | 9.4% | 1978 |
| Whatcom County | 354 | 44.1% | 50.6% | 5.4% | 1970 |
| Whitman County | 347 | 52.2% | 44.4% | 3.5% | 1974 |
| Kittitas County | 308 | 39% | 50.6% | 10.4% | 1973 |
| Spokane County | 307 | 51.1% | 42% | 6.8% | 1978 |
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 Grays Harbor 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 Grays Harbor County, both outside Washington so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WA (363 bridges here).
- Muskingum County, OH · 363 bridges
- Lackawanna County, PA · 363 bridges
- Gibson County, IN · 362 bridges
- Fayette County, IA · 362 bridges
Similar average build year
Nearest mean year-built outside WA (1978 here).
- Orange County, CA · avg 1978 · 1,164 bridges
- Sumner County, KS · avg 1978 · 659 bridges
- Allen County, IN · avg 1978 · 613 bridges
- Livingston County, IL · avg 1978 · 579 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (152)
NO DATA ENTERED
FairOver: DONKEY CREEK
NO DATA ENTERED, Grays Harbor, WA
Built 1950 Load: 31.8 t ADT: 150
IRR BIA RTE 26
FairOver: RED CREEK
23 KM NE OF MOCLIPS, Grays Harbor, WA
Built 1964 Load: 32.4 t ADT: 375
IRR BIA RTE 26
FairOver: ELK CREEK
26 KM NE OF MOCLIPS, Grays Harbor, WA
Built 1964 Load: 32.4 t ADT: 375
ROUTE 109
FairOver: QUINAULT RIVER
.9 KM N CUITAN STREET, Grays Harbor, WA
Built 1963 Load: 32.4 t ADT: 50
IRR BIA RTE 2
FairOver: MOCLIPS RIVER
3 KM NE OF MOCLIPS, Grays Harbor, WA
Built 1965 Load: 32.6 t ADT: 8
SR 105
FairOver: CAMPBELL CREEK
13.1 N JCT SR 105 SP, Grays Harbor, WA
Built 1945 Load: 32.7 t ADT: 6,067
US 12
FairOver: SATSOP RIVER
5.2 E JCT SR 107, Grays Harbor, WA
Built 1965 Load: 32.7 t ADT: 11,538
NO DATA ENTERED
FairOver: WYNOOCHEE RIVER
NO DATA ENTERED, Grays Harbor, WA
Built 1973 Load: 32.7 t ADT: 100
WYNOOCHE WISHKAH
FairOver: WYNOOCHEE RIVER
0.4 W JCT WYN VAL, Grays Harbor, WA
Built 1982 Load: 32.7 t ADT: 728
BLACK CREEK ROAD
FairOver: BLACK CREEK
03.6 NE JCT 9519, Grays Harbor, WA
Built 1977 Load: 32.7 t ADT: 117
HOQUIAM WISHKAH RD
FairOver: WISHKAH RIVER
11.7 N ABERDEEN, Grays Harbor, WA
Built 1968 Load: 32.7 t ADT: 1,379
NEWMAN CREEK ROAD
FairOver: NEWMAN CREEK
01.1 N JCT 9710, Grays Harbor, WA
Built 1976 Load: 32.7 t ADT: 184
US 101
FairOver: BERNARD CR
4.4 N JCT SR 109, Grays Harbor, WA
Built 1957 Load: 33.0 t ADT: 4,908
NO DATA ENTERED
FairOver: N FK BR WYNOOCHEE RIVER
NO DATA ENTERED, Grays Harbor, WA
Built 1957 Load: 33.6 t ADT: 50
OLSON ROAD
FairOver: ZIEGLER CREEK
0.2 S JCT 9340, Grays Harbor, WA
Built 1985 Load: 33.6 t ADT: 15
NORTON ROAD
FairOver: WILLIAMS CREEK
01.2 W JCT 9641, Grays Harbor, WA
Built 1962 Load: 33.6 t ADT: 18
ARTERIAL ROAD
FairOver: RAFT RIVER
1.8 MILE NORTH OF SR 101, Grays Harbor, WA
Built 1975 Load: 34.5 t ADT: 124
NO DATA ENTERED
FairOver: TEA CREEK
NO DATA ENTERED, Grays Harbor, WA
Built 1961 Load: 34.5 t ADT: 50
WENZEL SLOUGH ROAD
FairOver: NEWMAN CREEK
04.1 W JCT 9641, Grays Harbor, WA
Built 1971 Load: 34.5 t ADT: 102
US 101
FairOver: N FK RAFT RIVER
52.2 N JCT SR 109, Grays Harbor, WA
Built 1958 Load: 35.3 t ADT: 1,138
US 101
FairOver: HUMPTULIPS RIVER
21.5 N JCT SR 109, Grays Harbor, WA
Built 1950 Load: 35.4 t ADT: 2,251
DEVONSHIRE ROAD
FairOver: US 12
9.5 E JCT US 101, Grays Harbor, WA
Built 1991 Load: 37.2 t ADT: 2,917
WAKEFIELD ROAD
FairOver: CHEHALIS R - ELBOW RIFFL
1.6 S JCT SR 12, Grays Harbor, WA
Built 1978 Load: 37.2 t ADT: 1,180
OCEAN BEACH ROAD
FairOver: HUMPTULIPS OVERFLOW CHAN
7.2 NW JCT US 101, Grays Harbor, WA
Built 1973 Load: 37.2 t ADT: 2,619
ELMA MCCLEARY ROAD
FairOver: CLOQUALLUM CREEK
1.6 E JCT SR 8, Grays Harbor, WA
Built 1921 Load: 37.2 t ADT: 1,863
US 101
FairOver: LITTLE HOQUIAM R
1.4 N JCT SR 109, Grays Harbor, WA
Built 1958 Load: 38.1 t ADT: 5,422
NO DATA ENTERED
FairOver: BIG CREEK
NO DATA ENTERED, Grays Harbor, WA
Built 1971 Load: 38.1 t ADT: 10
SOUTH BANK ROAD
FairOver: ROCK CREEK
SOUTH OF LANGABEER ROAD, Grays Harbor, WA
Built 1971 Load: 38.1 t ADT: 475
EAST WISHKAH ROAD
FairOver: BEAR CREEK
01.4 NE JCT 9431, Grays Harbor, WA
Built 1976 Load: 38.1 t ADT: 200
OCEAN BEACH ROAD
FairOver: HUMPTULIPS RIVER OVERFLO
7.2 NW JCT US 101, Grays Harbor, WA
Built 1966 Load: 38.6 t ADT: 2,619
NO DATA ENTERED
FairOver: W F SATSOP RIVER
NO DATA ENTERED, Grays Harbor, WA
Built 1964 Load: 39.0 t ADT: 15
BLACK CREEK ROAD
FairOver: BLACK CREEK
02.0 NE JCT 9519, Grays Harbor, WA
Built 1976 Load: 39.0 t ADT: 156
ONEILL ROAD
FairOver: NEWMAN CREEK
0.7 N JCT CR 9710, Grays Harbor, WA
Built 1972 Load: 39.9 t ADT: 126
NO DATA ENTERED
FairOver: BOULDER CREEK
NO DATA ENTERED, Grays Harbor, WA
Built 1983 Load: 40.8 t ADT: 50
HEISE ROAD
FairOver: WILDCAT CREEK
0.06 S JCT 9710, Grays Harbor, WA
Built 1980 Load: 40.8 t ADT: 347
NEWMAN MID BR ROAD
FairOver: NEWMAN CREEK
02.1 N JCT 9710, Grays Harbor, WA
Built 1976 Load: 41.7 t ADT: 41
NO DATA ENTERED
FairOver: WYNOOCHEE RIVER
NO DATA ENTERED, Grays Harbor, WA
Built 1956 Load: 41.8 t ADT: 50
US 101
FairOver: WEST FORK HOQUIAM RIVER
9.2 N JCT SR 109, Grays Harbor, WA
Built 1949 Load: 44.4 t ADT: 2,205
NO DATA ENTERED
FairOver: STEVENS CREEK
NO DATA ENTERED, Grays Harbor, WA
Built 2005 Load: 44.7 t ADT: 10
QUINAULT S SHORE
FairOver: FALLS CREEK
2.3 NE JCT US 101, Grays Harbor, WA
Built 1973 Load: 45.4 t ADT: 962
US 101
FairOver: HUMPTULIPS OVERFLOW
21.3 N JCT SR 109, Grays Harbor, WA
Built 1950 Load: 46.3 t ADT: 2,251
US 12
FairOver: US 12
JCT SR 8, Grays Harbor, WA
Built 1963 Load: 46.3 t ADT: 8,371
US 12
FairOver: US 12
JCT SR 8, Grays Harbor, WA
Built 1963 Load: 46.3 t ADT: 8,371
US 12
FairOver: NP RY
10.0 E JCT SR 107, Grays Harbor, WA
Built 1964 Load: 46.3 t ADT: 12,029
QUINAULT S SHORE
FairOver: STORM BRANCH
7.7 NE JCT US 101, Grays Harbor, WA
Built 1982 Load: 47.2 t ADT: 199
QUINAULT S SHORE
FairOver: WILLABY CREEK
1.4 NE JCT US 101, Grays Harbor, WA
Built 1973 Load: 51.8 t ADT: 1,328
US 12
FairOver: PORTER CREEK
6.1 E JCT SR 8, Grays Harbor, WA
Built 1937 Load: 54.4 t ADT: 5,708
SR 105
FairOver: STAFFORD CR
12.1 N JCT SR 105 SP, Grays Harbor, WA
Built 1945 Load: 58.0 t ADT: 6,067
SR 105
FairOver: CHAPIN CREEK
13.6 N JCT SR 105 SP, Grays Harbor, WA
Built 1940 Load: 66.2 t ADT: 6,067
IRR BIA RTE 26
FairOver: HALL CREEK
15 KM N.E. OF MOCLIPS, Grays Harbor, WA
Built 1994 Load: 89.8 t ADT: 365
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.