County profile · official public datasets

Wallowa County, OR

115 public highway bridges tracked in the FHWA National Bridge Inventory: 53.9% rated Good, 37.4% Fair, 8.7% Poor.

115
Public bridges
53.9%
Good condition
8.7%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Wallowa County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

34th
of 36 on Poor share
8.7%
Poor-condition share
115
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.

Wallowa County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Wallowa County ranks #34 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.7%). Wallowa County, Oregon contains 115 public highway bridges. Roughly 53.9% are rated “Good,” 37.4% “Fair,” and 8.7% “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.

Total bridges

115

Public highway bridges in Wallowa County

Good condition

53.9%

62 of 115 rated 7-9

Fair condition

37.4%

43 of 115 rated 5-6

Poor condition

8.7%

10 of 115 rated 4 or below

In-state Poor-share rank

#34 of 36

Among Oregon counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 115 NBI-tracked bridges by lowest applicable component rating.

Good
53.9% (62)
Fair
37.4% (43)
Poor
8.7% (10)

Wallowa County's Poor-condition bridges carry 2,045 vehicle crossings a day

That is 3.8% of the county's reported daily bridge traffic on 8.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 205 crossings a day against 593 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 115 of 115 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

48.7% of Wallowa County's bridges have passed the 50-year mark

56 of the 115 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 53.9% 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 46% of the county's Poor-condition bridge traffic

WEST WALLOWA AVE over WRENN DOBBIN DITCH, built 1942, carries 940 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 10-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,045 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Wallowa County's bridges were built

115 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1950s, when 23 of the county's bridges still in the inventory were built, which is 20% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year (1978) matches the Oregon average (1975).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Wallowa County compares with Oregon's closest counties by inventory size

The 5 Oregon counties nearest Wallowa County in number of bridges, with their condition splits. Its 8.7% Poor share is the 5th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1979 is in line with the group.

Showing the 5 closest of 35 Oregon counties eligible for comparison.

Bridge inventory size and condition shares for Wallowa County and the 5 Oregon counties closest to it in inventory size
County Bridges Poor
Grant County 144 5.6%
Harney County 130 2.3%
Columbia County 126 8.7%
Wallowa County (this page) 115 8.7%
Curry County 101 4%
Lake County 94 6.4%

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 Wallowa 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 Wallowa County, both outside Oregon so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OR (115 bridges here).

Similar average build year

Nearest mean year-built outside OR (1978 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 115 Good 62 Fair 43 Poor 10

Good-condition bridges (62)

USFS Road

Good

Over: CARROL CREEK

2.5 mi SW of Big Sheep #1, Wallowa, OR

Built 2012 ADT: 10

USFS ROAD

Good

Over: BILLY CREEK

NO DATA ENTERED, Wallowa, OR

Built 2005 Load: 17.2 t ADT: 30

CROW CREEK ROAD

Good

Over: NORTH PRAIRIE CREEK

1.22 MI N OF HWY 82, Wallowa, OR

Built 1958 Load: 18.3 t ADT: 466

OR 82 (HWY 010)

Good

Over: WALLOWA RIVER (RAILROAD)

052 MI W JCT ORE 3, Wallowa, OR

Built 1966 Load: 18.8 t ADT: 4,724

WEST WALLOWA AVE

Good

Over: BIG BEND DITCH

W OF JOSEPH @ MILL ST, Wallowa, OR

Built 1935 Load: 19.4 t ADT: 914

CROW CREEK ROAD

Good

Over: PRAIRIE CR

0.32 MI N HIGHWAY 82, Wallowa, OR

Built 1958 Load: 19.6 t ADT: 349

HWY 350

Good

Over: LITTLE SHEEP CREEK

151 MI NE JCT ORE 82, Wallowa, OR

Built 1962 Load: 20.4 t ADT: 186

BAKER ROAD

Good

Over: LOSTINE RIVER

0.5 MI N OF HWY 82, Wallowa, OR

Built 1976 Load: 20.4 t ADT: 196

FISH HATCHERY RD

Good

Over: HURRICANE CREEK

0.7 MI W OF DEPOT STREET, Wallowa, OR

Built 1958 Load: 23.3 t ADT: 959

FRONTAGE RD

Good

Over: BEAR CREEK

0.04 MI W OF HWY 82, Wallowa, OR

Built 2007 Load: 23.3 t ADT: 44

UPPER IMNAHA ROAD

Good

Over: IMNAHA RIVER

12.6 MI S OF HWY 350, Wallowa, OR

Built 1978 Load: 24.6 t ADT: 94

FISH HATCHERY LANE

Good

Over: WALLOWA RIVER

0.1 MI S OF HWY 82, Wallowa, OR

Built 2011 Load: 24.6 t ADT: 247

NO DATA ENTERED

Good

Over: IMNAHA RIVER

INDIAN CROSSING CG, Wallowa, OR

Built 1965 Load: 25.4 t ADT: 20

OR 82 (HWY 010)

Good

Over: TROUT CREEK

1.9 MI. NW JCT. OR 3, Wallowa, OR

Built 1988 Load: 25.6 t ADT: 4,724

LITTLE BEAR CK RD

Good

Over: BEAR CREEK

NO DATA ENTERED, Wallowa, OR

Built 1967 Load: 26.3 t ADT: 20

USFS Road

Good

Over: DEER CREEK

NO DATA ENTERED, Wallowa, OR

Built 2008 Load: 26.6 t ADT: 40

Hatchery Road

Good

Over: Spring Creek

W. of Fish Ponds, Wallowa, OR

Built 1985 Load: 27.2 t ADT: 10

WALLUPA ROAD

Good

Over: GRANDE RONDE RIVER

30.7 MI N OF HWY 82, Wallowa, OR

Built 1986 Load: 32.4 t ADT: 70

BIG CANYON ROAD

Good

Over: DEER CREEK

NO DATA ENTERED, Wallowa, OR

Built 1997 Load: 32.7 t ADT: 40

DEER CREEK ROAD

Good

Over: WALLOWA RIVER

0.1 MI S OF HWY 82, Wallowa, OR

Built 2016 Load: 34.7 t ADT: 31

HWY 350

Good

Over: CAMP CREEK

28.1 MI NE JCT ORE-82, Wallowa, OR

Built 1991 Load: 35.0 t ADT: 251

DORRENCE LANE

Good

Over: WALLOWA RIVER

0.9 MI W OF HWY 82, Wallowa, OR

Built 2011 Load: 36.3 t ADT: 150

WHISKEY CREEK ROAD

Good

Over: WHISKEY CREEK

3.8 MI N OF HWY 82, Wallowa, OR

Built 2013 Load: 37.3 t ADT: 156

HERSHELL LN

Good

Over: LOSTINE RIVER

0.6 MI S OF HWY 82, Wallowa, OR

Built 2016 Load: 37.6 t ADT: 72

CAMP CREEK RD

Good

Over: TRAIL CREEK

1.7 MI W OF HWY 350, Wallowa, OR

Built 2013 Load: 37.9 t ADT: 80

SCHOOL FLAT ROAD

Good

Over: WALLOWA RIVER

0.3 MI E OF JIMTOWN ROAD, Wallowa, OR

Built 1999 Load: 38.2 t ADT: 99

RIVER CANYON ROAD

Good

Over: IMNAHA RIVER

22.6 MI S OF HWY 350, Wallowa, OR

Built 2011 Load: 38.6 t ADT: 30

FARMERS LANE

Good

Over: HURRICANE CREEK

0.4 MI W HURRICANE CR RD, Wallowa, OR

Built 1979 Load: 39.0 t ADT: 319

OR 82 (HWY 010)

Good

Over: PRAIRIE CREEK

007 MI SE JCT ORE 3, Wallowa, OR

Built 1985 Load: 39.2 t ADT: 4,172

LOWER IMNAHA ROAD

Good

Over: IMNAHA RIVER

5.1 MI N OF HWY 350, Wallowa, OR

Built 2006 Load: 39.2 t ADT: 103

BRAMLET LANE

Good

Over: DRY CR BRAMLET CEMETERY

1.09 MILES NE HWY 82, Wallowa, OR

Built 1988 Load: 39.2 t ADT: 170

HURRICANE CR RD

Good

Over: WALLOWA RIVER

0.6 MI S OF HWY 82, Wallowa, OR

Built 1964 Load: 39.9 t ADT: 940

WHISKEY CREEK ROAD

Good

Over: WHISKEY CREEK

3.8 MI N OF HWY 82, Wallowa, OR

Built 1974 Load: 41.7 t ADT: 156

CARROL CK ROAD

Good

Over: BIG SHEEP CK

NO DATA ENTERED, Wallowa, OR

Built 1999 Load: 41.8 t ADT: 10

LOSTINE RIVER ROAD

Good

Over: LOSTINE RIVER

NO DATA ENTERED, Wallowa, OR

Built 1970 Load: 41.8 t ADT: 100

UPPER IMNAHA ROAD

Good

Over: IMNAHA RIVER

21.1 MI S OF HWY 350, Wallowa, OR

Built 2006 Load: 42.6 t ADT: 36

BEAR CREEK RD

Good

Over: BEAR CREEK

3.0 MI SW OF HWY 82, Wallowa, OR

Built 2007 Load: 43.4 t ADT: 29

HURRICANE CR RD

Good

Over: HURRICANE CREEK

1.5 MI S OF HWY 82, Wallowa, OR

Built 1964 Load: 44.1 t ADT: 1,754

EGGLESSON ROAD

Good

Over: WALLOWA RIVER

1.1 MI W OF HWY 82, Wallowa, OR

Built 2004 Load: 44.4 t ADT: 167

BIG CANYON ROAD

Good

Over: WALLOWA RIVER

INTER HWY 82 & USFS #8270, Wallowa, OR

Built 1969 Load: 45.4 t ADT: 80

OR 82 (HWY 010)

Good

Over: PRAIRIE CREEK

IN ENTERPRISE, Wallowa, OR

Built 1999 Load: 45.4 t ADT: 5,630

BAILEY LANE

Good

Over: WALLOWA RIVER

0.1 MI W OF HWY 82, Wallowa, OR

Built 2005 Load: 45.4 t ADT: 235

OR 82 (HWY 010)

Good

Over: ROCK CREEK

9.3 MI. E. UNION CO. LINE, Wallowa, OR

Built 1995 Load: 45.7 t ADT: 1,528

UPPER DIAMOND LANE

Good

Over: BEAR CREEK

0.3 MI W OF HWY 82, Wallowa, OR

Built 1970 Load: 46.0 t ADT: 521

HWY 350

Good

Over: LITTLE SHEEP CREEK

14.4 MI. NE JCT. OR 82, Wallowa, OR

Built 2001 Load: 46.7 t ADT: 186

HWY 350

Good

Over: LITTLE SHEEP CREEK

13.7 MI. NE JCT. OR 82, Wallowa, OR

Built 2001 Load: 47.0 t ADT: 186

GOLF COURSE ROAD

Good

Over: TROUT CREEK

0.7 MI N OF HWY 82, Wallowa, OR

Built 2005 Load: 47.2 t ADT: 276

WADE GULCH ROAD

Good

Over: WALLOWA RIVER

0.3 MI E OF HWY 82, Wallowa, OR

Built 2001 Load: 47.6 t ADT: 65

UPPER IMNAHA ROAD

Good

Over: IMNAHA RIVER

19.3 MI S OF HWY 350, Wallowa, OR

Built 2006 Load: 48.1 t ADT: 70

GREENWOOD STREET

Good

Over: PRAIRIE CREEK

2 BLKS. SO. HWY 82, Wallowa, OR

Built 1997 Load: 48.3 t ADT: 80

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.