Total bridges
115
Public highway bridges in Wallowa County
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.
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
- 1910s 2
1910–1919
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s
1950–1959
23 bridges
- 1960s
1960–1969
20 bridges
- 1970s
1970–1979
10 bridges
- 1980s
1980–1989
10 bridges
- 1990s
1990–1999
15 bridges
- 2000s
2000–2009
20 bridges
- 2010s 9
2010–2019
9 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).
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.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Grant County | 144 | 45.1% | 49.3% | 5.6% | 1980 |
| Harney County | 130 | 54.6% | 43.1% | 2.3% | 1985 |
| Columbia County | 126 | 32.5% | 58.7% | 8.7% | 1978 |
| Wallowa County (this page) | 115 | 53.9% | 37.4% | 8.7% | 1978 |
| Curry County | 101 | 31.7% | 64.4% | 4% | 1969 |
| Lake County | 94 | 47.9% | 45.7% | 6.4% | 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 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).
- Alachua County, FL · 115 bridges
- Walton County, GA · 115 bridges
- Latah County, ID · 115 bridges
- Whitley County, IN · 115 bridges
Similar average build year
Nearest mean year-built outside OR (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.
All bridges (115)
SE FLORENCE STREET
GoodOver: PRAIRIE CREEK
0.02 MI MI S OF HWY 82, Wallowa, OR
Built 2005 Load: 54.4 t ADT: 81
WALLUPA ROAD
GoodOver: Wildcat Creek
26.92 MI N OF HWY 82, Wallowa, OR
Built 2007 Load: 54.8 t ADT: 70
WALLUPA ROAD
GoodOver: Wallupa Creek
21.42 MI N OF HWY 82, Wallowa, OR
Built 2007 Load: 59.0 t ADT: 70
Entrance Road
GoodOver: Deer Creek
RTE 400 ENTRANCE RD, Wallowa, OR
Built 1987 Load: 60.8 t ADT: 1
OR 82 (HWY 010)
GoodOver: PRAIRIE CREEK
3.3 MI. E. JCT. OR 3, Wallowa, OR
Built 1980 Load: 69.0 t ADT: 3,361
DUG BAR ROAD
PoorOver: COW CREEK
COW CREEK RANCH, Wallowa, OR
Built 1951 ADT: 10
SHEEP CREEK ROAD
PoorOver: BIG SHEEP CREEK
7.5 MI E OF HWY 350, Wallowa, OR
Built 1950 Load: 6.8 t ADT: 7
MONTCLAIR STREET
PoorOver: PRAIRIE CREEK
2 BLKS SO HWY 82, Wallowa, OR
Built 1952 Load: 9.4 t ADT: 80
REPPLINGER LANE
PoorOver: FARMERS DITCH
Repplinger Ln, Wallowa, OR
Built 1950 Load: 10.0 t ADT: 267
WEST WALLOWA AVE
PoorOver: WRENN DOBBIN DITCH
0.1 MI W OF HWY 82, Wallowa, OR
Built 1942 Load: 10.7 t ADT: 940
DUG BAR ROAD
PoorOver: COW CREEK
MP 13.99 RD 4260, Wallowa, OR
Built 1951 Load: 12.0 t ADT: 103
LEWIS ROAD
PoorOver: CHESNIMNUS CREEK
10.2 MI N OF CROW CR ROAD, Wallowa, OR
Built 1975 Load: 20.7 t ADT: 39
BEAR CREEK RD
PoorOver: BEAR CREEK
5.3 MI S OF HWY 82, Wallowa, OR
Built 1956 Load: 20.7 t ADT: 28
WHISKEY CREEK ROAD
PoorOver: WALLOWA RIVER
0.15 MI E OF HWY 82, Wallowa, OR
Built 1967 Load: 23.7 t ADT: 346
WALLOWA LOOP ROAD
PoorOver: BIG SHEEP CREEK
NO DATA ENTERED, Wallowa, OR
Built 1950 Load: 26.3 t ADT: 225
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.