County profile · official public datasets

Umatilla County, OR

321 public highway bridges tracked in the FHWA National Bridge Inventory: 31.5% rated Good, 64.5% Fair, 4% Poor.

321
Public bridges: 31.5%
Good condition: 4%
Poor condition

The verdict

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

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

21st
of 36 on Poor share: 4%
Poor-condition share: 321
public highway bridges: 1973
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.

Umatilla County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Umatilla County ranks #21 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4%). Umatilla County, Oregon contains 321 public highway bridges. Roughly 31.5% are rated “Good,” 64.5% “Fair,” and 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.

Total bridges

321

Public highway bridges in Umatilla County

Good condition

31.5%

101 of 321 rated 7-9

Fair condition

64.5%

207 of 321 rated 5-6

Poor condition

13 of 321 rated 4 or below

In-state Poor-share rank

#21 of 36

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

Condition distribution

Share of 321 NBI-tracked bridges by lowest applicable component rating.

Good

31.5% (101)

Fair

64.5% (207)

Poor

4% (13)

Umatilla County's Poor-condition bridges carry 9,775 vehicle crossings a day

That is 1.4% of the county's reported daily bridge traffic on 4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 752 crossings a day against 1,940 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 321 of 321 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.1% of Umatilla County's bridges have passed the 50-year mark

177 of the 321 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 31.5% 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 86.4% of the county's Poor-condition bridge traffic

WEST HIGHLAND EXT. over UMATILLA RIVER, built 1966, carries 8,447 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 13-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 9,775 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

18
1930s

8
1940s

4
1950s

42
1960s

90
1970s

20
1980s

55
1990s

35
2000s

33
2010s

10
2020s

4

What this shows Construction peaked in the 1960s, when 90 of the county's bridges still in the inventory were built, which is 28% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1973) matches the Oregon average (1975).

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

The 5 Oregon counties nearest Umatilla County in number of bridges, with their condition splits. Its 4% Poor share is the 4th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1977 is in line with the group.

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

Bridge inventory size and condition shares for Umatilla County and the 5 Oregon counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Marion County	373	21.2%	74.5%	4.3%	1971
Clackamas County	367	31.1%	66.5%	2.5%	1975
Washington County	326	35.6%	62%	2.5%	1983
Umatilla County (this page)	321	31.5%	64.5%	4%	1973
Coos County	254	40.9%	55.9%	3.1%	1978
Klamath County	248	46%	48.8%	5.2%	1979

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

Similar inventory size

Nearest county inventories outside OR (321 bridges here).

Christian County, IL · 321 bridges
Jackson County, IN · 321 bridges
Auglaize County, OH · 321 bridges
Columbiana County, OH · 321 bridges

Similar average build year

Nearest mean year-built outside OR (1973 here).

Jefferson County, AL · avg 1973 · 1,068 bridges
Erie County, NY · avg 1973 · 906 bridges
Davidson County, TN · avg 1973 · 832 bridges
Lancaster County, PA · avg 1973 · 801 bridges

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

All 321 Good 101 Fair 207 Poor 13

All bridges (321)

Sort:

Umatilla County Bridge Snapshot

Condition distribution

Umatilla County's Poor-condition bridges carry 9,775 vehicle crossings a day

55.1% of Umatilla County's bridges have passed the 50-year mark

One structure carries 86.4% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (321)

MIDWAY ROAD

OR 11 (HWY 008)

N JUNIPER CYN RD

S. EDWARDS ROAD

ROAD

OR 74 (HWY 052)

WHITEHOUSE ROAD

US 730 (HWY 002)

OR 37 (HWY 036)

I-84 (HWY 006) WB

GURDANE ROAD

GERKING FLAT ROAD

ADAMS RD

I-82 (HWY 070) WB

I-82 (HWY 070) EB

SOAP HILL ROAD

HWY 335

DESPAIN GULCH ROAD

NORTH ASH ROAD

DESPAIN GULCH ROAD

S FK WALLA WALLA

BINGHAM ROAD

RIETH ROAD

WESTLAND ROAD

HOEFT ROAD

UMATILLA RIVER RD

RINGEL ROAD

HWY 331

I-84 (HWY 006) EB

WEST MAIN STREET

I-84 (HWY 006) WB

I-84 (HWY 006) EB

M. JOHNS ROAD

COMMERCIAL STREET

ECHO MEADOWS ROAD

CABLE CREEK ROAD

HOLDMAN ROAD

HWY 331

MIDWAY ROAD

I-84 (HWY 006) WB

ROTHROCK ROAD

HWY 339

HWY 339

I-84 (HWY 006) WB

I-84 (HWY 006) EB

OR 244 (HWY 341)

Emert Road

BIRCH CREEK ROAD

SHAFER ROAD

ROAD

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