County profile · official public datasets

Harney County, OR

130 public highway bridges tracked in the FHWA National Bridge Inventory: 54.6% rated Good, 43.1% Fair, 2.3% Poor.

130
Public bridges
54.6%
Good condition
2.3%
Poor condition

The verdict

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

Harney County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 22%
lowest Poor share in state
2.3%
Poor-condition share
130
public highway bridges
1985
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.

Harney County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Harney County ranks #8 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.3%). Harney County, Oregon contains 130 public highway bridges. Roughly 54.6% are rated “Good,” 43.1% “Fair,” and 2.3% “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

130

Public highway bridges in Harney County

Good condition

54.6%

71 of 130 rated 7-9

Fair condition

43.1%

56 of 130 rated 5-6

Poor condition

2.3%

3 of 130 rated 4 or below

In-state Poor-share rank

#8 of 36

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

Condition distribution

Share of 130 NBI-tracked bridges by lowest applicable component rating.

Good
54.6% (71)
Fair
43.1% (56)
Poor
2.3% (3)

Harney County's Poor-condition bridges carry 312 vehicle crossings a day

That is 0.6% of the county's reported daily bridge traffic on 2.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 104 crossings a day against 475 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 128 of 130 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

34.6% of Harney County's bridges have passed the 50-year mark

45 of the 130 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 54.6% 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 43.9% of the county's Poor-condition bridge traffic

SOUTH HARNEY ROAD over SILVER CREEK, built 1975, carries 137 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 312 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Harney County's bridges were built

130 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 31 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1985, 10 years newer than the Oregon average of 1975.

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

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

The 5 Oregon counties nearest Harney County in number of bridges, with their condition splits. Its 2.3% Poor share is the 1st-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1976 is 9 years newer.

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

Bridge inventory size and condition shares for Harney County and the 5 Oregon counties closest to it in inventory size
County Bridges Poor
Yamhill County 149 4.7%
Wasco County 148 8.1%
Grant County 144 5.6%
Harney County (this page) 130 2.3%
Columbia County 126 8.7%
Wallowa County 115 8.7%

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

Similar inventory size

Nearest county inventories outside OR (130 bridges here).

Similar average build year

Nearest mean year-built outside OR (1985 here).

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

All 130 Good 71 Fair 56 Poor 3

Good-condition bridges (71)

VANDREWSEY

Good

Over: MIDDLE FORK MALHEUR RIVE

131 MI C305 DREWSEY ROAD, Harney, OR

Built 1975 Load: 44.5 t ADT: 100

IRR C123 WEST LOOP

Good

Over: FOLEY SLOUGH

0068 MI C121 FOLEY DR, Harney, OR

Built 1996 Load: 46.3 t ADT: 152

US 20 (HWY 007)

Good

Over: MILLER CREEK

1.0 MI E JCT. US 395, Harney, OR

Built 2004 Load: 47.6 t ADT: 1,885

IRR C123 WEST LOOP

Good

Over: SILVIES RIVER

010 MI C121 FOLEY DR, Harney, OR

Built 2007 Load: 48.3 t ADT: 180

US 20 (HWY 007)

Good

Over: DRY CREEK

2.0 MI E JCT US 395, Harney, OR

Built 2005 Load: 48.6 t ADT: 1,885

DREWSEY RD

Good

Over: SOUTH DREWSEY SLOUGH

002 MI C306 AT DREWSEY, Harney, OR

Built 2005 Load: 49.0 t ADT: 123

8244: STEENS MOUNT

Good

Over: EAST CANAL

2.95 miles E of Frenchgle, Harney, OR

Built 1966 Load: 49.9 t ADT: 50

DREWSEY RD

Good

Over: NORTH DREWSEY SLOUGH

001 MI C306 AT DREWSEY, Harney, OR

Built 2005 Load: 49.9 t ADT: 174

AIRPORT RD

Good

Over: NINE MILE SLOUGH

008 JCT OR 78, Harney, OR

Built 2009 Load: 49.9 t ADT: 264

PINE CREEK ROAD

Good

Over: PINE CREEK

096 MI C306 VAN DREWSEY, Harney, OR

Built 2004 Load: 50.2 t ADT: 37

US 20 (Hwy 007)

Good

Over: STINKINGWATER CRK

12.5 Mi W Malheur Co Ln, Harney, OR

Built 2004 Load: 50.5 t ADT: 1,234

ISLAND RANCH ROAD

Good

Over: CHAPMAN SLOUGH

016 ORE 205 FR GLEN HWY, Harney, OR

Built 2009 Load: 50.5 t ADT: 90

C119 EBEN RAY RD

Good

Over: WHITING SLOUGH

005 MI US 20/395, Harney, OR

Built 1999 Load: 50.8 t ADT: 85

IRR C123 WEST LOOP

Good

Over: FOLEY SLOUGH

0061 MI C121 FOLEY DR, Harney, OR

Built 1996 Load: 51.7 t ADT: 152

GREENHOUSE LN.

Good

Over: WEST FORK SILVIES RIVER

024 MI US HWY 20, Harney, OR

Built 2005 Load: 51.7 t ADT: 248

C138 SILVER CR RD

Good

Over: SILVER CREEK SLOUGH

009 US HWY 20, Harney, OR

Built 2006 Load: 51.7 t ADT: 127

C119 EBEN RAY RD

Good

Over: FOLEY SLOUGH

007 MI US 20/395, Harney, OR

Built 2000 Load: 52.6 t ADT: 117

IRR C106

Good

Over: NINEMILE SLOUGH

046 US HWY 20, Harney, OR

Built 2006 Load: 52.6 t ADT: 179

PINE CREEK ROAD

Good

Over: SOUTH PINE CREEK

151 M VAN DREWSEY RD C306, Harney, OR

Built 1982 Load: 55.4 t ADT: 73

NO DATA ENTERED

Good

Over: SAWTOOTH CREEK

NO DATA ENTERED, Harney, OR

Built 2010 Load: 58.6 t ADT: 15

C123 WEST LOOP RD

Good

Over: SLOUGH

012 MI C121 FOLEY DRIVE, Harney, OR

Built 2018 Load: 59.0 t ADT: 140

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.