County profile · official public datasets

Morrow County, OR

70 public highway bridges tracked in the FHWA National Bridge Inventory: 45.7% rated Good, 51.4% Fair, 2.9% Poor.

70
Public bridges: 45.7%
Good condition: 2.9%
Poor condition

The verdict

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

Morrow County posts a better-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.

Top 39%
lowest Poor share in state: 2.9%
Poor-condition share: 70
public highway bridges: 1975
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.

Morrow County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Morrow County ranks #14 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.9%). Morrow County, Oregon contains 70 public highway bridges. Roughly 45.7% are rated “Good,” 51.4% “Fair,” and 2.9% “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

Public highway bridges in Morrow County

Good condition

45.7%

32 of 70 rated 7-9

Fair condition

51.4%

36 of 70 rated 5-6

Poor condition

2.9%

2 of 70 rated 4 or below

In-state Poor-share rank

#14 of 36

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

Condition distribution

Share of 70 NBI-tracked bridges by lowest applicable component rating.

Good

45.7% (32)

Fair

51.4% (36)

Poor

2.9% (2)

Morrow County's Poor-condition bridges carry 96 vehicle crossings a day

That is 0.1% of the county's reported daily bridge traffic on 2.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 48 crossings a day against 1,013 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 70 of 70 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

42.9% of Morrow County's bridges have passed the 50-year mark

30 of the 70 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 45.7% 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 84.4% of the county's Poor-condition bridge traffic

CLARKS CANYON ROAD over WILLOW CREEK EB, built 1983, carries 81 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 2-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 96 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

4
1930s

2
1950s

3
1960s

16
1970s

7
1980s

20
1990s

8
2000s

6
2010s

3

What this shows Construction peaked in the 1980s, when 20 of the county's bridges still in the inventory were built, which is 28.6% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1975) matches the Oregon average (1975).

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

The 5 Oregon counties nearest Morrow County in number of bridges, with their condition splits. Its 2.9% Poor share is the 4th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1976 is in line with the group.

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

Bridge inventory size and condition shares for Morrow County and the 5 Oregon counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Lake County	94	47.9%	45.7%	6.4%	1981
Hood River County	82	48.8%	48.8%	2.4%	1977
Jefferson County	80	46.3%	46.3%	7.5%	1980
Crook County	79	46.8%	53.2%	0%	1980
Morrow County (this page)	70	45.7%	51.4%	2.9%	1975
Sherman County	48	33.3%	66.7%	0%	1963

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

Similar inventory size

Nearest county inventories outside OR (70 bridges here).

Jefferson County, FL · 70 bridges
Jasper County, GA · 70 bridges
Treutlen County, GA · 70 bridges
Turner County, GA · 70 bridges

Similar average build year

Nearest mean year-built outside OR (1975 here).

San Bernardino County, CA · avg 1975 · 1,422 bridges
Fulton County, GA · avg 1975 · 775 bridges
Westmoreland County, PA · avg 1975 · 620 bridges
Monroe County, NY · avg 1975 · 615 bridges

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

All 70 Good 32 Fair 36 Poor 2

All bridges (70)

Sort:

Morrow County Bridge Snapshot

Condition distribution

Morrow County's Poor-condition bridges carry 96 vehicle crossings a day

42.9% of Morrow County's bridges have passed the 50-year mark

One structure carries 84.4% of the county's Poor-condition bridge traffic

How Morrow 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 (70)

BUNKER HILL LANE

WILLOW CR RD

RIVERSIDE AVENUE

MORTER LANE

ANSON PARK RD

OR 74 (HWY 052)

LITTLEBUTTER CR RD

RHEA CREEK ROAD

BIG BUTTER CR ROAD

TOWER RD

FULLER CANYON RD

OR 206 (HWY 300)

DIVISION STREET

WILLOW CR RD

SPRING HOLLOW RD

OR 74 (HWY 052)

RHEA CREEK ROAD

BUTTERMILK CAN RD

E. COLUMBIA AVE.

OR 74 (HWY 052)

US 730 (HWY 002)

I-84 (HWY 006)

I-84 (HWY 006) EB

ART DALZELL RD

DIVISION STREET

I-84 (HWY 2) WB

US 730 (HWY 2)

CLARKS CANYON ROAD

PATTERSON FERRY RD

OLEX-MCNAB ROAD

ELDER STREET

PATTERSON FERRY RD

CHASE STREET

MORGAN STREET

MAIN ST

WILSON RD

I-84 (HWY 002) WB

I-84 (HWY 002) EB

UHLMAN BLVD

MAIN ST.

ALFALFA ST

OR 207 (HWY 320)

OR 74 (HWY 052)

IONE-GOOSEBERRY RD

BLACKHORSE CAN RD

PALMATEER ROAD

OR 74 (HWY 052)

OR 207 (HWY 320)

ARCADE STREET

OR 74 (HWY 052)

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