County profile · official public datasets

Sherman County, OR

48 public highway bridges tracked in the FHWA National Bridge Inventory: 33.3% rated Good, 66.7% Fair, 0% Poor.

48
Public bridges: 33.3%
Good condition: 0%
Poor condition

The verdict

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

Sherman County pairs a top-10% lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 6%
lowest Poor share in state: 0%
Poor-condition share: 48
public highway bridges: 1963
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.

Sherman County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Sherman County ranks #2 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Sherman County, Oregon contains 48 public highway bridges. Roughly 33.3% are rated “Good,” 66.7% “Fair,” and 0% “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 Sherman County

Good condition

33.3%

16 of 48 rated 7-9

Fair condition

66.7%

32 of 48 rated 5-6

Poor condition

0 of 48 rated 4 or below

In-state Poor-share rank

#2 of 36

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

Condition distribution

Share of 48 NBI-tracked bridges by lowest applicable component rating.

Good

33.3% (16)

Fair

66.7% (32)

Poor

0% (0)

89.6% of Sherman County's bridges have passed the 50-year mark

43 of the 48 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 33.3% 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.

1900s

1
1910s

1
1920s

2
1930s

3
1940s

1
1950s

7
1960s

23
1970s

5
2010s

3
2020s

2

What this shows Construction peaked in the 1960s, when 23 of the county's bridges still in the inventory were built, which is 47.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1963, 12 years older than the Oregon average of 1975.

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

The 5 Oregon counties nearest Sherman County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 1963 against a peer-group mean of 1976 is 13 years older.

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

Bridge inventory size and condition shares for Sherman County and the 5 Oregon counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Jefferson County	80	46.3%	46.3%	7.5%	1980
Crook County	79	46.8%	53.2%	0%	1980
Morrow County	70	45.7%	51.4%	2.9%	1975
Sherman County (this page)	48	33.3%	66.7%	0%	1963
Gilliam County	35	51.4%	48.6%	0%	1973
Wheeler County	32	43.8%	56.3%	0%	1974

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

Similar inventory size

Nearest county inventories outside OR (48 bridges here).

Wakulla County, FL · 48 bridges
Evans County, GA · 48 bridges
Owyhee County, ID · 48 bridges
Carter County, MO · 48 bridges

Similar average build year

Nearest mean year-built outside OR (1963 here).

Worcester County, MA · avg 1963 · 1,014 bridges
Honolulu County, HI · avg 1963 · 682 bridges
Chester County, PA · avg 1963 · 680 bridges
Essex County, NJ · avg 1963 · 505 bridges

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

All 48 Good 16 Fair 32 Poor 0

Fair-condition bridges (32)

Sort:

Sherman County Bridge Snapshot

Condition distribution

89.6% of Sherman County's bridges have passed the 50-year mark

How Sherman 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

Fair-condition bridges (32)

HWY 301

Mud Hollow Rd.

US 97 (HWY 042)

FRONTAGE RD HWY 02

I-84 (HWY 002)

BLAGG LANE

US 97 (HWY 042)

US 97 (HWY 042)

HWY 301

OR 206 (HWY 300)

E. 2nd Street

BLAGG ROAD

MUD HOLLOW RD

HAY CANYON ROAD

I-84 (HWY 002)

OR 206 (HWY 300)

OR 216 (HWY 290)

MONKLAND LANE

OR 206 (HWY 300)

MUD HOLLOW RD

US 97 (HWY 042)

LONE ROCK ROAD

I-84 (HWY 002) FR

HWY 301

HWY 301

I-84 (HWY 002) EB

I-84 (HWY 002) WB

HAY CANYON ROAD

US 97 (HWY 042)

US 97 (Hwy 042)

US 97 (HWY 042)

HENRICHS ROAD

Related