Total bridges
48
Public highway bridges in Sherman County
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.
Good condition
33.3%
16 of 48 rated 7-9
Fair condition
66.7%
32 of 48 rated 5-6
Poor condition
0%
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.
When Sherman County's bridges were built
48 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 1
1910–1919
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 7
1950–1959
7 bridges
- 1960s
1960–1969
23 bridges
- 1970s 5
1970–1979
5 bridges
- 2010s 3
2010–2019
3 bridges
- 2020s 2
2020–2029
2 bridges
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.
| 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.
Good-condition bridges (16)
I-84 (HWY 002) WB
GoodOver: SCOTT CANYON WEST
IN RUFUS, Sherman, OR
Built 1965 Load: 17.8 t ADT: 6,104
I-84 (HWY 002) EB
GoodOver: FULTON CANYON
159 MI E THE DALLES, Sherman, OR
Built 1964 Load: 19.8 t ADT: 6,354
I-84 (HWY 002) EB
GoodOver: SCOTT CANYON EAST
IN RUFUS, Sherman, OR
Built 1965 Load: 20.4 t ADT: 6,104
I-84 (HWY 002) EB
GoodOver: RUFUS CONN
IN RUFUS, Sherman, OR
Built 1965 Load: 21.7 t ADT: 6,104
I-84 (HWY 002) WB
GoodOver: FULTON CANYON
159 MI E THE DALLES, Sherman, OR
Built 1964 Load: 22.7 t ADT: 6,354
I-84 (HWY 002) WB
GoodOver: RUFUS CONN
IN RUFUS, Sherman, OR
Built 1965 Load: 26.2 t ADT: 6,104
US 97 (HWY 042)
GoodOver: SPANISH HOLLOW CREEK
061 MI S OF BIGG JCT, Sherman, OR
Built 1973 Load: 28.8 t ADT: 2,321
HWY 301
GoodOver: O-XING HWY 42(WASCO INT)
14.7 MI S. OF HWY 2 JCT, Sherman, OR
Built 1973 Load: 30.5 t ADT: 436
I-84 (HWY 002)
GoodOver: CONN RD
044 MI E RUFUS, Sherman, OR
Built 1963 Load: 31.8 t ADT: 12,129
RUTLEDGE ROAD
GoodOver: ROSEBUSH CREEK
3.2 MI E OF HWY 97, Sherman, OR
Built 2022 Load: 36.3 t ADT: 93
MOORE ST
GoodOver: BARNUM CANYON
MOORE ST IN MORO, Sherman, OR
Built 1900 Load: 39.5 t ADT: 74
FINNEGAN ROAD
GoodOver: FINNEGAN CREEK
3.6 MI E OF HWY 216, Sherman, OR
Built 2020 Load: 44.7 t ADT: 123
US 97 (HWY 042)
GoodOver: UPRR
AT BIGGS JCT, Sherman, OR
Built 2014 Load: 50.2 t ADT: 7,043
US 97 (HWY 042)
GoodOver: I-84 (HWY 002)
AT BIGGS JCT, Sherman, OR
Built 2014 Load: 55.4 t ADT: 7,043
US 97 (HWY 042)
GoodOver: SPANISH HOLLOW
004 MI S BIGGS JCT, Sherman, OR
Built 2019 Load: 66.1 t ADT: 2,796
I-84 (HWY 002)
GoodOver: HELMS CREEK
027 MI E RUFUS, Sherman, OR
Built 1964 Load: 69.0 t ADT: 12,129
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.