Total bridges
169
Public highway bridges in Dewey County
County profile · official public datasets
Dewey County, OK
169 public highway bridges tracked in the FHWA National Bridge Inventory: 86.4% rated Good, 13% Fair, 0.6% Poor.
- 169
- Public bridges
- 86.4%
- Good condition
- 0.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Dewey County pairs a top-5% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 5%
- lowest Poor share in state
- 0.6%
- Poor-condition share
- 169
- public highway bridges
- 1983
- 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.
Dewey County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Dewey County ranks #4 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.6%). Dewey County, Oklahoma contains 169 public highway bridges. Roughly 86.4% are rated “Good,” 13% “Fair,” and 0.6% “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
86.4%
146 of 169 rated 7-9
Fair condition
13%
22 of 169 rated 5-6
Poor condition
0.6%
1 of 169 rated 4 or below
In-state Poor-share rank
#4 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 169 NBI-tracked bridges by lowest applicable component rating.
Good 86.4% (146)
Fair 13% (22)
Poor 0.6% (1)
Dewey County's Poor-condition bridges carry 24 vehicle crossings a day
That is 0% of the county's reported daily bridge traffic on 0.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 24 crossings a day against 321 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 169 of 169 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
30.8% of Dewey County's bridges have passed the 50-year mark
52 of the 169 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 86.4% 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 100% of the county's Poor-condition bridge traffic
D0668 over GYP CREEK, built 1940, carries 24 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 1-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 24 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Dewey County's bridges were built
169 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1930s
1930–1939
22 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 11
1950–1959
11 bridges
- 1960s 7
1960–1969
7 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s
1980–1989
32 bridges
- 1990s
1990–1999
28 bridges
- 2000s
2000–2009
28 bridges
- 2010s
2010–2019
19 bridges
- 2020s 8
2020–2029
8 bridges
What this shows Construction peaked in the 1980s, when 32 of the county's bridges still in the inventory were built, which is 18.9% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1983, 6 years newer than the Oklahoma average of 1977.
How Dewey County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Dewey County in number of bridges, with their condition splits. Its 0.6% Poor share is the 1st-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1974 is 9 years newer.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Craig County | 180 | 33.3% | 47.2% | 19.4% | 1970 |
| Pawnee County | 174 | 46.6% | 34.5% | 19% | 1975 |
| Dewey County (this page) | 169 | 86.4% | 13% | 0.6% | 1983 |
| Woodward County | 168 | 36.3% | 59.5% | 4.2% | 1980 |
| Delaware County | 160 | 34.4% | 47.5% | 18.1% | 1975 |
| Haskell County | 155 | 36.8% | 56.8% | 6.5% | 1972 |
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 Dewey 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 Dewey County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (169 bridges here).
- Pike County, AL · 169 bridges
- Laurens County, GA · 169 bridges
- Cumberland County, IL · 169 bridges
- Union County, IA · 169 bridges
Similar average build year
Nearest mean year-built outside OK (1983 here).
- Dallas County, TX · avg 1983 · 3,230 bridges
- Bexar County, TX · avg 1983 · 2,342 bridges
- Sedgwick County, KS · avg 1983 · 1,333 bridges
- Will County, IL · avg 1983 · 649 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (169)
2228C
GoodOver: CREEK
4.4 W 0.2 N OF VICI, Dewey, OK
Built 1992 Load: 45.4 t ADT: 25
E0620
GoodOver: CAMP CREEK
8.1 W 2.0 S OF SEILING, Dewey, OK
Built 1995 Load: 46.3 t ADT: 24
E0750
GoodOver: CREEK
4. N 2.8 E OF LEEDY, Dewey, OK
Built 1960 Load: 48.1 t ADT: 25
FAS 2222
GoodOver: FIDDLERS CREEK
8. E 3.1 N PUTNAM, Dewey, OK
Built 1983 Load: 48.1 t ADT: 50
E0820
GoodOver: CREEK
2S; 1.2E OF PUTNAM, Dewey, OK
Built 2011 Load: 48.1 t ADT: 25
S.H. 34
GoodOver: S. CANADIAN RIVER
13.5 N CUSTER C/L, Dewey, OK
Built 2022 Load: 52.3 t ADT: 1,100
E0630
GoodOver: CAMP CREEK
8.3 W 3.0 S OF SEILING, Dewey, OK
Built 1994 Load: 52.6 t ADT: 24
E0590
GoodOver: KIZER CREEK
9.1 E & 1.0 N OF VICI, Dewey, OK
Built 2003 Load: 54.4 t ADT: 25
N2150
GoodOver: KIZER CREEK
7E 4.3S OF VICI, Dewey, OK
Built 2021 Load: 55.3 t ADT: 24
S.H. 34
GoodOver: CREEK
8.2 MI N CUSTER C/L, Dewey, OK
Built 1932 Load: 59.1 t ADT: 970
S.H. 34
GoodOver: CREEK
10.7 MI N CUSTER C/L, Dewey, OK
Built 1952 Load: 61.6 t ADT: 970
S.H. 47
GoodOver: CREEK
19.0 MI E JCT S.H. 34, Dewey, OK
Built 1956 Load: 66.3 t ADT: 390
U.S. 183
GoodOver: CREEK
17.4 N OF CUSTER C/L, Dewey, OK
Built 2019 Load: 77.3 t ADT: 2,016
S.H. 47
GoodOver: CREEK
3.4 MI E JCT S.H. 34, Dewey, OK
Built 1956 Load: 81.8 t ADT: 590
U.S. 270
GoodOver: CREEK
0.1 MI NW JCT U.S. 281, Dewey, OK
Built 1933 Load: 88.2 t ADT: 3,100
S.H. 34
GoodOver: CREEK
13.1 MI N CUSTER C/L, Dewey, OK
Built 1954 Load: 90.7 t ADT: 1,100
S.H. 47
GoodOver: CREEK
18.6 MI E JCT S.H. 34, Dewey, OK
Built 1956 Load: 90.7 t ADT: 390
S.H. 47
GoodOver: CREEK
0.6 MI E JCT S.H. 34, Dewey, OK
Built 1956 Load: 90.7 t ADT: 590
D0668
PoorOver: GYP CREEK
2.2 W 2. N OF CAMARGO, Dewey, OK
Built 1940 Load: 0.0 t ADT: 24
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.