Total bridges
160
Public highway bridges in Delaware County
County profile · official public datasets
Delaware County, OK
160 public highway bridges tracked in the FHWA National Bridge Inventory: 34.4% rated Good, 47.5% Fair, 18.1% Poor.
- 160
- Public bridges
- 34.4%
- Good condition
- 18.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Delaware County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 71st
- of 77 on Poor share
- 18.1%
- Poor-condition share
- 160
- 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.
Delaware County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Delaware County ranks #71 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 18.1%). Delaware County, Oklahoma contains 160 public highway bridges. Roughly 34.4% are rated “Good,” 47.5% “Fair,” and 18.1% “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
34.4%
55 of 160 rated 7-9
Fair condition
47.5%
76 of 160 rated 5-6
Poor condition
18.1%
29 of 160 rated 4 or below
In-state Poor-share rank
#71 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 160 NBI-tracked bridges by lowest applicable component rating.
Good 34.4% (55)
Fair 47.5% (76)
Poor 18.1% (29)
Delaware County's Poor-condition bridges carry 5,922 vehicle crossings a day
That is 2.3% of the county's reported daily bridge traffic on 18.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 204 crossings a day against 2,571 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 160 of 160 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
45% of Delaware County's bridges have passed the 50-year mark
72 of the 160 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 34.4% 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 28.1% of the county's Poor-condition bridge traffic
E0250 over GRAND LAKE-HICKORY CREEK, built 1940, carries 1,664 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 29-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 5,922 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Delaware County's bridges were built
160 bridges with a recorded construction year, grouped by decade
- 1920s 3
1920–1929
3 bridges
- 1930s
1930–1939
33 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 13
1950–1959
13 bridges
- 1960s 13
1960–1969
13 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s 12
1980–1989
12 bridges
- 1990s
1990–1999
37 bridges
- 2000s 14
2000–2009
14 bridges
- 2010s
2010–2019
17 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1990s, when 37 of the county's bridges still in the inventory were built, which is 23.1% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1975) matches the Oklahoma average (1977).
How Delaware County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Delaware County in number of bridges, with their condition splits. Its 18.1% Poor share is the 6th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1977 is in line with the group.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Woodward County | 168 | 36.3% | 59.5% | 4.2% | 1980 |
| Delaware County (this page) | 160 | 34.4% | 47.5% | 18.1% | 1975 |
| Haskell County | 155 | 36.8% | 56.8% | 6.5% | 1972 |
| Johnston County | 154 | 40.3% | 55.8% | 3.9% | 1976 |
| Roger Mills County | 153 | 92.2% | 7.8% | 0% | 1982 |
| Ellis County | 152 | 40.1% | 59.9% | 0% | 1975 |
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 Delaware 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 Delaware County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (160 bridges here).
- Clay County, KY · 160 bridges
- Kittson County, MN · 160 bridges
- Rio Arriba County, NM · 160 bridges
- Warren County, TN · 160 bridges
Similar average build year
Nearest mean year-built outside OK (1975 here).
- San Bernardino County, CA · avg 1975 · 1,422 bridges
- Lane County, OR · avg 1975 · 1,010 bridges
- Fulton County, GA · avg 1975 · 775 bridges
- Westmoreland County, PA · avg 1975 · 620 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (76)
N4700
FairOver: CREEK
5.0 MI NE OF COLCORD, Delaware, OK
Built 1960 Load: 33.3 t ADT: 100
N4510
FairOver: SPAVINAW CREEK
4.6N; 3.9E OF COLCORD, Delaware, OK
Built 2012 Load: 33.6 t ADT: 100
N4730
FairOver: SAGER CREEK
2. NE WEST SILOAM SPRI, Delaware, OK
Built 1987 Load: 33.8 t ADT: 100
N4640
FairOver: WHITEWATER CREEK
6NE OF JAY, Delaware, OK
Built 1989 Load: 34.2 t ADT: 100
E0428 (D0430)
FairOver: BEATY CREEK
10SE OF JAY, Delaware, OK
Built 1996 Load: 34.2 t ADT: 320
2154C
FairOver: CALUNCHETY HOLLOW CREEK
5.0 MI SE OF COLCORD, Delaware, OK
Built 1939 Load: 34.5 t ADT: 100
FAS 2131
FairOver: SALINE CREEK
.5 MILE E. OF KENWOOD, Delaware, OK
Built 1987 Load: 34.7 t ADT: 100
N4690 (2166C)
FairOver: HONEY CREEK
7.5SE OF GROVE, Delaware, OK
Built 2003 Load: 37.1 t ADT: 200
D0458
FairOver: BEATY CREEK
7SE OF JAY, Delaware, OK
Built 2014 Load: 37.2 t ADT: 100
U.S. 59
FairOver: DROWNING CREEK
6.3 MI N SH20, Delaware, OK
Built 1973 Load: 37.3 t ADT: 7,600
E0479 (2140C)
FairOver: CHEROKEE CREEK
5.5NE OF COLCORD, Delaware, OK
Built 1982 Load: 37.6 t ADT: 100
N4660
FairOver: CREEK
1.7S OF HWY 25, Delaware, OK
Built 2009 Load: 39.1 t ADT: 100
U.S. 59
FairOver: FLINT CREEK
9.1 MI NW ADAIR CO, Delaware, OK
Built 1991 Load: 40.8 t ADT: 6,100
U.S. 59
FairOver: FLINT CREEK
9.1 MI NW ADAIR CO, Delaware, OK
Built 1991 Load: 40.8 t ADT: 5,900
U.S. 412 ALT.
FairOver: CHEROKEE TP UNDER
12.5 MI W OF STATE LINE, Delaware, OK
Built 1991 Load: 43.1 t ADT: 3,900
E0441 (2130C)
FairOver: SPAVINAW CREEK
10SW OF JAY, Delaware, OK
Built 2001 Load: 43.4 t ADT: 100
N4520
FairOver: FLY CREEK
2 NW OF BERNICE, Delaware, OK
Built 2017 Load: 43.5 t ADT: 100
U.S. 59
FairOver: HONEY CREEK
12.4 MI N SH20, Delaware, OK
Built 2002 Load: 46.3 t ADT: 7,300
2146C
FairOver: CLOUD CREEK
5.0 MI NW COLCORD, Delaware, OK
Built 1985 Load: 48.4 t ADT: 100
N4690 (2166C)
FairOver: CAVE SPRINGS TRIB.
6.5SE OF GROVE, Delaware, OK
Built 1930 Load: 53.9 t ADT: 100
N4700
FairOver: HOG EYE CREEK
4.3S OF S.H. 20, Delaware, OK
Built 2011 Load: 54.5 t ADT: 100
S.H. 20
FairOver: CREEK
1.2 MI E US59, Delaware, OK
Built 1955 Load: 55.7 t ADT: 2,300
D0378
FairOver: CREEK
1.5W OF S.H. 127, Delaware, OK
Built 2012 Load: 78.4 t ADT: 100
E0330 (2116C)
FairOver: CREEK
5.5SE OF GROVE, Delaware, OK
Built 2001 Load: 82.6 t ADT: 150
N4580
FairOver: CREEK
2N OF TWIN OAKS, Delaware, OK
Built 2012 Load: 99.8 t ADT: 100
E0280 (2110C)
FairOver: CARR CREEK
8NE OF GROVE, Delaware, OK
Built 2012 Load: 99.9 t ADT: 350
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.