Total bridges
284
Public highway bridges in Logan County
County profile · official public datasets
Logan County, OK
284 public highway bridges tracked in the FHWA National Bridge Inventory: 24.3% rated Good, 55.6% Fair, 20.1% Poor.
- 284
- Public bridges
- 24.3%
- Good condition
- 20.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Logan County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 75th
- of 77 on Poor share
- 20.1%
- Poor-condition share
- 284
- public highway bridges
- 1973
- 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.
Logan County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Logan County ranks #75 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 20.1%). Logan County, Oklahoma contains 284 public highway bridges. Roughly 24.3% are rated “Good,” 55.6% “Fair,” and 20.1% “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
24.3%
69 of 284 rated 7-9
Fair condition
55.6%
158 of 284 rated 5-6
Poor condition
20.1%
57 of 284 rated 4 or below
In-state Poor-share rank
#75 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 284 NBI-tracked bridges by lowest applicable component rating.
Good 24.3% (69)
Fair 55.6% (158)
Poor 20.1% (57)
Logan County's Poor-condition bridges carry 5,291 vehicle crossings a day
That is 1.2% of the county's reported daily bridge traffic on 20.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 93 crossings a day against 1,824 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 284 of 284 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
49.3% of Logan County's bridges have passed the 50-year mark
140 of the 284 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 24.3% 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.
One structure carries 9.5% of the county's Poor-condition bridge traffic
E0740 (OLD S.H. 33 over FITZGERALD CREEK, built 1927, carries 500 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 57-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 5,291 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Logan County's bridges were built
284 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 5
1910–1919
5 bridges
- 1920s 15
1920–1929
15 bridges
- 1930s
1930–1939
23 bridges
- 1940s
1940–1949
32 bridges
- 1950s
1950–1959
53 bridges
- 1960s 9
1960–1969
9 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s 20
1980–1989
20 bridges
- 1990s
1990–1999
43 bridges
- 2000s
2000–2009
42 bridges
- 2010s
2010–2019
28 bridges
- 2020s 9
2020–2029
9 bridges
What this shows Construction peaked in the 1950s, when 53 of the county's bridges still in the inventory were built, which is 18.7% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year (1973) matches the Oklahoma average (1977).
How Logan County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Logan County in number of bridges, with their condition splits. Its 20.1% Poor share is the 6th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1971 is in line with the group.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Jackson County | 292 | 58.6% | 39% | 2.4% | 1964 |
| Bryan County | 286 | 41.6% | 48.6% | 9.8% | 1974 |
| Tillman County | 284 | 69.4% | 28.2% | 2.5% | 1962 |
| Logan County (this page) | 284 | 24.3% | 55.6% | 20.1% | 1973 |
| Blaine County | 272 | 66.9% | 26.1% | 7% | 1976 |
| Rogers County | 272 | 44.9% | 46% | 9.2% | 1978 |
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 Logan 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 Logan County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (284 bridges here).
- Cambria County, PA · 284 bridges
- Susquehanna County, PA · 284 bridges
- Washington County, TN · 284 bridges
- Gonzales County, TX · 284 bridges
Similar average build year
Nearest mean year-built outside OK (1973 here).
- Jefferson County, AL · avg 1973 · 1,068 bridges
- Erie County, NY · avg 1973 · 906 bridges
- Davidson County, TN · avg 1973 · 832 bridges
- Lancaster County, PA · avg 1973 · 801 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (158)
E0750
FairOver: CREEK
2S 2.4E OF COYLE, Logan, OK
Built 2009 Load: 32.7 t ADT: 90
E0795
FairOver: CREEK
1S .6E OF I-35 & SH 33, Logan, OK
Built 2009 Load: 32.7 t ADT: 120
E0750
FairOver: SOLDIER CREEK
1.2S 1.3E OF LANGSTON, Logan, OK
Built 2009 Load: 32.7 t ADT: 105
E0810
FairOver: CREEK
3.6W OF MERIDIAN, Logan, OK
Built 2001 Load: 33.6 t ADT: 90
BATTLE AVE.
FairOver: BIRD CREEK
1 BLK N JCT SH33 BATTLE A, Logan, OK
Built 1998 Load: 34.3 t ADT: 150
E0870
FairOver: DEER CREEK
.1E 3S OF NAVINA, Logan, OK
Built 1975 Load: 34.4 t ADT: 100
S.H. 74
FairOver: COTTONWOOD CREEK
3.4 MI N OKLA. C/L, Logan, OK
Built 1947 Load: 34.5 t ADT: 5,400
LUTHER RD.
FairOver: OPOSSUM CREEK
.3N OF OKLA CO. LINE, Logan, OK
Built 2011 Load: 34.5 t ADT: 100
E0810
FairOver: CREEK
.3E MIDWEST BLVD, Logan, OK
Built 1993 Load: 34.5 t ADT: 100
N3280
FairOver: CREEK
15E 2.8N OF GUTHRIE, Logan, OK
Built 1999 Load: 34.5 t ADT: 24
E0600
FairOver: WEST BEAVER CREEK
.2S 5W OF ORLANDO, Logan, OK
Built 2016 Load: 34.5 t ADT: 100
E0730
FairOver: CREEK
5.5 N 4.9 E OF I-35/SH33, Logan, OK
Built 1993 Load: 36.3 t ADT: 100
E0840
FairOver: CREEK
.9W OF SEWARD, Logan, OK
Built 1997 Load: 36.3 t ADT: 150
E0760
FairOver: CREEK
13E 3N .1W OF GUTHRIE, Logan, OK
Built 2000 Load: 36.3 t ADT: 50
U.S. 77 RAMP W-N
FairOver: I-35 UNDER
I-35/US 77 JCT., Logan, OK
Built 2001 Load: 37.2 t ADT: 13,600
E0760
FairOver: CREEK
3N 6.2 E OF SH74/SH33, Logan, OK
Built 1995 Load: 37.7 t ADT: 100
E0760
FairOver: CREEK
2.5N 1E OF SH33 & I-35, Logan, OK
Built 1998 Load: 38.1 t ADT: 50
E0800
FairOver: COTTONWOOD CREEK
1.7S 1.3W US 77/SH33, Logan, OK
Built 1987 Load: 38.9 t ADT: 200
N3150
FairOver: CREEK
1E .8S OF MULHALL, Logan, OK
Built 1987 Load: 39.4 t ADT: 100
E0710
FairOver: ANTELOPE CREEK
.3S 1.7W OF PLEASANT VALY, Logan, OK
Built 1986 Load: 39.9 t ADT: 100
N3290
FairOver: WALNUT CREEK
.1W 5.N OF MERRICK, Logan, OK
Built 1991 Load: 39.9 t ADT: 250
N3070
FairOver: CREEK
1.6E .4S OF NAVINA, Logan, OK
Built 1997 Load: 40.3 t ADT: 50
E0860
FairOver: SPRING CREEK
.2W 2S OF SEWARD, Logan, OK
Built 2014 Load: 40.6 t ADT: 100
E0780
FairOver: CREEK
3.8S 2.5W 1S .2W CRESCENT, Logan, OK
Built 1990 Load: 40.8 t ADT: 25
E0690
FairOver: SHAWNEE CREEK TRIB.
.4W 4.2N of CRESCENT, Logan, OK
Built 2018 Load: 40.8 t ADT: 100
INDIAN MERIDIAN
FairOver: CREEK
3.6S OF MERIDIAN, Logan, OK
Built 1940 Load: 42.6 t ADT: 100
N3180
FairOver: CREEK
5W 1.6S OF MERIDIAN, Logan, OK
Built 1996 Load: 42.6 t ADT: 50
N3070
FairOver: SKELETON CREEK
3E 4.7S OF SH74/SH51, Logan, OK
Built 1985 Load: 43.4 t ADT: 100
E0600
FairOver: MIDDLE BEAVER CREEK
3.0 MI W OF ORLANDO, Logan, OK
Built 1991 Load: 43.4 t ADT: 50
N3010
FairOver: ROCK CREEK
.3W 1.7S OF LOVELL, Logan, OK
Built 1998 Load: 43.4 t ADT: 75
N3070
FairOver: WOLF CREEK
.2N 3.5E 3.2N OF CRESCENT, Logan, OK
Built 2002 Load: 43.4 t ADT: 50
N3080
FairOver: WOLF CREEK
4E 6.8S OF SH74/SH51, Logan, OK
Built 1987 Load: 44.4 t ADT: 100
N3190
FairOver: FRITZGERALD CREEK
3.W 1.4S OF LANGSTON, Logan, OK
Built 1994 Load: 44.5 t ADT: 100
U.S. 77
FairOver: CREEK
1.6 MI N JCT I-35, Logan, OK
Built 1994 Load: 45.4 t ADT: 11,200
N3020
FairOver: ROCK CREEK
.7E .5S OF LOVELL, Logan, OK
Built 1982 Load: 45.4 t ADT: 25
I-35
FairOver: ROLLER COASTER RD. UNDER
7.1 MI N OKLA. C/L, Logan, OK
Built 1998 Load: 45.4 t ADT: 16,900
I-35
FairOver: ROLLER COASTER RD. UNDER
7.1 MI N OKLA. C/L, Logan, OK
Built 1998 Load: 45.4 t ADT: 12,800
E0830
FairOver: CREEK
3.1S 4E 1N .3E MERIDIAN, Logan, OK
Built 1998 Load: 48.1 t ADT: 50
E0760
FairOver: CREEK
3N .3W OF SH33/SH74, Logan, OK
Built 2001 Load: 48.1 t ADT: 100
S.H. 33
FairOver: CIMARRON RIVER
13.4 E OF US 77 JCT, Logan, OK
Built 2005 Load: 49.9 t ADT: 3,900
E0720
FairOver: CREEK
1.5N 7.5E OF CRESENT, Logan, OK
Built 2011 Load: 49.9 t ADT: 100
E0660
FairOver: BRIDGE CREEK
.5S 5.7W OF MULHALL, Logan, OK
Built 1997 Load: 50.8 t ADT: 25
E0760
FairOver: PIN CREEK
1S .2E OF SH74C/SH77, Logan, OK
Built 1995 Load: 51.3 t ADT: 250
E0850
FairOver: CREEK
1S 1.3E BRDWY & SEWARD, Logan, OK
Built 1995 Load: 51.7 t ADT: 100
E0700
FairOver: CREEK
8S 2.5E OF SH51/SH74, Logan, OK
Built 2001 Load: 52.8 t ADT: 100
I-35
FairOver: CREEK
7 MI N OKLA. C/L, Logan, OK
Built 1959 Load: 55.7 t ADT: 33,500
N3150
FairOver: CREEK
1.5E 1.5N OF I-35/SEWARD, Logan, OK
Built 2004 Load: 56.2 t ADT: 100
E0810
FairOver: CREEK
2S .6W OF SH33/SH74, Logan, OK
Built 1990 Load: 56.3 t ADT: 100
E0660
FairOver: CREEK
.5S .4 N OF MULHALL, Logan, OK
Built 1980 Load: 58.1 t ADT: 100
E0820
FairOver: PAWNEE CREEK
3S 2.2W OF SH33/SH74, Logan, OK
Built 1990 Load: 59.1 t ADT: 100
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.