Total bridges
387
Public highway bridges in Alfalfa County
County profile · official public datasets
Alfalfa County, OK
387 public highway bridges tracked in the FHWA National Bridge Inventory: 27.4% rated Good, 66.1% Fair, 6.5% Poor.
- 387
- Public bridges
- 27.4%
- Good condition
- 6.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Alfalfa County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 40th
- of 77 on Poor share
- 6.5%
- Poor-condition share
- 387
- public highway bridges
- 1988
- 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.
Alfalfa County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Alfalfa County ranks #40 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.5%). Alfalfa County, Oklahoma contains 387 public highway bridges. Roughly 27.4% are rated “Good,” 66.1% “Fair,” and 6.5% “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
27.4%
106 of 387 rated 7-9
Fair condition
66.1%
256 of 387 rated 5-6
Poor condition
6.5%
25 of 387 rated 4 or below
In-state Poor-share rank
#40 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 387 NBI-tracked bridges by lowest applicable component rating.
Good 27.4% (106)
Fair 66.1% (256)
Poor 6.5% (25)
Alfalfa County's Poor-condition bridges carry 1,949 vehicle crossings a day
That is 1.4% of the county's reported daily bridge traffic on 6.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 78 crossings a day against 641 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 387 of 387 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
31.3% of Alfalfa County's bridges have passed the 50-year mark
121 of the 387 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 27.4% 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 6.2% of the county's Poor-condition bridge traffic
E0210 (0218C) over EAST CLAY CREEK, built 1999, carries 120 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 25-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,949 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Alfalfa County's bridges were built
387 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 7
1920–1929
7 bridges
- 1930s 35
1930–1939
35 bridges
- 1940s 15
1940–1949
15 bridges
- 1950s 40
1950–1959
40 bridges
- 1960s 19
1960–1969
19 bridges
- 1970s 6
1970–1979
6 bridges
- 1980s 22
1980–1989
22 bridges
- 1990s 34
1990–1999
34 bridges
- 2000s
2000–2009
86 bridges
- 2010s
2010–2019
109 bridges
- 2020s 13
2020–2029
13 bridges
What this shows Construction peaked in the 2010s, when 109 of the county's bridges still in the inventory were built, which is 28.2% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year is 1988, 11 years newer than the Oklahoma average of 1977.
How Alfalfa County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Alfalfa County in number of bridges, with their condition splits. Its 6.5% Poor share is the 3rd-lowest of these 6. Its average build year of 1988 against a peer-group mean of 1978 is 10 years newer.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Muskogee County | 398 | 37.7% | 52.3% | 10.1% | 1971 |
| Creek County | 395 | 40.5% | 38.7% | 20.8% | 1972 |
| Alfalfa County (this page) | 387 | 27.4% | 66.1% | 6.5% | 1988 |
| Custer County | 384 | 73.2% | 25.5% | 1.3% | 1982 |
| Payne County | 384 | 24% | 65.6% | 10.4% | 1982 |
| Stephens County | 382 | 29.1% | 68.1% | 2.9% | 1985 |
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 Alfalfa 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 Alfalfa County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (387 bridges here).
- Delaware County, PA · 387 bridges
- Calhoun County, AL · 386 bridges
- Stanislaus County, CA · 386 bridges
- Gibson County, TN · 386 bridges
Similar average build year
Nearest mean year-built outside OK (1988 here).
- Travis County, TX · avg 1988 · 1,544 bridges
- Loudoun County, VA · avg 1988 · 442 bridges
- Licking County, OH · avg 1988 · 439 bridges
- Vernon County, MO · avg 1988 · 401 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (387)
N2530
FairOver: CREEK
8W .4S OF CHEROKEE, Alfalfa, OK
Built 1938 Load: 0.0 t ADT: 100
E0360
FairOver: CREEK
2.9W 1S OF ALINE, Alfalfa, OK
Built 1945 Load: 0.0 t ADT: 100
E0240
FairOver: CLAY CREEK TRIB.
1S .2W OF YEWED, Alfalfa, OK
Built 1949 Load: 0.0 t ADT: 25
N2520
FairOver: SALT FORK TRIB.
9W OF CHEROKEE .3S OF 64, Alfalfa, OK
Built 1950 Load: 0.0 t ADT: 25
N2614 (N. PENN)
FairOver: COTTONWOOD CREEK
.2E SH64 .3N WASHINGTON, Alfalfa, OK
Built 1965 Load: 0.0 t ADT: 25
E0210
FairOver: CREEK
2N .3W OF YEWED, Alfalfa, OK
Built 1938 Load: 2.7 t ADT: 25
N2720
FairOver: TURKEY CREEK
3.1S OF GOLTRY 1W OF SH45, Alfalfa, OK
Built 1967 Load: 5.4 t ADT: 100
E0230
FairOver: EAGLE CHIEF CREEK TRIB.
5.6W OF LAMBERT, Alfalfa, OK
Built 1955 Load: 9.1 t ADT: 100
E0220
FairOver: CREEK
5.6W 1N OF YEWED, Alfalfa, OK
Built 1955 Load: 10.0 t ADT: 100
N2640
FairOver: CREEK
7W .6S OF JET, Alfalfa, OK
Built 1950 Load: 10.9 t ADT: 100
N2590
FairOver: WEST CLAY CREEK
2E .1S OF SH45/SH8, Alfalfa, OK
Built 1995 Load: 11.8 t ADT: 100
N2520
FairOver: SALT FORK TRIB.
7W 1.3S OF INGERSOLL, Alfalfa, OK
Built 1940 Load: 11.8 t ADT: 100
E0230
FairOver: EAGLE CHIEF CREEK
6W OF LAMBERT, Alfalfa, OK
Built 1955 Load: 11.8 t ADT: 100
N2540
FairOver: CREEK
1W .9S OF CARMEN, Alfalfa, OK
Built 2001 Load: 11.8 t ADT: 100
E0270
FairOver: CREEK
3N 2.6W OF CARMEN, Alfalfa, OK
Built 1956 Load: 12.2 t ADT: 100
N2580
FairOver: WEST CLAY CREEK TRIB.
.5E .5S OF LAMBERT, Alfalfa, OK
Built 1937 Load: 12.7 t ADT: 25
E0270
FairOver: CREEK
3S 1.2E OF JET, Alfalfa, OK
Built 2000 Load: 12.7 t ADT: 100
E0290
FairOver: CREEK
5S; .9E OF US64/SH8, Alfalfa, OK
Built 2010 Load: 12.7 t ADT: 100
N2740
FairOver: WAGON CREEK
3E 1.2N OF JET, Alfalfa, OK
Built 1911 Load: 13.6 t ADT: 100
N2610 (FAS 0204)
FairOver: CREEK
1E OF SH8, Alfalfa, OK
Built 1936 Load: 13.6 t ADT: 100
N2520
FairOver: SALT FORK TRIB.
9W OF CHEROKEE .6S US64, Alfalfa, OK
Built 1938 Load: 13.6 t ADT: 100
N2640 (0246C)
FairOver: CREEK
3E 1.9N OF US64/SH8, Alfalfa, OK
Built 1965 Load: 13.6 t ADT: 100
N2600
FairOver: STINK CREEK
1W .5S OF JCT SH8/SH58, Alfalfa, OK
Built 1993 Load: 13.6 t ADT: 100
E0300 (FAS 0212)
FairOver: EAST CLAY CREEK
3N .7W OF SH45/SH8, Alfalfa, OK
Built 1932 Load: 14.5 t ADT: 25
N2550
FairOver: CREEK
6W .1N OF CHEROKEE, Alfalfa, OK
Built 1939 Load: 14.5 t ADT: 50
E0090
FairOver: STINK CREEK
MI WEST OF SH-58, Alfalfa, OK
Built 1990 Load: 14.5 t ADT: 100
E0260
FairOver: WAGON CREEK
2S 1.9E OF JET, Alfalfa, OK
Built 1957 Load: 14.9 t ADT: 100
E0030
FairOver: STINK CREEK
5N .9E OF SH 8/11 JCT., Alfalfa, OK
Built 1937 Load: 15.4 t ADT: 100
N2710 (FAS 0205)
FairOver: CREEK
4.0 MI N SH 45, Alfalfa, OK
Built 1961 Load: 15.4 t ADT: 100
N2620
FairOver: CREEK
4E 3.9N OF YEWED, Alfalfa, OK
Built 2000 Load: 15.4 t ADT: 100
FAS 0216
FairOver: BIG SANDY CREEK TRIB.
10.5E OF S.H. 11, Alfalfa, OK
Built 2005 Load: 15.4 t ADT: 40
E0260
FairOver: SPRING CREEK
2S 4.7W OF JET, Alfalfa, OK
Built 2001 Load: 16.3 t ADT: 100
E0290
FairOver: CREEK
1N .9W OF CARMEN, Alfalfa, OK
Built 1938 Load: 17.2 t ADT: 100
N2650
FairOver: CREEK
.9S OF BYRON, Alfalfa, OK
Built 1939 Load: 17.2 t ADT: 100
N2560
FairOver: CREEK
_, Alfalfa, OK
Built 2005 Load: 17.2 t ADT: 100
N2650
FairOver: CREEK
4.3S 1W OF HELENA, Alfalfa, OK
Built 2011 Load: 17.2 t ADT: 100
E0240
FairOver: CREEK
2W OF SH 8, Alfalfa, OK
Built 1949 Load: 18.1 t ADT: 100
E0210 (0218C)
FairOver: WEST CLAY CREEK
3N 1.4E OF US 64, Alfalfa, OK
Built 1955 Load: 18.1 t ADT: 100
E0300
FairOver: WAGON CREEK
3N .8E OF GOLTRY, Alfalfa, OK
Built 1958 Load: 18.1 t ADT: 100
E0280 (0224C)
FairOver: WAGON CREEK
4S 1.4E OF JET, Alfalfa, OK
Built 1975 Load: 18.1 t ADT: 100
E0140
FairOver: CREEK
7.6W 1N OF INGERSOLL, Alfalfa, OK
Built 2002 Load: 18.1 t ADT: 100
FAS 0211
FairOver: TURKEY CREEK TRIB.
2.1E OF S.H. 58, Alfalfa, OK
Built 2004 Load: 18.1 t ADT: 100
N2590
FairOver: COTTONWOOD CREEK TRIB.
2W 1.2N OF CHEROKEE, Alfalfa, OK
Built 1921 Load: 19.1 t ADT: 75
E0260
FairOver: CREEK
4W 2S OF JET, Alfalfa, OK
Built 1935 Load: 19.1 t ADT: 25
E0270
FairOver: CREEK
3S .5E OF US64/SH8, Alfalfa, OK
Built 1936 Load: 19.1 t ADT: 100
N2580
FairOver: WEST CLAY CREEK TRIB.
3E 1.8N OF CARMEN, Alfalfa, OK
Built 1937 Load: 19.1 t ADT: 100
E0300 (FAS 0212)
FairOver: CREEK
3N 1.8E OF SH45/SH8, Alfalfa, OK
Built 1937 Load: 19.1 t ADT: 25
E0360
FairOver: TURKEY CREEK TRIB.
3S 3.9E OF HELENA, Alfalfa, OK
Built 1955 Load: 19.1 t ADT: 24
E0040
FairOver: BARROW DRAIN
4N .1W OF SH 8/11 JCT., Alfalfa, OK
Built 1962 Load: 19.1 t ADT: 100
E0230 (FAS 0213)
FairOver: CREEK
1.2W OF LAMBERT, Alfalfa, OK
Built 1962 Load: 19.1 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.