County profile · official public datasets

Carter County, OK

339 public highway bridges tracked in the FHWA National Bridge Inventory: 36% rated Good, 59.3% Fair, 4.7% Poor.

339
Public bridges
36%
Good condition
4.7%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Carter County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 38%
lowest Poor share in state
4.7%
Poor-condition share
339
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.

Carter County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Carter County ranks #29 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.7%). Carter County, Oklahoma contains 339 public highway bridges. Roughly 36% are rated “Good,” 59.3% “Fair,” and 4.7% “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.

Total bridges

339

Public highway bridges in Carter County

Good condition

36%

122 of 339 rated 7-9

Fair condition

59.3%

201 of 339 rated 5-6

Poor condition

4.7%

16 of 339 rated 4 or below

In-state Poor-share rank

#29 of 77

Among Oklahoma counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 339 NBI-tracked bridges by lowest applicable component rating.

Good
36% (122)
Fair
59.3% (201)
Poor
4.7% (16)

Carter County's Poor-condition bridges carry 3,094 vehicle crossings a day

That is 0.3% of the county's reported daily bridge traffic on 4.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 193 crossings a day against 3,788 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 339 of 339 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.3% of Carter County's bridges have passed the 50-year mark

113 of the 339 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 36% 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 34.3% of the county's Poor-condition bridge traffic

1054C over CREEK, built 1941, carries 1,062 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 16-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 3,094 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Carter County's bridges were built

339 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2000s, when 78 of the county's bridges still in the inventory were built, which is 23% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1983, 6 years newer than the Oklahoma average of 1977.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Carter County compares with Oklahoma's closest counties by inventory size

The 5 Oklahoma counties nearest Carter County in number of bridges, with their condition splits. Its 4.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1976 is 7 years newer.

Showing the 5 closest of 76 Oklahoma counties eligible for comparison.

Bridge inventory size and condition shares for Carter County and the 5 Oklahoma counties closest to it in inventory size
County Bridges Poor
Osage County 366 19.9%
Washita County 361 3.6%
Noble County 342 3.5%
Carter County (this page) 339 4.7%
Garvin County 330 10.9%
Cleveland County 316 5.1%

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 Carter 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 Carter County, both outside Oklahoma so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OK (339 bridges here).

Similar average build year

Nearest mean year-built outside OK (1983 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 339 Good 122 Fair 201 Poor 16

Good-condition bridges (122)

N3150

Good

Over: WALNUT CREEK

1.7E 2N of JCT US70/SH76, Carter, OK

Built 2019 Load: 33.6 t ADT: 200

U.S. 177

Good

Over: CREEK

2.2 MI N JCT SH199, Carter, OK

Built 1951 Load: 34.1 t ADT: 1,900

S.H. 76

Good

Over: CREEK

3.2 MI N JCT SH 7, Carter, OK

Built 1954 Load: 34.2 t ADT: 1,700

S.H. 53

Good

Over: CREEK

0.4 MI E JCT SH76, Carter, OK

Built 1955 Load: 34.3 t ADT: 1,400

U.S. 177

Good

Over: KEMP CREEK

5.7 MI N JCT SH199, Carter, OK

Built 1949 Load: 34.5 t ADT: 1,900

S.H. 7

Good

Over: FLAT BRIDGE CREEK

8.2 MI E STEPHENS C/L, Carter, OK

Built 1992 Load: 34.5 t ADT: 2,300

S.H. 7

Good

Over: EIGHT MILE CREEK

13.0 MI E STEPHENS C/L, Carter, OK

Built 1992 Load: 34.5 t ADT: 1,900

S.H. 53

Good

Over: CADDO CREEK

6 E OF JCT S.H. 76, Carter, OK

Built 2014 Load: 34.5 t ADT: 1,200

N3140 (1054C)

Good

Over: WALNUT BAYOU

.8E 2.7N JCT US70/US70A, Carter, OK

Built 2021 Load: 34.5 t ADT: 270

1070C

Good

Over: CADDO CREEK

4. W 1.8 S OF US 77 & 53, Carter, OK

Built 1994 Load: 34.6 t ADT: 106

I-35 SB

Good

Over: S.H. 53 UNDER

9.2 MI N JCT SH142, Carter, OK

Built 1990 Load: 35.4 t ADT: 14,850

I-35 NB

Good

Over: S.H. 53 UNDER

9.2 MI N JCT SH142, Carter, OK

Built 1990 Load: 35.4 t ADT: 15,400

S.H. 76

Good

Over: WALNUT CREEK

6.3 MI N JCT US70, Carter, OK

Built 1993 Load: 35.4 t ADT: 4,300

S.H. 76

Good

Over: CADDO CREEK OFLOW

2.0 MI N JCT SH53E, Carter, OK

Built 1998 Load: 35.4 t ADT: 3,200

E1890

Good

Over: CREEK

1S .2E JCT. SH-53/SH-53A, Carter, OK

Built 2000 Load: 35.4 t ADT: 100

U.S. 177

Good

Over: CREEK

1.8 MI N JCT SH199, Carter, OK

Built 1951 Load: 35.6 t ADT: 1,900

1026C

Good

Over: CREEK

2 MI N 2.1 W US1 & SH199, Carter, OK

Built 2001 Load: 36.3 t ADT: 42

N3110

Good

Over: CADDO CREEK

1.1N 2E JCT SH76/53E, Carter, OK

Built 2003 Load: 36.3 t ADT: 25

U.S. 70

Good

Over: RED OAK CREEK

1.8E OF JEFFERSON C/L, Carter, OK

Built 2009 Load: 36.3 t ADT: 3,400

U.S. 70 EB

Good

Over: COTTONWOOD CREEK

14.2E JEFFERSON C/L, Carter, OK

Built 2010 Load: 36.3 t ADT: 4,050

E1800

Good

Over: CREEK

3W; 1.6S OF JCT SH7/SH76, Carter, OK

Built 2010 Load: 36.3 t ADT: 545

S.H. 53

Good

Over: CADDO CREEK OFLOW

6.3 E OF JCT S.H. 76, Carter, OK

Built 2014 Load: 36.3 t ADT: 1,200

E2000

Good

Over: HICKORY CREEK

1W OF I-35; 4S OF US 70, Carter, OK

Built 2005 Load: 36.7 t ADT: 100

1058C

Good

Over: CREEK

4.5E 1.3S OF US70 &US70AW, Carter, OK

Built 1988 Load: 37.1 t ADT: 85

E2010

Good

Over: HICKORY CREEK

2N&1.3W OF JCT US77&SH77S, Carter, OK

Built 1999 Load: 37.1 t ADT: 100

N3180

Good

Over: WALNUT CREEK

8.E .7 S OF US 70 & SH76N, Carter, OK

Built 2002 Load: 37.1 t ADT: 100

N3190

Good

Over: CADDO CREEK

1.2E 1.8S OF MILO, Carter, OK

Built 2015 Load: 38.1 t ADT: 100

E1970

Good

Over: CREEK

3.2 W 1. S OF US 70- I35, Carter, OK

Built 1992 Load: 38.3 t ADT: 400

N3170

Good

Over: CADDO CREEK

.5 E .9 S OF MILO, Carter, OK

Built 1992 Load: 39.0 t ADT: 150

1014C

Good

Over: CREEK

.5 MI S 2 E NEWPORT, Carter, OK

Built 1993 Load: 39.0 t ADT: 247

N3360 (1086C)

Good

Over: CREEK

2.W 1.1 N OF US177/SH199, Carter, OK

Built 2001 Load: 39.0 t ADT: 248

U.S. 70

Good

Over: ANADARCHE CREEK

5.6 MI E JCT I-35, Carter, OK

Built 2000 Load: 39.0 t ADT: 2,850

N3070

Good

Over: CADDO CREEK

2.3 N JCT SH 7 & 53 E, Carter, OK

Built 2001 Load: 39.0 t ADT: 100

E1750

Good

Over: WILD HORSE CREEK TRIB.

2.0N;1.0E OF S.H.7/S.H.76, Carter, OK

Built 2007 Load: 39.0 t ADT: 100

1012C

Good

Over: WALNUT CREEK

2.3 MI E HEALDTON, Carter, OK

Built 1993 Load: 39.5 t ADT: 90

E1950

Good

Over: POST OAK CREEK

2.5 W N OF US 70 & SH76N, Carter, OK

Built 2008 Load: 39.5 t ADT: 200

S.H. 53

Good

Over: CREEK

3.9 MI E STEPHENS C/L, Carter, OK

Built 1928 Load: 40.2 t ADT: 550

N3270

Good

Over: HICKORY CREEK

2W&.4S OF JCT US70&US77, Carter, OK

Built 1996 Load: 40.8 t ADT: 400

U.S. 70

Good

Over: HICKORY CREEK

21.9 MI E JEFFERSON C/L, Carter, OK

Built 1990 Load: 41.7 t ADT: 8,900

E1900

Good

Over: WALNUT CREEK

.36W OF SH76 ON E1900, Carter, OK

Built 2014 Load: 41.7 t ADT: 100

E1760 (CARGO RD)

Good

Over: CREEK

1N .8W of JCT SH7/76, Carter, OK

Built 2021 Load: 42.6 t ADT: 100

PLAINVIEW RD

Good

Over: HICKORY CREEK

0.2 N US 70/PLAINVIEW, Carter, OK

Built 2002 Load: 43.0 t ADT: 1,500

I-35 NB

Good

Over: BNSF R.R.

0.3 MI N JCT US70, Carter, OK

Built 1965 Load: 43.3 t ADT: 16,750

E1930

Good

Over: SMITH CREEK

2 N 1.7E OF US177 & SH199, Carter, OK

Built 1989 Load: 43.4 t ADT: 25

1062C

Good

Over: CADDO CREEK

8.3 N OF LONE GROVE, Carter, OK

Built 1991 Load: 43.4 t ADT: 257

N3250

Good

Over: SPRING BRANCH CREEK

2.5 W 6. S OF I-35 & US70, Carter, OK

Built 1993 Load: 43.4 t ADT: 150

E1860

Good

Over: PHILLIPS CREEK

1S & 1.1 W JCT US77 SH53W, Carter, OK

Built 1995 Load: 43.4 t ADT: 100

N3060

Good

Over: POST OAK CREEK

4. W .5 S OF US 70, Carter, OK

Built 1998 Load: 43.4 t ADT: 50

E1887

Good

Over: PHILLIPS CREEK

2.7 S & 1.7 W US77 &SH53E, Carter, OK

Built 1997 Load: 43.4 t ADT: 100

N3210

Good

Over: CREEK

6.5W 4.7S OF I-35 & S.H70, Carter, OK

Built 2005 Load: 43.4 t ADT: 244

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.