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

All bridges (339)

N3210

Good

Over: CREEK

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

Built 2005 Load: 43.4 t ADT: 244

S.H. 199

Good

Over: SAND BRANCH CREEK

7.2E OF U.S. 77/S.H. 199, Carter, OK

Built 2011 Load: 43.5 t ADT: 6,000

S.H. 76

Good

Over: WHISKEY CREEK

5.9 MI N JCT US70, Carter, OK

Built 1993 Load: 44.5 t ADT: 4,300

S.H. 76

Good

Over: RED BRANCH CREEK

8.7 MI N JCT US70, Carter, OK

Built 1993 Load: 44.5 t ADT: 3,100

E1810

Good

Over: RUSSELL PRETTY BRANCH

3.0N;2.8E OF S.H.53/S.H76, Carter, OK

Built 2007 Load: 44.5 t ADT: 100

E2000

Good

Over: BULL CREEK

2W OF BROCK, Carter, OK

Built 2010 Load: 44.9 t ADT: 200

E1830

Good

Over: BEAR CREEK

1.N 5.3E OF JCT SH76 &53E, Carter, OK

Built 1999 Load: 46.3 t ADT: 50

1030C

Good

Over: SIMOM CREEK

5MIS-.2MIW US70 & US76N, Carter, OK

Built 1989 Load: 46.9 t ADT: 236

E2000

Good

Over: WILSON CREEK

5S .1W OF SH199/US177, Carter, OK

Built 1998 Load: 46.9 t ADT: 200

I-35 NB

Good

Over: CO. RD. E189.0 UNDER

5.1 MI N JCT SH142, Carter, OK

Built 1965 Load: 49.0 t ADT: 16,250

I-35 SB

Good

Over: CO. RD. E189.0 UNDER

5.1 MI N JCT SH142, Carter, OK

Built 1965 Load: 49.0 t ADT: 15,600

U.S. 70

Good

Over: BNSF R.R. & RD. UNDER

0.9 MI E JCT I-35, Carter, OK

Built 2000 Load: 52.6 t ADT: 3,100

S.H. 76

Good

Over: S. BRANCH RED OAK CREEK

2.4 MI N JCT US70, Carter, OK

Built 1936 Load: 53.3 t ADT: 4,200

N3090

Good

Over: CREEK

1 E .6 N OF SH7/SH76, Carter, OK

Built 2007 Load: 59.9 t ADT: 160

I-35

Good

Over: TULIP CREEK

1.8 MI N JCT SH53, Carter, OK

Built 1968 Load: 62.4 t ADT: 30,800

4TH AVE NW

Good

Over: CREEK

0.1 E ROCKFORD/4TH NW, Carter, OK

Built 2004 Load: 63.0 t ADT: 3,696

U.S. 70

Good

Over: CREEK

3.0 MI E JCT I-35, Carter, OK

Built 2000 Load: 73.5 t ADT: 3,000

S.H. 7

Good

Over: CREEK

4.0 MI E STEPHENS C/L, Carter, OK

Built 1933 Load: 83.7 t ADT: 2,400

S.H. 53

Good

Over: WEST SPRING CREEK

8.3 E OF SH. 76, Carter, OK

Built 2020 Load: 87.5 t ADT: 1,400

S.H. 199

Good

Over: CREEK

5.3 MI E JCT US77, Carter, OK

Built 1959 Load: 90.7 t ADT: 6,000

S.H. 53

Good

Over: CREEK

13.8 E S.H. 76, Carter, OK

Built 2020 Load: 90.7 t ADT: 1,400

S.H. 7

Good

Over: CREEK

10.3 MI E STEPHENS C/L, Carter, OK

Built 1933 Load: 97.0 t ADT: 1,900

N3143 (1056C)

Good

Over: BEAR CREEK TRIB.

4.6 S & .3 E JCT SH7/SH74, Carter, OK

Built 2016 Load: 99.9 t ADT: 250

MCCLAIN RD

Poor

Over: CREEK

0.9 W HARVEY/MCCLAIN, Carter, OK

Built 1950 Load: 0.0 t ADT: 50

MELTON AVENUE

Poor

Over: CREEK

.45E OF SH 53A, Carter, OK

Built 2020 Load: 0.0 t ADT: 100

E1880

Poor

Over: CREEK

1S & .5E JCT US77 & SH53E, Carter, OK

Built 1992 Load: 11.8 t ADT: 100

N3160

Poor

Over: COTTONWOOD CREEK

7E & 3.2 S JCT SH76 & 53W, Carter, OK

Built 1938 Load: 21.8 t ADT: 100

1054C

Poor

Over: CREEK

.8E&1.7N;JCT US70&US70A E, Carter, OK

Built 1941 Load: 22.5 t ADT: 1,062

E1750

Poor

Over: CREEK

2N .7W OF SH 7 / SH 76, Carter, OK

Built 1992 Load: 24.5 t ADT: 100

N3060

Poor

Over: WILD HORSE CREEK

.3 W .9 S OF TUSSY, Carter, OK

Built 1993 Load: 31.8 t ADT: 100

E1940

Poor

Over: CREEK

2.N 4.4W OF US70 & SH 76N, Carter, OK

Built 1988 Load: 32.8 t ADT: 100

1012C

Poor

Over: CREEK

4N & 2.9E JCT US70 &SH76N, Carter, OK

Built 1990 Load: 36.7 t ADT: 90

1002C

Poor

Over: SANDY BEAR CREEK

4N & .6 W JCT 7 & SH 76, Carter, OK

Built 1987 Load: 38.1 t ADT: 442

E1805

Poor

Over: CREEK

3.5 S .6 W SH 7 & 76, Carter, OK

Built 1988 Load: 38.1 t ADT: 100

N3250

Poor

Over: CREEK

1.4S&3.5W OF I-35&US70W, Carter, OK

Built 1985 Load: 43.4 t ADT: 200

E1830

Poor

Over: CREEK

2. N JCT I-35 & SH 53, Carter, OK

Built 1994 Load: 47.2 t ADT: 100

E1730

Poor

Over: MOSS CREEK

1.0 N & 1.1 JCT SH 7 & 74, Carter, OK

Built 1992 Load: 49.9 t ADT: 100

E1770

Poor

Over: CREEK

0.6 MI E OF SH 7 & 76, Carter, OK

Built 1992 Load: 59.9 t ADT: 100

E1980

Poor

Over: CREEK

2N 1.1E JCT US70 & SH77SE, Carter, OK

Built 1998 Load: 72.6 t ADT: 250

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.