County profile · official public datasets

Miller County, AR

216 public highway bridges tracked in the FHWA National Bridge Inventory: 64.4% rated Good, 32.9% Fair, 2.8% Poor.

216
Public bridges: 64.4%
Good condition: 2.8%
Poor condition

The verdict

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

Miller County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 23%
lowest Poor share in state: 2.8%
Poor-condition share: 216
public highway bridges: 1986
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.

Miller County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Miller County ranks #17 of 75 Arkansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.8%). Miller County, Arkansas contains 216 public highway bridges. Roughly 64.4% are rated “Good,” 32.9% “Fair,” and 2.8% “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

216

Public highway bridges in Miller County

Good condition

64.4%

139 of 216 rated 7-9

Fair condition

32.9%

71 of 216 rated 5-6

Poor condition

2.8%

6 of 216 rated 4 or below

In-state Poor-share rank

#17 of 75

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

Condition distribution

Share of 216 NBI-tracked bridges by lowest applicable component rating.

Good

64.4% (139)

Fair

32.9% (71)

Poor

2.8% (6)

Miller County's Poor-condition bridges carry 2,747 vehicle crossings a day

That is 0.3% of the county's reported daily bridge traffic on 2.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 458 crossings a day against 5,124 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 216 of 216 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

35.2% of Miller County's bridges have passed the 50-year mark

76 of the 216 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 64.4% 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 26.6% of the county's Poor-condition bridge traffic

SH 237 SEC.01-9.83 over SULPHUR RIVER, built 1963, carries 730 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 6-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,747 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

9
1930s

3
1940s

9
1950s

8
1960s

35
1970s

21
1980s

11
1990s

22
2000s

70
2010s

25
2020s

3

What this shows Construction peaked in the 2000s, when 70 of the county's bridges still in the inventory were built, which is 32.4% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1986, 6 years newer than the Arkansas average of 1980.

How Miller County compares with Arkansas's closest counties by inventory size

The 5 Arkansas counties nearest Miller County in number of bridges, with their condition splits. Its 2.8% Poor share is the 3rd-lowest of these 6. Its average build year of 1986 against a peer-group mean of 1974 is 12 years newer.

Showing the 5 closest of 74 Arkansas counties eligible for comparison.

Bridge inventory size and condition shares for Miller County and the 5 Arkansas counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Yell County	227	54.6%	44.1%	1.3%	1971
Hot Spring County	222	22.1%	73%	5%	1972
Polk County	221	20.8%	66.5%	12.7%	1965
Faulkner County	219	56.6%	42%	1.4%	1987
Miller County (this page)	216	64.4%	32.9%	2.8%	1986
Clark County	202	43.1%	54%	3%	1974

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

Similar inventory size

Nearest county inventories outside AR (216 bridges here).

Coffee County, AL · 216 bridges
Ascension County, LA · 216 bridges
Clinton County, MI · 216 bridges
Choctaw County, OK · 216 bridges

Similar average build year

Nearest mean year-built outside AR (1986 here).

El Paso County, TX · avg 1986 · 783 bridges
Caddo County, LA · avg 1986 · 682 bridges
Weld County, CO · avg 1986 · 614 bridges
Polk County, IA · avg 1986 · 545 bridges

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

All 216 Good 139 Fair 71 Poor 6

Good-condition bridges (139)

Sort:

Miller County Bridge Snapshot

Condition distribution

Miller County's Poor-condition bridges carry 2,747 vehicle crossings a day

35.2% of Miller County's bridges have passed the 50-year mark

One structure carries 26.6% of the county's Poor-condition bridge traffic

How Miller County compares with Arkansas's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (139)

US 71-SEC. 01-4.92

SH 237 SEC.00-4.57

I 49 SEC1-30.25

LINE FERRY ROAD

CR 2 - F-8.40

S.H.160 -00-4.96

SH 134 SEC.01-3.19

EAST 24TH STREET

C.R.-14 - A - 4.83

C.R.26 ZONE E-0.93

C.R. 26 ZONE -E

C.R. 10 -D- 9.69

COOPER TIRE RD

CR 21 - B - 2.98

PHILLIPS LANE 0.61

CR 19 LINEFERRY RD

CO RD 80 ZONE F

CR 21-B-3.06

C.R. 25 - B- 4.51

CR 21 - B - 2.93

PRESTON ST -B-0.04

RAMP E-S SH 151

S.H.151 SEC0-0.59

PINSON STREET- C

US 71-SEC. 02-8.02

US 82 SEC.01-13.53

SH 296-SEC 0- 4.13

I 49 -01-29.02

U.S.67-01-18.19

I 49 - 01-18.70

I 49 - 01 -18.76

I 49 S.&N.B-20.88

I 49 S&N.B-21.05

I 49- 21 -37.60

I 49-01-3.58

I 49 SEC.01-17.73

RAMP N-E I 49

GARLAND AVE.ZONE C

I 49 S.& N.B-20.47

I 49-1-36.16

I 49-01-2.83

CO RD 112

S.H. 237 - 01-2.06

US 71 SEC-2-14.56

I-49 SB 0.58

I-49 NB 0.57

US 71 SEC.02-10.69

I 49-SEC 1 S.B.L

I 49 01-SB LNS

I 49 NB Lns

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