Total bridges
179
Public highway bridges in Graham County
County profile · official public datasets
Graham County, AZ
179 public highway bridges tracked in the FHWA National Bridge Inventory: 44.1% rated Good, 52% Fair, 3.9% Poor.
- 179
- Public bridges
- 44.1%
- Good condition
- 3.9%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Graham County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 13th
- of 15 on Poor share
- 3.9%
- Poor-condition share
- 179
- public highway bridges
- 1954
- 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.
Graham County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Graham County ranks #13 of 15 Arizona counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.9%). Graham County, Arizona contains 179 public highway bridges. Roughly 44.1% are rated “Good,” 52% “Fair,” and 3.9% “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
44.1%
79 of 179 rated 7-9
Fair condition
52%
93 of 179 rated 5-6
Poor condition
3.9%
7 of 179 rated 4 or below
In-state Poor-share rank
#13 of 15
Among Arizona counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 179 NBI-tracked bridges by lowest applicable component rating.
Good 44.1% (79)
Fair 52% (93)
Poor 3.9% (7)
Graham County's Poor-condition bridges carry 1,184 vehicle crossings a day
That is 0.3% of the county's reported daily bridge traffic on 3.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 169 crossings a day against 2,144 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 179 of 179 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
81.6% of Graham County's bridges have passed the 50-year mark
146 of the 179 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 44.1% 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 32.9% of the county's Poor-condition bridge traffic
IRR BIA RTE 3 over KELLY GULCH, built 1929, carries 390 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 7-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,184 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Graham County's bridges were built
179 bridges with a recorded construction year, grouped by decade
- 1900s 6
1900–1909
6 bridges
- 1920s
1920–1929
32 bridges
- 1930s
1930–1939
29 bridges
- 1940s
1940–1949
15 bridges
- 1950s
1950–1959
37 bridges
- 1960s
1960–1969
21 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s 10
1980–1989
10 bridges
- 1990s 9
1990–1999
9 bridges
- 2000s 4
2000–2009
4 bridges
- 2010s 9
2010–2019
9 bridges
What this shows Construction peaked in the 1950s, when 37 of the county's bridges still in the inventory were built, which is 20.7% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1954, 23 years older than the Arizona average of 1977.
How Graham County compares with Arizona's closest counties by inventory size
The 5 Arizona counties nearest Graham County in number of bridges, with their condition splits. Its 3.9% Poor share is the 4th-lowest of these 6. Its average build year of 1954 against a peer-group mean of 1969 is 15 years older.
Showing the 5 closest of 14 Arizona counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Yuma County | 262 | 50.4% | 47.7% | 1.9% | 1973 |
| Apache County | 259 | 48.3% | 45.9% | 5.8% | 1973 |
| Gila County | 259 | 60.2% | 37.5% | 2.3% | 1975 |
| Graham County (this page) | 179 | 44.1% | 52% | 3.9% | 1954 |
| Santa Cruz County | 138 | 55.8% | 42.8% | 1.4% | 1966 |
| Greenlee County | 90 | 43.3% | 52.2% | 4.4% | 1958 |
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 Graham 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 Graham County, both outside Arizona so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside AZ (179 bridges here).
- Thomas County, GA · 179 bridges
- Carroll County, IL · 179 bridges
- Fremont County, IA · 179 bridges
- Morris County, KS · 179 bridges
Similar average build year
Nearest mean year-built outside AZ (1954 here).
- Glenn County, CA · avg 1954 · 242 bridges
- Menard County, TX · avg 1954 · 63 bridges
- Foard County, TX · avg 1954 · 60 bridges
- Throckmorton County, TX · avg 1954 · 53 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (79)
US 191
GoodOver: Wash
23.1 mi S Jct US 70, Graham, AZ
Built 1946 Load: 75.3 t ADT: 2,860
IRR US 70
GoodOver: Wash
6.0 mi E Jct SR 170, Graham, AZ
Built 1955 Load: 81.6 t ADT: 2,904
IRR US 70
GoodOver: Wash
26.5 mi E SR 170, Graham, AZ
Built 1958 Load: 81.6 t ADT: 2,940
US 191
GoodOver: Owl Canyon
23.9 mi S Jct US 70, Graham, AZ
Built 1946 Load: 81.6 t ADT: 2,860
IRR US 70
GoodOver: Wash
17.2 mi E SR 170, Graham, AZ
Built 1956 Load: 88.0 t ADT: 2,940
IRR BIA ROUTE 193
GoodOver: LOCAL DRAINAGE
2.27KM NORTH OF BIA RTE 8, Graham, AZ
Built 2016 Load: 89.8 t ADT: 500
IRR US 70
GoodOver: Wash
4.1 mi E Jct SR 170, Graham, AZ
Built 1957 Load: 89.8 t ADT: 2,911
IRR US 70
GoodOver: Wash
32.4 mi E Jct SR 77, Graham, AZ
Built 1956 Load: 89.8 t ADT: 2,904
IRR US 70
GoodOver: Bone Spring Canyon
32.6 mi E Jct SR 77, Graham, AZ
Built 1956 Load: 89.8 t ADT: 2,911
IRR US 70
GoodOver: Wash
24.9 mi E SR 170, Graham, AZ
Built 1958 Load: 89.8 t ADT: 2,940
US 70
GoodOver: Wash
20.3 mi W Jct SR 75, Graham, AZ
Built 1938 Load: 89.8 t ADT: 1,063
SR 266
GoodOver: Bear Canyon
8.5 mi W Jct US 191, Graham, AZ
Built 1962 Load: 89.8 t ADT: 225
SR 266
GoodOver: Stockton Wash
8.8 mi W Jct US 191, Graham, AZ
Built 1962 Load: 89.8 t ADT: 225
SR 266
GoodOver: Pitchfork Canyon
14.0 mi W Jct US 191, Graham, AZ
Built 1962 Load: 89.8 t ADT: 225
US 191
GoodOver: Wash
28.2 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Wash
27.7 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Wash
27.1 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Wash
26.6 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Willow Spring
25.1 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: WA Canyon
23.3 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,497
US 191
GoodOver: Wash
21.3 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Wash
20.5 mi S Jct US 70, Graham, AZ
Built 1946 Load: 89.8 t ADT: 2,860
US 191
GoodOver: Wash
10.2 mi S Jct US 70, Graham, AZ
Built 1938 Load: 89.8 t ADT: 2,901
US 191
GoodOver: Jacobson Wash
8.2 mi S Jct US 70, Graham, AZ
Built 1960 Load: 89.8 t ADT: 2,901
US 191
GoodOver: Wash
7.9 mi S Jct US 70, Graham, AZ
Built 1936 Load: 89.8 t ADT: 2,901
US 191
GoodOver: Drainage Channel
4 Mi S Jct SR 75, Graham, AZ
Built 2003 Load: 89.8 t ADT: 3,989
SR 78
GoodOver: Murder Camp Wash
7.9 mi E Jct US 191, Graham, AZ
Built 2003 Load: 89.8 t ADT: 358
US 191
GoodOver: Wash
12 mi N Jct I-10, Graham, AZ
Built 2005 Load: 89.8 t ADT: 2,860
4010: HAEKEL ROAD
GoodOver: Slick Rock Wash
13 mi SE of Safford AZ, Graham, AZ
Built 1972 Load: 97.2 t ADT: 50
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.