Total bridges
13
Public highway bridges in Harding County
County profile · official public datasets
Harding County, NM
13 public highway bridges tracked in the FHWA National Bridge Inventory: 53.8% rated Good, 46.2% Fair, 0% Poor.
- 13
- Public bridges
- 53.8%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Harding County posts a top-quartile lowest Poor-condition share among rated counties in the state across rated county bridge inventory.
- Top 19%
- lowest Poor share in state
- 0%
- Poor-condition share
- 13
- public highway bridges
- 1977
- 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.
Harding County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Harding County ranks #6 of 32 New Mexico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Harding County, New Mexico contains 13 public highway bridges. Roughly 53.8% are rated “Good,” 46.2% “Fair,” and 0% “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
53.8%
7 of 13 rated 7-9
Fair condition
46.2%
6 of 13 rated 5-6
Poor condition
0%
0 of 13 rated 4 or below
In-state Poor-share rank
#6 of 32
Among New Mexico counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 13 NBI-tracked bridges by lowest applicable component rating.
Good 53.8% (7)
Fair 46.2% (6)
Poor 0% (0)
53.8% of Harding County's bridges have passed the 50-year mark
7 of the 13 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 53.8% 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.
When Harding County's bridges were built
13 bridges with a recorded construction year, grouped by decade
- 1940s
1940–1949
2 bridges
- 1950s 1
1950–1959
1 bridges
- 1960s
1960–1969
3 bridges
- 1970s
1970–1979
2 bridges
- 1980s
1980–1989
2 bridges
- 2010s
2010–2019
2 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1960s, when 3 of the county's bridges still in the inventory were built, which is 23.1% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1977) matches the New Mexico average (1973).
How Harding County compares with New Mexico's closest counties by inventory size
The 5 New Mexico counties nearest Harding County in number of bridges, with their condition splits. Its 0% Poor share is the 3rd-lowest of these 6. Its average build year of 1977 against a peer-group mean of 1967 is 10 years newer.
Showing the 5 closest of 31 New Mexico counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Valencia County | 48 | 27.1% | 68.8% | 4.2% | 1977 |
| De Baca County | 24 | 8.3% | 91.7% | 0% | 1959 |
| Curry County | 21 | 47.6% | 52.4% | 0% | 1984 |
| Harding County (this page) | 13 | 53.8% | 46.2% | 0% | 1977 |
| Lea County | 10 | 10% | 90% | 0% | 1967 |
| Roosevelt County | 9 | 33.3% | 66.7% | 0% | 1947 |
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 Harding 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 Harding County, both outside New Mexico so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NM (13 bridges here).
- Bethel County, AK · 13 bridges
- San Juan County, CO · 13 bridges
- Perkins County, NE · 13 bridges
- Wheeler County, NE · 13 bridges
Similar average build year
Nearest mean year-built outside NM (1977 here).
- San Diego County, CA · avg 1977 · 1,632 bridges
- King County, WA · avg 1977 · 1,238 bridges
- Riverside County, CA · avg 1977 · 1,117 bridges
- Shelby County, TN · avg 1977 · 1,077 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (13)
NM-39
FairOver: UNNAMED WATERWAY
12.7 MI N OF JCT US-54, Harding, NM
Built 1942 Load: 24.3 t ADT: 234
NM-39
FairOver: UNNAMED WATERWAY
13.8 MI N OF JCT US-54, Harding, NM
Built 1942 Load: 30.8 t ADT: 234
NM-102
FairOver: BUEYEROS CREEK
18.7 MI NE OF NM-39, Harding, NM
Built 1968 Load: 32.4 t ADT: 46
NM-420
FairOver: UTE CREEK
2.0 MI E OF JCT NM-102, Harding, NM
Built 1981 Load: 34.0 t ADT: 39
NM-39
FairOver: UTE CREEK
24.8 MI N OF US-54/LOGAN, Harding, NM
Built 1976 Load: 38.5 t ADT: 234
NM-102
FairOver: TEQUESQUITE CREEK
3.4 MI NE OF NM-39, Harding, NM
Built 2020 Load: 42.5 t ADT: 80
NM-39
GoodOver: UNNAMED WATERWAY
33.7 MI N OF JCT US-54, Harding, NM
Built 1953 Load: 32.4 t ADT: 234
NM-102
GoodOver: UNNAMED WATERWAY
21.9 MI NE OF NM-39, Harding, NM
Built 1967 Load: 32.4 t ADT: 46
NM-102
GoodOver: UNNAMED WATERWAY
22.4 MI NE OF NM-39, Harding, NM
Built 1967 Load: 32.4 t ADT: 46
NM-102
GoodOver: UTE CREEK
16.1 MI N OF JCT NM-39, Harding, NM
Built 1974 Load: 32.4 t ADT: 46
21-C001
GoodOver: UTE CREEK
4.5 MI. WEST OF JCT SR-39, Harding, NM
Built 1985 Load: 32.4 t ADT: 63
NM-120
GoodOver: Canadian River
24.6 Mi E Of I-25 /NM 120, Harding, NM
Built 2012 Load: 60.7 t ADT: 211
NM-39
GoodOver: MOSQUERO CREEK
29.9 MI N OF JCT US-54, Harding, NM
Built 2017 Load: 61.2 t ADT: 138
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.