Total bridges
99
Public highway bridges in Grant County
County profile · official public datasets
Grant County, NM
99 public highway bridges tracked in the FHWA National Bridge Inventory: 20.2% rated Good, 76.8% Fair, 3% Poor.
- 99
- Public bridges
- 20.2%
- Good condition
- 3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Grant County pairs a better-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- Top 44%
- lowest Poor share in state
- 3%
- Poor-condition share
- 99
- public highway bridges
- 1963
- 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.
Grant County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Grant County ranks #14 of 32 New Mexico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3%). Grant County, New Mexico contains 99 public highway bridges. Roughly 20.2% are rated “Good,” 76.8% “Fair,” and 3% “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
20.2%
20 of 99 rated 7-9
Fair condition
76.8%
76 of 99 rated 5-6
Poor condition
3%
3 of 99 rated 4 or below
In-state Poor-share rank
#14 of 32
Among New Mexico counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 99 NBI-tracked bridges by lowest applicable component rating.
Good 20.2% (20)
Fair 76.8% (76)
Poor 3% (3)
Grant County's Poor-condition bridges carry 14,136 vehicle crossings a day
That is 4.3% of the county's reported daily bridge traffic on 3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,712 crossings a day against 4,385 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 99 of 99 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
79.8% of Grant County's bridges have passed the 50-year mark
79 of the 99 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 20.2% 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 97.5% of the county's Poor-condition bridge traffic
NM-90 over PINOS ALTOS CREEK, built 1961, carries 13,776 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 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 14,136 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Grant County's bridges were built
99 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1940s
1940–1949
23 bridges
- 1950s
1950–1959
21 bridges
- 1960s
1960–1969
26 bridges
- 1970s 8
1970–1979
8 bridges
- 1980s 10
1980–1989
10 bridges
- 1990s 1
1990–1999
1 bridges
- 2000s 1
2000–2009
1 bridges
- 2010s 4
2010–2019
4 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1960s, when 26 of the county's bridges still in the inventory were built, which is 26.3% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1963, 10 years older than the New Mexico average of 1973.
How Grant County compares with New Mexico's closest counties by inventory size
The 5 New Mexico counties nearest Grant County in number of bridges, with their condition splits. Its 3% Poor share is the 3rd-lowest of these 6. Its average build year of 1963 against a peer-group mean of 1969 is 6 years older.
Showing the 5 closest of 31 New Mexico counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Sierra County | 108 | 27.8% | 67.6% | 4.6% | 1971 |
| Luna County | 107 | 26.2% | 73.8% | 0% | 1961 |
| Catron County | 101 | 45.5% | 50.5% | 4% | 1962 |
| Grant County (this page) | 99 | 20.2% | 76.8% | 3% | 1963 |
| Taos County | 94 | 38.3% | 51.1% | 10.6% | 1971 |
| Eddy County | 93 | 41.9% | 58.1% | 0% | 1978 |
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 Grant 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 Grant County, both outside New Mexico so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NM (99 bridges here).
- Washington County, FL · 99 bridges
- Crisp County, GA · 99 bridges
- Harris County, GA · 99 bridges
- Newton County, GA · 99 bridges
Similar average build year
Nearest mean year-built outside NM (1963 here).
- Worcester County, MA · avg 1963 · 1,014 bridges
- Honolulu County, HI · avg 1963 · 682 bridges
- Chester County, PA · avg 1963 · 680 bridges
- Essex County, NJ · avg 1963 · 505 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (99)
NM-113
FairOver: I-10 EBLS/WBLS
12.6 M E JCT NM-494/I-10, Grant, NM
Built 1965 Load: 32.7 t ADT: 130
NM-78
FairOver: TENNESSEE CREEK
12.0 MI W OF JCT US-180, Grant, NM
Built 1964 Load: 32.7 t ADT: 255
US-180
FairOver: CANE SPRING CANYON
15.1 MI NW OF JCT NM90, Grant, NM
Built 1966 Load: 32.7 t ADT: 1,306
US-180
FairOver: CORDELL CANYON
18.1 MI NW OF JCT NM90, Grant, NM
Built 1966 Load: 32.7 t ADT: 1,306
US-180
FairOver: UNNAMED WATERWAY
32.0 MI NW OF JCT NM90, Grant, NM
Built 1965 Load: 32.7 t ADT: 1,105
NM-90
FairOver: UNNAMED WATERWAY
24.7 MI E OF HIDALGO C/L, Grant, NM
Built 1969 Load: 32.7 t ADT: 2,488
NM-211
FairOver: DUCK CREEK
0.2 MI E OF US-180/CLIFF, Grant, NM
Built 1969 Load: 32.7 t ADT: 607
FL-4843
FairOver: SAN VICENTE CREEK
0.04 MI W OF JCT NM-90, Grant, NM
Built 1964 Load: 32.7 t ADT: 2,451
NM-152
FairOver: UNNAMED ARROYO
10.7 MI E OF CENTRAL, Grant, NM
Built 1970 Load: 32.7 t ADT: 1,276
17-B013
FairOver: MIMBRES RIVER
0.01 MI E NM-61 @MP-19.67, Grant, NM
Built 1974 Load: 32.7 t ADT: 180
FL-5850
FairOver: PINOS ALTOS CREEK
0.12 MI E OF JCT NM-90, Grant, NM
Built 1953 Load: 32.7 t ADT: 2,236
17-Z000
FairOver: SILVA CREEK
0.25 MI W OF JCT NM-90, Grant, NM
Built 1948 Load: 32.7 t ADT: 2,236
NM-356
FairOver: UNNAMED WATERWAY
2.05 MI NE OF JCT US-180, Grant, NM
Built 1974 Load: 32.7 t ADT: 2,230
US-180
FairOver: WHITEWATER DRAW
5.9 MI W OF NM-61, Grant, NM
Built 1980 Load: 32.7 t ADT: 2,697
US-180
FairOver: LAMPBRIGHT DRAW
0.85 MI N OF NM-61, Grant, NM
Built 1980 Load: 32.7 t ADT: 2,697
FL-5835
FairOver: PINOS ALTO CREEK
0.2 MI S OF US-180, Grant, NM
Built 1977 Load: 32.7 t ADT: 1,687
17-B019
FairOver: RIO MIMBRES
0.6 MI E OF JCT NM-61, Grant, NM
Built 1981 Load: 32.7 t ADT: 180
17-C071
FairOver: DUCK CREEK
0.35 MI E US-180 @ MP79.0, Grant, NM
Built 1983 Load: 32.7 t ADT: 180
17-Z000
FairOver: SAN VICENTE ARROYO
3.2 MI NE NM90/BRKN-ARROW, Grant, NM
Built 1988 Load: 32.7 t ADT: 180
17-Z011
FairOver: GILA RIVER
21.7 M N JCT US-70/NM-464, Grant, NM
Built 1986 Load: 32.7 t ADT: 28
17-B009
FairOver: HANOVER CREEK
0.6 MI NE JCT NM-356/152, Grant, NM
Built 1990 Load: 32.7 t ADT: 5
FL-4844
FairOver: SAN VICENTE ARROYO
42.7 MI E OF US-70/NM-90, Grant, NM
Built 1972 Load: 32.8 t ADT: 3,332
17-B007
FairOver: HANOVER CREEK
0.4 MI E OF JCT NM-356, Grant, NM
Built 1982 Load: 35.9 t ADT: 1,015
US-180
FairOver: BIG DRY CREEK
0.1 MI S OF CATRON C/L, Grant, NM
Built 1980 Load: 44.1 t ADT: 907
17-6005
FairOver: SAN VICENTE ARROYO
5.8 MI S OF US-180 @ 131., Grant, NM
Built 1948 Load: 53.9 t ADT: 18
17-Z000
FairOver: US-180
39.03 MI N OF I-10/DEMING, Grant, NM
Built 1960 Load: 82.8 t ADT: 188
FSR 150
GoodOver: BLACK CANYON
31.7 MILES N. MIMBRES NM, Grant, NM
Built 2011 Load: 15.9 t ADT: 399
FSR 150
GoodOver: BLACK CANYON TRIBUTARY
1 M E/O BLACK CANYON CAMP, Grant, NM
Built 2018 Load: 21.1 t ADT: 399
US-180
GoodOver: GILA RIVER
28.00 MI NW OF JCT NM90, Grant, NM
Built 1966 Load: 27.2 t ADT: 1,365
NM-152
GoodOver: RIO MIMBRES
0.353 MI E OF JCT NM-61, Grant, NM
Built 1988 Load: 32.3 t ADT: 290
NM-153
GoodOver: NORTHRUP CANYON
0.36 MILES N OF JUNCTION, Grant, NM
Built 1949 Load: 32.7 t ADT: 397
US-180
GoodOver: CAMERON CREEK
2.0 M W OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
US-180
GoodOver: UNNAMED WATERWAY
2.9 M NW OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
US-180
GoodOver: RIO DE ARENAS
4.6 M NW OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
US-180
GoodOver: UNNAMED WATERWAY
4.9 M NW OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
US-180
GoodOver: UNNAMED WATERWAY
5.9 M NW OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
US-180
GoodOver: WEST CANYON
7.0 M NW OF NM-356/BAYARD, Grant, NM
Built 1948 Load: 32.7 t ADT: 11,537
NM-90
GoodOver: REESE CANYON
9.3 MI NE OF HIDALGO C/L, Grant, NM
Built 1952 Load: 32.7 t ADT: 2,488
NM-90
GoodOver: WALK X CANYON
4.8 MI NE OF HIDALGO C/L, Grant, NM
Built 1952 Load: 32.7 t ADT: 1,484
NM-464
GoodOver: ROAD CANYON
18.5 MI N OF US-70, Grant, NM
Built 1958 Load: 32.7 t ADT: 28
NM-464
GoodOver: UNNAMED WATERWAY
19.0 MI N OF JCT US-70, Grant, NM
Built 1958 Load: 32.7 t ADT: 28
NM-211
GoodOver: GILA RIVER
1.72 MI E OF US-180/CLIFF, Grant, NM
Built 1973 Load: 32.7 t ADT: 441
17-B132
GoodOver: Unnamed Waterway
1.0Mi NE NM-61 @ MP 19.67, Grant, NM
Built 2011 Load: 32.7 t ADT: 180
Tyron Ridge Access
GoodOver: Unnamed Waterway
5.8 M S of US-180, Grant, NM
Built 2021 Load: 32.7 t ADT: 180
NM-90
GoodOver: SAN VICENTE ARROYO/ROAD
41.4 MI E OF JCT US-70, Grant, NM
Built 2016 Load: 47.4 t ADT: 8,207
NM-146
GoodOver: I-10 EBL/WBL
Jct NM-146 and I-10, Grant, NM
Built 2021 Load: 55.5 t ADT: 2,600
17-A009
PoorOver: MIMBRES RIVER
0.55 MI E NM-35 @ MP-5.2, Grant, NM
Built 2008 Load: 31.0 t ADT: 180
NM-90
PoorOver: PINOS ALTOS CREEK
0.3 MI W US-180/SILVERCTY, Grant, NM
Built 1961 Load: 32.7 t ADT: 13,776
17-3069
PoorOver: SAPILLO CREEK
0.1 M E NM35/LAKE ROBERT, Grant, NM
Built 1986 Load: 32.7 t ADT: 180
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.