Total bridges
39
Public highway bridges in Costilla County
County profile · official public datasets
Costilla County, CO
39 public highway bridges tracked in the FHWA National Bridge Inventory: 15.4% rated Good, 84.6% Fair, 0% Poor.
- 39
- Public bridges
- 15.4%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Costilla County pairs a top-5% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 3%
- lowest Poor share in state
- 0%
- Poor-condition share
- 39
- public highway bridges
- 1989
- 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.
Costilla County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Costilla County ranks #2 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Costilla County, Colorado contains 39 public highway bridges. Roughly 15.4% are rated “Good,” 84.6% “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
15.4%
6 of 39 rated 7-9
Fair condition
84.6%
33 of 39 rated 5-6
Poor condition
0%
0 of 39 rated 4 or below
In-state Poor-share rank
#2 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 39 NBI-tracked bridges by lowest applicable component rating.
Good 15.4% (6)
Fair 84.6% (33)
Poor 0% (0)
12.8% of Costilla County's bridges have passed the 50-year mark
5 of the 39 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 15.4% 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.
When Costilla County's bridges were built
39 bridges with a recorded construction year, grouped by decade
- 1930s 2
1930–1939
2 bridges
- 1950s 1
1950–1959
1 bridges
- 1960s 1
1960–1969
1 bridges
- 1970s 1
1970–1979
1 bridges
- 1980s
1980–1989
10 bridges
- 1990s
1990–1999
17 bridges
- 2000s 5
2000–2009
5 bridges
- 2010s 2
2010–2019
2 bridges
What this shows Construction peaked in the 1990s, when 17 of the county's bridges still in the inventory were built, which is 43.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1989, 7 years newer than the Colorado average of 1982.
How Costilla County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Costilla County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1980 is 9 years newer.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Jackson County | 47 | 31.9% | 63.8% | 4.3% | 1983 |
| Archuleta County | 44 | 29.5% | 63.6% | 6.8% | 1976 |
| Saguache County | 41 | 48.8% | 43.9% | 7.3% | 1972 |
| Ouray County | 39 | 43.6% | 53.8% | 2.6% | 1991 |
| Costilla County (this page) | 39 | 15.4% | 84.6% | 0% | 1989 |
| Hinsdale County | 31 | 25.8% | 74.2% | 0% | 1979 |
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 Costilla 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 Costilla County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (39 bridges here).
- Edmonson County, KY · 39 bridges
- McCreary County, KY · 39 bridges
- Missaukee County, MI · 39 bridges
- Perquimans County, NC · 39 bridges
Similar average build year
Nearest mean year-built outside CO (1989 here).
- Harris County, TX · avg 1989 · 4,029 bridges
- Mecklenburg County, NC · avg 1989 · 746 bridges
- Buffalo County, NE · avg 1989 · 459 bridges
- Brazos County, TX · avg 1989 · 370 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (39)
SH 159 ML
FairOver: CULEBRA CREEK
S. EDGE OF SAN LUIS, Costilla, CO
Built 1936 Load: 19.1 t ADT: 800
COUNTY ROAD 22.3
FairOver: CULEBRA CREEK
BETWEEN CR L.7 AND M.5, Costilla, CO
Built 1984 Load: 20.2 t ADT: 21
THORFINNSON ROAD
FairOver: EL POSO CREEK
.1 MI S of Malcom Rd, Costilla, CO
Built 2012 Load: 23.6 t ADT: 4
COUNTY ROAD 21
FairOver: JAROSA CREEK
1 MI S OF CR E.5, Costilla, CO
Built 2005 Load: 24.6 t ADT: 58
COUNTY ROAD B
FairOver: RIO COSTILLA
JUST E of CR 13, Costilla, CO
Built 1985 Load: 25.6 t ADT: 81
COUNTY ROAD Z7
FairOver: TRINCHERA CREEK
3.0 MI SE OF SH 160, Costilla, CO
Built 1988 Load: 27.5 t ADT: 124
COUNTY ROAD FF
FairOver: SANGRE DE CRISTO CK
.6 MI W OF SH 159, Costilla, CO
Built 1965 Load: 31.1 t ADT: 17
COUNTY ROAD 21
FairOver: CULEBRA CREEK
Just SE OF CR L.7, Costilla, CO
Built 1955 Load: 32.7 t ADT: 475
COUNTY ROAD L.7
FairOver: CULEBRA CREEK
.2 MI E OF CR 25.5, Costilla, CO
Built 2004 Load: 33.8 t ADT: 67
COUNTY ROAD Z
FairOver: RIO GRANDE RIVER
11.5 MI NW OF SAN ACACIO, Costilla, CO
Built 1987 Load: 35.6 t ADT: 80
COUNTY ROAD 22.4
FairOver: CULEBRA CREEK
BETWEEN CRL.7 AND M.5, Costilla, CO
Built 1990 Load: 36.3 t ADT: 19
COUNTY ROAD 16
FairOver: EASTDALE CANAL
1 MI S OF CR SH 142, Costilla, CO
Built 1987 Load: 37.4 t ADT: 4
COUNTY ROAD 23.5
FairOver: CULEBRA CREEK
JUST N OF CR M.5, Costilla, CO
Built 1988 Load: 38.5 t ADT: 7
COUNTY ROAD K.5
FairOver: SANCHEZ CANAL
1.3 MI SE OF SAN PEDRO, Costilla, CO
Built 1993 Load: 38.5 t ADT: 62
COUNTY ROAD E.5
FairOver: SANCHEZ CANAL
.3 MI SE OF CR 22.3, Costilla, CO
Built 1999 Load: 38.9 t ADT: 58
COUNTY ROAD 21
FairOver: SANCHEZ CANAL
JUST N OF CR H.2, Costilla, CO
Built 1994 Load: 39.2 t ADT: 83
COUNTY ROAD M.5
FairOver: SANCHEZ CANAL
2.0 MI NE OF CHAMA, Costilla, CO
Built 1988 Load: 39.4 t ADT: 14
COUNTY ROAD P
FairOver: CULEBRA EASTDALE CANAL
1 MI W OF SH 159, Costilla, CO
Built 1992 Load: 39.4 t ADT: 374
8TH AVENUE
FairOver: UTE CREEK
IN FORT GARLAND, Costilla, CO
Built 2004 Load: 40.5 t ADT: 10
COUNTY ROAD D.2
FairOver: RIO COSTILLA
JUST E OF CR 12.8, Costilla, CO
Built 1993 Load: 40.5 t ADT: 5
RAILROAD ST.
FairOver: GARLAND DITCH
IN BLANCA, Costilla, CO
Built 1992 Load: 41.3 t ADT: 26
COUNTY ROAD 19
FairOver: CULEBRA CREEK
0.5 MI SW OF CR 21, Costilla, CO
Built 1988 Load: 42.0 t ADT: 88
COUNTY ROAD H
FairOver: CULEBRA EASTDALE CANAL
1 MI W OF SH 159, Costilla, CO
Built 1994 Load: 42.2 t ADT: 73
COUNTY ROAD L.7
FairOver: EL POSO CREEK
JUST W OF CR 25.5, Costilla, CO
Built 1997 Load: 42.7 t ADT: 78
C.RD TRINCHERA
FairOver: SANGRE DE CRISTO CREEK
2.1 MI E OF FORT GARLAND, Costilla, CO
Built 1989 Load: 42.8 t ADT: 531
COUNTY ROAD 10
FairOver: EASTDALE NO.1 CANAL
2.3 MI S OF CR H, Costilla, CO
Built 2002 Load: 42.9 t ADT: 27
COUNTY ROAD FF
FairOver: SANGRE DE CRISTO CK
4.4 MI W OF SH 159, Costilla, CO
Built 2013 Load: 44.7 t ADT: 16
COUNTY ROAD GG.5
FairOver: GARLAND DITCH
0.7 MI WSW OF FT. GARLAND, Costilla, CO
Built 1997 Load: 45.9 t ADT: 41
COUNTY ROAD EE
FairOver: SANGRE DE CRISTO CREEK
.2 MI S OF SH 160, Costilla, CO
Built 1991 Load: 47.1 t ADT: 138
COUNTY ROAD J.2
FairOver: SANCHEZ CANAL
1 MI SE OF CR 21, Costilla, CO
Built 1988 Load: 47.2 t ADT: 217
COUNTY ROAD E.5
FairOver: SAN FRANCISCO CREEK
200 FT S OF CR J.2, Costilla, CO
Built 1996 Load: 47.4 t ADT: 55
ARCHIE STREET
FairOver: RITO SECO
IN TOWN OF SAN LUIS, Costilla, CO
Built 1990 Load: 51.2 t ADT: 225
6TH STREET
FairOver: RITO SECO
50 FT E OF SH 159, Costilla, CO
Built 1990 Load: 59.6 t ADT: 257
COUNTY ROAD 15
GoodOver: CULEBRA EASTDALE CANAL
JUST N OF CR P.7 AND 14.6, Costilla, CO
Built 1990 Load: 32.7 t ADT: 41
COUNTY ROAD P.6
GoodOver: UNNAMED DRAINAGE
0.4 MI E OF SAN LUIS, Costilla, CO
Built 2006 Load: 32.8 t ADT: 1,230
COUNTY ROAD M.5
GoodOver: CULEBRA CREEK
.2 MI SE OF CR L.7, Costilla, CO
Built 1992 Load: 33.4 t ADT: 84
COUNTY ROAD 18
GoodOver: SANGRE DE CRISTO CREEK
.6 MI W OF SH 159, Costilla, CO
Built 1992 Load: 42.6 t ADT: 37
US 160 ML
GoodOver: CANAL
@ BLANCA 21 MI E OF ALAM, Costilla, CO
Built 1970 Load: 99.9 t ADT: 5,000
SH 142 ML
GoodOver: RITO SECO CREEK
IN SAN LUIS, Costilla, CO
Built 1936 Load: 99.9 t ADT: 440
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.