Costilla County, CO

39 public highway bridges

Costilla County Bridge Snapshot

Costilla County, Colorado contains 39 public highway bridges in the FHWA National Bridge Inventory. Roughly 15.4% are rated “Good,” 84.6% “Fair,” 0% “Poor,” and 0% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CO are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

39

Total Bridges

15.4%

Good

0%

Poor

0%

Structurally Deficient

Condition Distribution

Good

15.4% (6)

Fair

84.6% (33)

Poor

0% (0)

SD

0% (0)

All Bridges (39)

Sort:

SH 159 ML

Over: CULEBRA CREEK

S. EDGE OF SAN LUIS, Costilla, CO

Built 1936 Load: 19.1 t ADT: 800

COUNTY ROAD 22.3

Over: CULEBRA CREEK

BETWEEN CR L.7 AND M.5, Costilla, CO

Built 1984 Load: 20.2 t ADT: 21

THORFINNSON ROAD

Over: EL POSO CREEK

.1 MI S of Malcom Rd, Costilla, CO

Built 2012 Load: 23.6 t ADT: 4

COUNTY ROAD 21

Over: JAROSA CREEK

1 MI S OF CR E.5, Costilla, CO

Built 2005 Load: 24.6 t ADT: 58

COUNTY ROAD B

Over: RIO COSTILLA

JUST E of CR 13, Costilla, CO

Built 1985 Load: 25.6 t ADT: 81

COUNTY ROAD Z7

Over: TRINCHERA CREEK

3.0 MI SE OF SH 160, Costilla, CO

Built 1988 Load: 27.5 t ADT: 124

COUNTY ROAD FF

Over: SANGRE DE CRISTO CK

.6 MI W OF SH 159, Costilla, CO

Built 1965 Load: 31.1 t ADT: 17

COUNTY ROAD 21

Over: CULEBRA CREEK

Just SE OF CR L.7, Costilla, CO

Built 1955 Load: 32.7 t ADT: 475

COUNTY ROAD L.7

Over: CULEBRA CREEK

.2 MI E OF CR 25.5, Costilla, CO

Built 2004 Load: 33.8 t ADT: 67

COUNTY ROAD Z

Over: RIO GRANDE RIVER

11.5 MI NW OF SAN ACACIO, Costilla, CO

Built 1987 Load: 35.6 t ADT: 80

COUNTY ROAD 22.4

Over: CULEBRA CREEK

BETWEEN CRL.7 AND M.5, Costilla, CO

Built 1990 Load: 36.3 t ADT: 19

COUNTY ROAD 16

Over: EASTDALE CANAL

1 MI S OF CR SH 142, Costilla, CO

Built 1987 Load: 37.4 t ADT: 4

COUNTY ROAD 23.5

Over: CULEBRA CREEK

JUST N OF CR M.5, Costilla, CO

Built 1988 Load: 38.5 t ADT: 7

COUNTY ROAD K.5

Over: SANCHEZ CANAL

1.3 MI SE OF SAN PEDRO, Costilla, CO

Built 1993 Load: 38.5 t ADT: 62

COUNTY ROAD E.5

Over: SANCHEZ CANAL

.3 MI SE OF CR 22.3, Costilla, CO

Built 1999 Load: 38.9 t ADT: 58

COUNTY ROAD 21

Over: SANCHEZ CANAL

JUST N OF CR H.2, Costilla, CO

Built 1994 Load: 39.2 t ADT: 83

COUNTY ROAD M.5

Over: SANCHEZ CANAL

2.0 MI NE OF CHAMA, Costilla, CO

Built 1988 Load: 39.4 t ADT: 14

COUNTY ROAD P

Over: CULEBRA EASTDALE CANAL

1 MI W OF SH 159, Costilla, CO

Built 1992 Load: 39.4 t ADT: 374

8TH AVENUE

Over: UTE CREEK

IN FORT GARLAND, Costilla, CO

Built 2004 Load: 40.5 t ADT: 10

COUNTY ROAD D.2

Over: RIO COSTILLA

JUST E OF CR 12.8, Costilla, CO

Built 1993 Load: 40.5 t ADT: 5

RAILROAD ST.

Over: GARLAND DITCH

IN BLANCA, Costilla, CO

Built 1992 Load: 41.3 t ADT: 26

COUNTY ROAD 19

Over: CULEBRA CREEK

0.5 MI SW OF CR 21, Costilla, CO

Built 1988 Load: 42.0 t ADT: 88

COUNTY ROAD H

Over: CULEBRA EASTDALE CANAL

1 MI W OF SH 159, Costilla, CO

Built 1994 Load: 42.2 t ADT: 73

COUNTY ROAD L.7

Over: EL POSO CREEK

JUST W OF CR 25.5, Costilla, CO

Built 1997 Load: 42.7 t ADT: 78

C.RD TRINCHERA

Over: SANGRE DE CRISTO CREEK

2.1 MI E OF FORT GARLAND, Costilla, CO

Built 1989 Load: 42.8 t ADT: 531

COUNTY ROAD 10

Over: EASTDALE NO.1 CANAL

2.3 MI S OF CR H, Costilla, CO

Built 2002 Load: 42.9 t ADT: 27

COUNTY ROAD FF

Over: 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

Over: GARLAND DITCH

0.7 MI WSW OF FT. GARLAND, Costilla, CO

Built 1997 Load: 45.9 t ADT: 41

COUNTY ROAD EE

Over: SANGRE DE CRISTO CREEK

.2 MI S OF SH 160, Costilla, CO

Built 1991 Load: 47.1 t ADT: 138

COUNTY ROAD J.2

Over: SANCHEZ CANAL

1 MI SE OF CR 21, Costilla, CO

Built 1988 Load: 47.2 t ADT: 217

COUNTY ROAD E.5

Over: SAN FRANCISCO CREEK

200 FT S OF CR J.2, Costilla, CO

Built 1996 Load: 47.4 t ADT: 55

ARCHIE STREET

Over: RITO SECO

IN TOWN OF SAN LUIS, Costilla, CO

Built 1990 Load: 51.2 t ADT: 225

6TH STREET

Over: RITO SECO

50 FT E OF SH 159, Costilla, CO

Built 1990 Load: 59.6 t ADT: 257

COUNTY ROAD 15

Over: 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

Over: UNNAMED DRAINAGE

0.4 MI E OF SAN LUIS, Costilla, CO

Built 2006 Load: 32.8 t ADT: 1,230

COUNTY ROAD M.5

Over: CULEBRA CREEK

.2 MI SE OF CR L.7, Costilla, CO

Built 1992 Load: 33.4 t ADT: 84

COUNTY ROAD 18

Over: SANGRE DE CRISTO CREEK

.6 MI W OF SH 159, Costilla, CO

Built 1992 Load: 42.6 t ADT: 37

US 160 ML

Over: CANAL

@ BLANCA, 21 MI E OF ALAM, Costilla, CO

Built 1970 Load: 99.9 t ADT: 5,000

SH 142 ML

Over: 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.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026