Total bridges
62
Public highway bridges in Conejos County
County profile · official public datasets
Conejos County, CO
62 public highway bridges tracked in the FHWA National Bridge Inventory: 38.7% rated Good, 46.8% Fair, 14.5% Poor.
- 62
- Public bridges
- 38.7%
- Good condition
- 14.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Conejos 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.
- 63rd
- of 64 on Poor share
- 14.5%
- Poor-condition share
- 62
- public highway bridges
- 1976
- 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.
Conejos County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Conejos County ranks #63 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.5%). Conejos County, Colorado contains 62 public highway bridges. Roughly 38.7% are rated “Good,” 46.8% “Fair,” and 14.5% “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
38.7%
24 of 62 rated 7-9
Fair condition
46.8%
29 of 62 rated 5-6
Poor condition
14.5%
9 of 62 rated 4 or below
In-state Poor-share rank
#63 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 62 NBI-tracked bridges by lowest applicable component rating.
Good 38.7% (24)
Fair 46.8% (29)
Poor 14.5% (9)
Conejos County's Poor-condition bridges carry 3,805 vehicle crossings a day
That is 12.8% of the county's reported daily bridge traffic on 14.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 423 crossings a day against 380 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 62 of 62 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
41.9% of Conejos County's bridges have passed the 50-year mark
26 of the 62 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 38.7% 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 84.1% of the county's Poor-condition bridge traffic
US 285 ML over CONEJOS RIV.OVERFLOW, built 1929, carries 3,200 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 9-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,805 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Conejos County's bridges were built
62 bridges with a recorded construction year, grouped by decade
- pre-1900 1
Built before 1900
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 5
1930–1939
5 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s
1950–1959
7 bridges
- 1960s 6
1960–1969
6 bridges
- 1970s 3
1970–1979
3 bridges
- 1980s
1980–1989
11 bridges
- 1990s
1990–1999
17 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 1990s, when 17 of the county's bridges still in the inventory were built, which is 27.4% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1976, 6 years older than the Colorado average of 1982.
How Conejos County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Conejos County in number of bridges, with their condition splits. Its 14.5% Poor share is the 6th-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1982 is 6 years older.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Delta County | 64 | 51.6% | 45.3% | 3.1% | 1986 |
| Sedgwick County | 64 | 40.6% | 57.8% | 1.6% | 1981 |
| Pitkin County | 62 | 38.7% | 58.1% | 3.2% | 1985 |
| Conejos County (this page) | 62 | 38.7% | 46.8% | 14.5% | 1976 |
| Cheyenne County | 61 | 57.4% | 42.6% | 0% | 1978 |
| Montezuma County | 61 | 27.9% | 63.9% | 8.2% | 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 Conejos 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 Conejos County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (62 bridges here).
- Gulf County, FL · 62 bridges
- Pickens County, GA · 62 bridges
- Switzerland County, IN · 62 bridges
- Lake of the Woods County, MN · 62 bridges
Similar average build year
Nearest mean year-built outside CO (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (29)
COUNTY ROAD 13
FairOver: CONEJOS RIVER
JUST S OF CR H, Conejos, CO
Built 1971 Load: 15.7 t ADT: 393
COUNTY ROAD 8
FairOver: ALAMOSA RIVER
0.2 MI N OF CAPULIN/SH 15, Conejos, CO
Built 1968 Load: 16.0 t ADT: 102
COUNTY ROAD 8
FairOver: LA JARA CREEK
0.4 MI S OF CAPULIN/SH 15, Conejos, CO
Built 1933 Load: 16.3 t ADT: 35
FDR 260
FairOver: ALAMOSA RIVER
17 MI SSW OF MONTE VISTA, Conejos, CO
Built 1933 Load: 16.8 t ADT: 18
US 285 ML
FairOver: CONEJOS RIVER
2.5 MI N OF ANTONITO, Conejos, CO
Built 1929 Load: 17.9 t ADT: 3,200
COUNTY ROAD M
FairOver: RIO SAN ANTONIO
1.5 MI NE OF CR 19, Conejos, CO
Built 1980 Load: 19.7 t ADT: 82
SH 17 ML
FairOver: BR. OF CONEJOS RIVER
4.6 MI W OF ANTONITO, Conejos, CO
Built 1958 Load: 19.9 t ADT: 960
COUNTY ROAD 16
FairOver: CONEJOS RIVER
1.4 MI N OF CR H, Conejos, CO
Built 1974 Load: 23.4 t ADT: 51
FSR 250.6A
FairOver: CONEJOS RIVER
.10 MI ON FSR 250.6A, Conejos, CO
Built 1969 Load: 24.0 t ADT: 116
SH 17 ML
FairOver: CONEJOS RIVER
4.7 MI W OF ANTONITO, Conejos, CO
Built 1958 Load: 25.3 t ADT: 960
SH 142 ML
FairOver: N FK CONEJOS RIVER
1.4 MILES EAST OF MANASSA, Conejos, CO
Built 1935 Load: 25.8 t ADT: 530
SH 15 ML
FairOver: LA JARA CREEK
.9 MI W OF 285 @ LA JARA, Conejos, CO
Built 1938 Load: 26.1 t ADT: 1,300
SH 142 ML
FairOver: RIO SAN ANTONIO
3.5 MILES EAST OF MANASSA, Conejos, CO
Built 1940 Load: 26.1 t ADT: 530
COUNTY ROAD 17.5
FairOver: N. BRANCH CONEJOS RIVER
.3 MI S OF CR N, Conejos, CO
Built 1989 Load: 27.5 t ADT: 59
SH 17 ML
FairOver: CONEJOS RIVER
18 MI NE OF NEW MEXICO S., Conejos, CO
Built 1965 Load: 30.0 t ADT: 420
SH 371 ML
FairOver: ALAMOSA RIVER
1 MI NO OF JCT SH 15, Conejos, CO
Built 1954 Load: 30.5 t ADT: 790
US 285 ML
FairOver: RIO SAN ANTONIO
4.8 MI NORTH OF NEW MEXIC, Conejos, CO
Built 1938 Load: 30.7 t ADT: 1,200
GOSHAWK DETENTION
FairOver: Goshawk Dam Spillway
6.3 mi NE of Antonito CO, Conejos, CO
Built 1999 Load: 30.8 t ADT: 25
COUNTY ROAD 16
FairOver: N. CONEJOS RIVER
2.4 MI N OF CR H, Conejos, CO
Built 1995 Load: 35.7 t ADT: 77
US 285 ML
FairOver: ALAMOSA CREEK
11.5 MI S OF ALAMOSA, Conejos, CO
Built 1959 Load: 35.9 t ADT: 5,200
COUNTY ROAD CC
FairOver: MONTE VISTA CANAL
AT CR CC AND CR 11, Conejos, CO
Built 1992 Load: 36.4 t ADT: 47
COUNTY ROAD BB
FairOver: EMPIRE CANAL
1.4 MI W OF SH 285, Conejos, CO
Built 1992 Load: 38.1 t ADT: 57
COUNTY ROAD 10
FairOver: MONTE VISTA CANAL
JUST W OF SH 368, Conejos, CO
Built 1991 Load: 38.4 t ADT: 96
COUNTY ROAD BB
FairOver: ALAMOSA RIVER
4.7 MI W OF CR 6, Conejos, CO
Built 1989 Load: 39.8 t ADT: 30
COUNTY ROAD 17
FairOver: N. BRANCH CONEJOS RIVER
1.6 MI N OF ESPINOZA, Conejos, CO
Built 1994 Load: 40.5 t ADT: 328
COUNTY ROAD 15
FairOver: CONEJOS RIVER
2.0 MI N OF CR G, Conejos, CO
Built 1996 Load: 44.9 t ADT: 38
COUNTY ROAD E.5
FairOver: RIO SAN ANTONIO
0.9 MI S OF ANTONITO, Conejos, CO
Built 1994 Load: 50.5 t ADT: 54
COUNTY ROAD B
FairOver: RIO DE LOS PINOS
.8 MI S OF CR 12.5, Conejos, CO
Built 1993 Load: 53.2 t ADT: 82
COUNTY ROAD 15
FairOver: ALAMOSA RIVER
1.0 MI N OF SH 15, Conejos, CO
Built 2000 Load: 56.2 t ADT: 62
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.