Total bridges
64
Public highway bridges in Delta County
County profile · official public datasets
Delta County, CO
64 public highway bridges tracked in the FHWA National Bridge Inventory: 51.6% rated Good, 45.3% Fair, 3.1% Poor.
- 64
- Public bridges
- 51.6%
- Good condition
- 3.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Delta County posts a better-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- Top 36%
- lowest Poor share in state
- 3.1%
- Poor-condition share
- 64
- public highway bridges
- 1986
- 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.
Delta County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Delta County ranks #23 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.1%). Delta County, Colorado contains 64 public highway bridges. Roughly 51.6% are rated “Good,” 45.3% “Fair,” and 3.1% “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
51.6%
33 of 64 rated 7-9
Fair condition
45.3%
29 of 64 rated 5-6
Poor condition
3.1%
2 of 64 rated 4 or below
In-state Poor-share rank
#23 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 64 NBI-tracked bridges by lowest applicable component rating.
Good 51.6% (33)
Fair 45.3% (29)
Poor 3.1% (2)
Delta County's Poor-condition bridges carry 278 vehicle crossings a day
That is 0.2% of the county's reported daily bridge traffic on 3.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 139 crossings a day against 1,464 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 64 of 64 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
20.3% of Delta County's bridges have passed the 50-year mark
13 of the 64 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 51.6% 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 96% of the county's Poor-condition bridge traffic
CR J25 (Fairview) over TONGUE CREEK, built 1984, carries 267 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 2-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 278 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Delta County's bridges were built
64 bridges with a recorded construction year, grouped by decade
- 1930s 2
1930–1939
2 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s 4
1950–1959
4 bridges
- 1960s 2
1960–1969
2 bridges
- 1970s 6
1970–1979
6 bridges
- 1980s
1980–1989
20 bridges
- 1990s
1990–1999
14 bridges
- 2000s 7
2000–2009
7 bridges
- 2010s 6
2010–2019
6 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1980s, when 20 of the county's bridges still in the inventory were built, which is 31.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1986) matches the Colorado average (1982).
How Delta County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Delta County in number of bridges, with their condition splits. Its 3.1% Poor share is the 4th-lowest of these 6. Its average build year of 1986 against a peer-group mean of 1984 is in line with the group.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Broomfield County | 66 | 42.4% | 56.1% | 1.5% | 2000 |
| Sedgwick County | 64 | 40.6% | 57.8% | 1.6% | 1981 |
| Delta County (this page) | 64 | 51.6% | 45.3% | 3.1% | 1986 |
| Conejos County | 62 | 38.7% | 46.8% | 14.5% | 1976 |
| Pitkin County | 62 | 38.7% | 58.1% | 3.2% | 1985 |
| Cheyenne County | 61 | 57.4% | 42.6% | 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 Delta 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 Delta County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (64 bridges here).
- Southeast Fairbanks County, AK · 64 bridges
- Hancock County, GA · 64 bridges
- Jefferson County, GA · 64 bridges
- Lamar County, GA · 64 bridges
Similar average build year
Nearest mean year-built outside CO (1986 here).
- El Paso County, TX · avg 1986 · 783 bridges
- Caddo County, LA · avg 1986 · 682 bridges
- Polk County, IA · avg 1986 · 545 bridges
- Canadian County, OK · avg 1986 · 493 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (29)
CR 4110
FairOver: NORTH FORK GUNNISON RVR
1.6 MI NE OF PAONIA, Delta, CO
Built 1930 Load: 9.7 t ADT: 310
COUNTY ROAD 4405
FairOver: FIRE MOUNTAIN CANAL
2 Mi NE of SH133/Bowie RD, Delta, CO
Built 1976 Load: 13.2 t ADT: 38
COUNTY ROAD 1975
FairOver: TONGUE CREEK
.2 MI E OF TRAP CLUB RD, Delta, CO
Built 1984 Load: 15.6 t ADT: 152
COUNTY ROAD 3850
FairOver: SMITH FORK
1.2 MI W OF CRAWFORD, Delta, CO
Built 1985 Load: 15.7 t ADT: 498
SH 133 ML
FairOver: ROOTCAP CREEK
2 MI SW OF PAONIA EXIT, Delta, CO
Built 1949 Load: 15.8 t ADT: 3,400
FDR 125
FairOver: WEST FORK SURFACE CREEK
10 MI NNE OF CEDAREDGE, Delta, CO
Built 1984 Load: 15.9 t ADT: 169
SH 92 ML
FairOver: N FK GUNNISON RIVER
0.3 MI SE OF HOTCHKISS, Delta, CO
Built 1966 Load: 19.3 t ADT: 2,900
SH 133 FRONTAGE RD
FairOver: HUBBARD CREEK
ORIG 133 NEAR BOWIE, Delta, CO
Built 1937 Load: 20.5 t ADT: 10
COUNTY ROAD 3400
FairOver: SMITH FORK
.7 MI S GRANDVIEW MESA RD, Delta, CO
Built 1973 Load: 20.7 t ADT: 71
COUNTY ROAD O.90
FairOver: NORTH FORK GUNNISON RVR
W ENTRANCE TO PAONIA, Delta, CO
Built 1984 Load: 22.4 t ADT: 4,267
COUNTY ROAD 1800
FairOver: SURFACE CREEK
.2 MI E OF 2375 RD, Delta, CO
Built 1985 Load: 22.6 t ADT: 368
SH 133 FRONTAGE RD
FairOver: FIRE MOUNTAIN CANAL
ORIG 133 NEAR BOWIE, Delta, CO
Built 1970 Load: 27.9 t ADT: 10
US 50 ML EBND
FairOver: GUNNISON RIVER
IN DELTA, Delta, CO
Built 1966 Load: 28.2 t ADT: 6,500
HUBBARD CANYON
FairOver: WEST MUDDY CREEK
27 MI N OF PAONIA, Delta, CO
Built 1984 Load: 28.5 t ADT: 29
STUCKER MESA ROAD
FairOver: FIRE MOUNTAIN CANAL
.6 MI NW OF SH 133, Delta, CO
Built 1983 Load: 32.7 t ADT: 160
COUNTY ROAD 4110
FairOver: MINNESOTA CREEK
.1 MI EAST OF OAK ST, Delta, CO
Built 1988 Load: 35.4 t ADT: 373
SH 65 ML
FairOver: GUNNISON RIVER
5 MI E OF DELTA, Delta, CO
Built 1980 Load: 35.5 t ADT: 7,000
COUNTY ROAD 3100
FairOver: LEROUX CREEK
5.4 MI N OF SH 92, Delta, CO
Built 1984 Load: 38.7 t ADT: 159
BUZZARD DIVIDE ROA
FairOver: WEST MUDDY CREEK
17 MI. NNE PAONIA, Delta, CO
Built 1951 Load: 39.2 t ADT: 96
Grand Avenue
FairOver: NORTH FORK GUNNISON RVR
0.4 MI S OF JCT SH 133, Delta, CO
Built 1955 Load: 41.8 t ADT: 2,165
COUNTY ROAD U50
FairOver: SURFACE CREEK
1.7 MI W OF SH 65, Delta, CO
Built 1994 Load: 44.4 t ADT: 106
SH 65 ML
FairOver: SURFACE CREEK
3.4 MI N OF ORCHARD CITY, Delta, CO
Built 1957 Load: 44.5 t ADT: 5,700
COUNTY ROAD 3300
FairOver: LEROUX CREEK
.8 MI N OF SH 92, Delta, CO
Built 1984 Load: 47.3 t ADT: 79
Confluence Dr.
FairOver: RR Spur
0.4 Mi W of SH50, Delta, CO
Built 2013 Load: 47.3 t ADT: 5,474
US 50 ML
FairOver: POINT CREEK
10.0 MI SE OF MESA-DELTA, Delta, CO
Built 1977 Load: 53.3 t ADT: 9,300
US 50 ML
FairOver: WELLS GULCH
3.5 MI S OF MESA COUNTY L, Delta, CO
Built 1955 Load: 58.1 t ADT: 9,800
CR/N75 NOEL RD
FairOver: SURFACE CREEK
.1 MI W OF SH 65, Delta, CO
Built 1988 Load: 63.6 t ADT: 167
SH 92
FairOver: SMITH CREEK
Just S OF CRAWFORD, Delta, CO
Built 2006 Load: 71.3 t ADT: 1,000
SH 133 ML
FairOver: JAY CREEK
2 MI NE OF HOTCHKISS, Delta, CO
Built 1949 Load: 90.4 t ADT: 4,500
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.