Total bridges
614
Public highway bridges in Weld County
County profile · official public datasets
Weld County, CO
614 public highway bridges tracked in the FHWA National Bridge Inventory: 36.8% rated Good, 58.5% Fair, 4.7% Poor.
- 614
- Public bridges
- 36.8%
- Good condition
- 4.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Weld County posts a better-than-median Poor-condition share among rated counties in the state across large county bridge inventory.
- Top 50%
- lowest Poor share in state
- 4.7%
- Poor-condition share
- 614
- 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.
Weld County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Weld County ranks #32 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.7%). Weld County, Colorado contains 614 public highway bridges. Roughly 36.8% are rated “Good,” 58.5% “Fair,” and 4.7% “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
36.8%
226 of 614 rated 7-9
Fair condition
58.5%
359 of 614 rated 5-6
Poor condition
4.7%
29 of 614 rated 4 or below
In-state Poor-share rank
#32 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 614 NBI-tracked bridges by lowest applicable component rating.
Good 36.8% (226)
Fair 58.5% (359)
Poor 4.7% (29)
Weld County's Poor-condition bridges carry 120,310 vehicle crossings a day
That is 3.1% of the county's reported daily bridge traffic on 4.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 4,149 crossings a day against 8,457 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 614 of 614 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
30.5% of Weld County's bridges have passed the 50-year mark
187 of the 614 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 36.8% 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 13.7% of the county's Poor-condition bridge traffic
US 34 ML WBND over US 85 BUS RT, built 1962, carries 16,500 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 29-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 120,310 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Weld County's bridges were built
614 bridges with a recorded construction year, grouped by decade
- 1930s 9
1930–1939
9 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s 39
1950–1959
39 bridges
- 1960s
1960–1969
101 bridges
- 1970s 53
1970–1979
53 bridges
- 1980s
1980–1989
96 bridges
- 1990s
1990–1999
135 bridges
- 2000s
2000–2009
98 bridges
- 2010s 51
2010–2019
51 bridges
- 2020s 27
2020–2029
27 bridges
What this shows Construction peaked in the 1990s, when 135 of the county's bridges still in the inventory were built, which is 22% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1986) matches the Colorado average (1982).
How Weld County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Weld County in number of bridges, with their condition splits. Its 4.7% Poor share is the 4th-lowest of these 6. Its average build year of 1986 against a peer-group mean of 1987 is in line with the group.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| El Paso County | 686 | 31.3% | 65.5% | 3.2% | 1984 |
| Weld County (this page) | 614 | 36.8% | 58.5% | 4.7% | 1986 |
| Larimer County | 559 | 49% | 49% | 2% | 1987 |
| Adams County | 535 | 43.9% | 49.2% | 6.9% | 1990 |
| Jefferson County | 464 | 33.8% | 59.9% | 6.3% | 1984 |
| Denver County | 458 | 41.9% | 56.3% | 1.7% | 1991 |
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 Weld 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 Weld County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (614 bridges here).
- Monroe County, NY · 615 bridges
- Allen County, IN · 613 bridges
- Mobile County, AL · 612 bridges
- Contra Costa County, CA · 618 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 (359)
US 85 ML NBND
FairOver: SOUTH PLATTE RIVER
EVANS, Weld, CO
Built 1936 Load: 27.2 t ADT: 12,500
SH 52 ML
FairOver: DENVER HUDSON CANAL
5 MI E OF JCT I-76, Weld, CO
Built 1953 Load: 27.2 t ADT: 2,900
I 76 ML EBND
FairOver: I 76 BUSS RT
7.3 MI NE OF JCT SH 52, Weld, CO
Built 1961 Load: 27.2 t ADT: 8,000
County Road 4
FairOver: Denver Hudson Canal
0.5 Mi E of Co Rd 45, Weld, CO
Built 2003 Load: 27.2 t ADT: 54
County Road 13
FairOver: Little Thompson River
0.4 Mi N of Co Rd 44, Weld, CO
Built 1966 Load: 27.2 t ADT: 4,115
US 85 ML NBND
FairOver: CO.RD 39.5 UP RR
IN GREELEY, Weld, CO
Built 1962 Load: 27.3 t ADT: 4,750
County Road 38
FairOver: Mead Lateral Ditch
1.4 Mi E of Co Rd 7, Weld, CO
Built 1965 Load: 27.4 t ADT: 63
County Road 59
FairOver: Crow Creek
0.4 Mi N of Co Rd 60.5, Weld, CO
Built 1965 Load: 27.5 t ADT: 322
County Road 19
FairOver: Big Dry Creek
0.9 Mi N of Co Rd 4, Weld, CO
Built 1984 Load: 27.7 t ADT: 1,326
SH 119 S/WBND
FairOver: ST VRAIN CREEK
1.1 MI W OF JCT I 25, Weld, CO
Built 1973 Load: 27.8 t ADT: 15,500
County Road 70
FairOver: New Cache La Poudre Cana
0.5 Mi E of Co Rd 43, Weld, CO
Built 1994 Load: 27.8 t ADT: 333
County Road 86
FairOver: Collins Lateral Canal
0.6 Mi E of Co Rd 29, Weld, CO
Built 1990 Load: 27.8 t ADT: 100
SH 14 ML
FairOver: CROW CREEK
0.3 MI W OF 392 BRIGSDAL, Weld, CO
Built 1967 Load: 27.9 t ADT: 2,300
County Road 45
FairOver: Lone Tree Creek
0.6 Mi N of St Hwy 392, Weld, CO
Built 1976 Load: 27.9 t ADT: 133
County Road 386
FairOver: Empire Intake Canal
1.4 Mi S of US Hwy 34, Weld, CO
Built 1984 Load: 27.9 t ADT: 148
SH 52 ML
FairOver: DENVER HUDSON CANAL
6.4 MI E OF JCT I-76, Weld, CO
Built 1953 Load: 28.0 t ADT: 2,900
I 25 ML SBND
FairOver: GW RR
4.4 MI SO OF JCT SH 56, Weld, CO
Built 1961 Load: 28.1 t ADT: 36,000
I 25 ML NBND
FairOver: GW RR
2.6 MI NO OF JCT SH 66, Weld, CO
Built 1961 Load: 28.1 t ADT: 36,000
County Road 39
FairOver: Larimer and Weld Canal
0.8 Mi N of Co Rd 80, Weld, CO
Built 1954 Load: 28.1 t ADT: 2,253
County Road 36
FairOver: Evans Ditch No. 2
0.6 Mi E of Co Rd 29, Weld, CO
Built 1985 Load: 28.2 t ADT: 76
I 25 ML NBND
FairOver: COUNTY ROAD
6.2 MI NO OF JCT SH 66, Weld, CO
Built 1961 Load: 28.3 t ADT: 36,000
I 25 ML SBND
FairOver: COUNTY ROAD 32
6 MI SO OF JCT SH 56, Weld, CO
Built 1961 Load: 28.3 t ADT: 37,000
I 25 ML NBND
FairOver: COUNTY ROAD 32
1 MI NO OF JCT SH 66, Weld, CO
Built 1961 Load: 28.3 t ADT: 37,000
County Road 51
FairOver: Owl Creek Canal
1.96 Mi N of Co Rd 76, Weld, CO
Built 1999 Load: 28.3 t ADT: 968
County Road 43
FairOver: Lone Tree Creek
0.25 Mi N of Co Rd 70, Weld, CO
Built 1981 Load: 28.4 t ADT: 572
County Road 76
FairOver: Larimer and Weld Canal
0.5 Mi E of Co Rd 31, Weld, CO
Built 1980 Load: 28.4 t ADT: 79
County Road 76
FairOver: Owl Creek Canal
0.2 Mi E of Co Rd 53, Weld, CO
Built 1998 Load: 28.4 t ADT: 103
County Road 67
FairOver: Simpson Creek
0.9 Mi N of Co Rd 128, Weld, CO
Built 1990 Load: 28.5 t ADT: 23
COUNTY ROAD 126
FairOver: I 25 ML
6.3 MI S OF WYOMING S.L., Weld, CO
Built 1963 Load: 28.6 t ADT: 1,007
59th Avenue
FairOver: Cache La Poudre River
1.2 Mi N of 4th Street, Weld, CO
Built 1997 Load: 28.6 t ADT: 7,309
County Road 22
FairOver: Sullivan Ditch
1.0 Mi E of Co Rd 19, Weld, CO
Built 1993 Load: 28.6 t ADT: 151
County Road 23
FairOver: Big Dry Creek
0.8 Mi N of Co Rd 6, Weld, CO
Built 1995 Load: 28.6 t ADT: 682
County Road 77
FairOver: Geary Creek
0.4 Mi N of Co Rd 106, Weld, CO
Built 1990 Load: 28.7 t ADT: 204
County Road 23
FairOver: Little Dry Creek
0.5 Mi N of Co Rd 14, Weld, CO
Built 1997 Load: 28.8 t ADT: 287
County Road 41
FairOver: New Cache La Poudre Cana
0.2 Mi N of St Hwy 392, Weld, CO
Built 1993 Load: 28.8 t ADT: 161
County Road 49
FairOver: Owl Creek Canal
0.4 Mi N of Co Rd 76, Weld, CO
Built 1982 Load: 28.8 t ADT: 134
County Road 62.5
FairOver: Lone Tree Creek
0.7 Mi E of Co Rd 49, Weld, CO
Built 1986 Load: 28.8 t ADT: 41
County Road 73
FairOver: Sand Creek
0.6 Mi N of Co Rd 18, Weld, CO
Built 2014 Load: 28.8 t ADT: 951
County Road 45
FairOver: Larimer and Weld Canal
0.2 Mi N of Co Rd 84, Weld, CO
Built 1990 Load: 28.9 t ADT: 37
US 34 ML EBND
FairOver: 1ST AVE
0.71 MI E OF JCT US 85, Weld, CO
Built 1975 Load: 29.0 t ADT: 8,500
County Road 24.5
FairOver: Platte Valley Canal
50 Ft E of Co Rd 25.5, Weld, CO
Built 2010 Load: 29.1 t ADT: 93
SH 52 ML
FairOver: I 25 ML
6.5 MI E OF JCT US 287, Weld, CO
Built 1999 Load: 29.2 t ADT: 18,000
County Road 80
FairOver: Crow Creek
0.1 Mi E of Co Rd 392, Weld, CO
Built 1993 Load: 29.2 t ADT: 129
County Road 50
FairOver: Empire Intake Canal
0.5 Mi E of Co Rd 65, Weld, CO
Built 1978 Load: 29.3 t ADT: 84
County Road 86
FairOver: Collins Lateral Canal
0.2 Mi E of Co Rd 33, Weld, CO
Built 2006 Load: 29.3 t ADT: 101
County Road 62
FairOver: Sand Creek
0.7 Mi E CR 43/N Airport, Weld, CO
Built 1995 Load: 29.5 t ADT: 185
County Road 43
FairOver: Lone Tree Creek
0.35 Mi N of Co Rd 70, Weld, CO
Built 1998 Load: 29.5 t ADT: 579
I 25 ML NBND
FairOver: LONE TREE CREEK
0.7 MI S OF WYOMING S.L., Weld, CO
Built 1963 Load: 29.7 t ADT: 10,000
I 25 ML SBND
FairOver: LONE TREE CREEK
0.6 MI S OF WYOMING S.L., Weld, CO
Built 1963 Load: 29.7 t ADT: 10,000
County Road 45
FairOver: Neres Canal
0.4 Mi North of Co Rd 8, Weld, CO
Built 1998 Load: 29.8 t ADT: 100
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.