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.

Total bridges

614

Public highway bridges in Weld County

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

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).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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.

Bridge inventory size and condition shares for Weld County and the 5 Colorado counties closest to it in inventory size
County Bridges Poor
El Paso County 686 3.2%
Weld County (this page) 614 4.7%
Larimer County 559 2%
Adams County 535 6.9%
Jefferson County 464 6.3%
Denver County 458 1.7%

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).

Similar average build year

Nearest mean year-built outside CO (1986 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 614 Good 226 Fair 359 Poor 29

Good-condition bridges (226)

US 85 ML SBND

Good

Over: LARIMER-WELD CANAL

0.7 MI S OF JCT SH 14, Weld, CO

Built 1966 Load: 34.2 t ADT: 4,250

Weld County Pkwy

Good

Over: Cache La Poudre River

0.3 Mi S of CR 60.5, Weld, CO

Built 2016 Load: 34.3 t ADT: 8,531

County Road 58

Good

Over: South Platte River

0.6 Mi E of Hemlock St, Weld, CO

Built 1990 Load: 34.5 t ADT: 8,636

I 25 ML SBND

Good

Over: WELD COUNTY ROAD 10

4.0 MI N OF WELD-ADAMS CL, Weld, CO

Built 2004 Load: 34.7 t ADT: 51,000

County Road 70

Good

Over: Lone Tree Creek

0.35 Mi E of Co Rd 43, Weld, CO

Built 1983 Load: 34.7 t ADT: 333

County Road 15

Good

Over: Big Dry Creek

0.6 Mi. N. of Co. Rd. 2, Weld, CO

Built 2003 Load: 34.8 t ADT: 86

County Road 8

Good

Over: South Platte River

1.3 Mi E of Co Rd 23, Weld, CO

Built 1994 Load: 35.3 t ADT: 151

Co Rd 29

Good

Over: Platte Valley Canal

0.5 Mi N of Co Rd 34, Weld, CO

Built 2014 Load: 35.5 t ADT: 328

SH 257 ML

Good

Over: LITTLE THOMPSON RIVER

0.2 MI N OF JCT SH 60, Weld, CO

Built 2018 Load: 35.6 t ADT: 7,400

I 25 ML NBND

Good

Over: WELD COUNTY ROAD 10

4.0 MI N OF WELD-ADAMS CL, Weld, CO

Built 2004 Load: 35.6 t ADT: 51,000

I 25 ML NBND

Good

Over: ST VRAIN RIVER

1 MILE N OF JCT 119, Weld, CO

Built 2008 Load: 35.6 t ADT: 40,000

I-25 ML SBND

Good

Over: St. VRAIN RIVER

1 MILE N OF JCT 119, Weld, CO

Built 2008 Load: 35.6 t ADT: 40,000

County Road 43

Good

Over: Lone Tree Creek

250 Ft N of Co Rd 78, Weld, CO

Built 1975 Load: 35.7 t ADT: 1,648

CR 14.5 (14TH ST)

Good

Over: South Platte River

1.3 Mi E of Co Rd 23, Weld, CO

Built 1993 Load: 35.8 t ADT: 1,952

County Road 59

Good

Over: Crow Creek

0.3 Mi N of Co Rd 64, Weld, CO

Built 2005 Load: 35.8 t ADT: 805

SH 52 ML

Good

Over: SULLIVAN CANAL

0.9 MI E OF JCT I 25, Weld, CO

Built 1960 Load: 35.9 t ADT: 18,000

County Road 57

Good

Over: Wild Horse Creek

5.2 Mi N of St Hwy 14, Weld, CO

Built 1987 Load: 36.0 t ADT: 63

County Road 58

Good

Over: Pond Adj So Platte River

0.4 Mi E of Hemlock St, Weld, CO

Built 2016 Load: 36.0 t ADT: 8,636

County Road 77

Good

Over: Willow Creek

1.0 Mi N of Co Rd 100, Weld, CO

Built 1990 Load: 36.2 t ADT: 218

US 34 ML WBND

Good

Over: 1ST AVE

0.72 MI. E OF JCT US 85, Weld, CO

Built 1975 Load: 36.4 t ADT: 8,500

County Road 61.5

Good

Over: Crow Creek

0.05 Mi N of Co Rd 68, Weld, CO

Built 2000 Load: 36.7 t ADT: 178

County Rd 64/O St.

Good

Over: Eaton Draw

0.8 Mi E of US Hwy 85, Weld, CO

Built 1995 Load: 36.7 t ADT: 564

County Road 84

Good

Over: Pierce Lateral Canal

0.7 Mi E of Co Rd 21, Weld, CO

Built 1990 Load: 36.7 t ADT: 102

County Road 23

Good

Over: Larimer and Weld Canal

At Inter with Co Rd 76, Weld, CO

Built 1995 Load: 36.9 t ADT: 2,412

County Road 70

Good

Over: Lone Tree Creek

0.45 Mi E of Co Rd 43, Weld, CO

Built 1983 Load: 36.9 t ADT: 333

US 34 ML

Good

Over: EMPIRE CANAL

15.3 MI E OF JCT SH 37, Weld, CO

Built 1983 Load: 37.5 t ADT: 6,900

County Road 18

Good

Over: South Platte River

0.7 Mi E of Co Rd 25, Weld, CO

Built 1994 Load: 37.6 t ADT: 3,971

County Road 33

Good

Over: Lone Tree Creek

0.95 Mi N of Co Rd 100, Weld, CO

Built 1984 Load: 37.8 t ADT: 162

4th St (Cr 60.5)

Good

Over: Sheep Draw

0.5 Mi E of 71st Ave, Weld, CO

Built 1992 Load: 38.0 t ADT: 8,963

SH 392 ML

Good

Over: CROW CREEK

0.8 Mi E of Co Rd 75, Weld, CO

Built 1991 Load: 38.1 t ADT: 2,700

SH 52 ML

Good

Over: KIOWA CREEK

9.7 MI E OF JCT SH 79, Weld, CO

Built 1992 Load: 38.3 t ADT: 650

County Road 86

Good

Over: Owl Creek

0.90 Mi E of Cr Rd 45, Weld, CO

Built 2001 Load: 38.3 t ADT: 28

County Road 23

Good

Over: New Cache La Poudre Cana

0.6 Mi No of Co Rd 66, Weld, CO

Built 1999 Load: 38.4 t ADT: 6,932

SH 14 ML

Good

Over: COLLINS LATERAL CANAL

3.6 MI W OF AULT, Weld, CO

Built 1957 Load: 38.5 t ADT: 8,900

I25 ML NBND

Good

Over: SH56 ML

7 MI N OF SH66, Weld, CO

Built 2022 Load: 38.6 t ADT: 7,400

County Road 35

Good

Over: Larimer and Weld Canal

0.8 Mi N of Co Rd 78, Weld, CO

Built 1992 Load: 38.8 t ADT: 437

I 25 SERVICE RD

Good

Over: LITTLE THOMPSON RIVER SR

6.7 MI NO OF JCT SH 56, Weld, CO

Built 2013 Load: 38.9 t ADT: 2,400

SH 60 ML

Good

Over: LITTLE THOMPSON RIVER

5.8 MI E OF JCT I 25, Weld, CO

Built 2019 Load: 38.9 t ADT: 9,600

County Road 49

Good

Over: Box Elder Creek

1.3 MI N of CR 22, Weld, CO

Built 2017 Load: 38.9 t ADT: 4,747

County Road 87

Good

Over: South Platte River

0.6 Mi N of Co Rd 42.5, Weld, CO

Built 2009 Load: 39.1 t ADT: 247

SH 14 ML

Good

Over: COLLINS LATERAL CANAL

6.3 MI E OF JCT SH 257, Weld, CO

Built 1957 Load: 39.2 t ADT: 8,900

County Road 61

Good

Over: Crow Creek

300 Ft N of Co Rd 68, Weld, CO

Built 2017 Load: 39.2 t ADT: 68

County Road 84

Good

Over: Collins Lateral Canal

0.5 Mi E of Co Rd 21, Weld, CO

Built 2004 Load: 39.2 t ADT: 102

County Road 96

Good

Over: Wild Horse Creek

0.95 Mi E of Co Rd 57, Weld, CO

Built 1991 Load: 39.2 t ADT: 20

County Road 80

Good

Over: Dry Wash

3.0 Mi E of Co Rd 85, Weld, CO

Built 1995 Load: 39.4 t ADT: 19

SH 14 ML

Good

Over: COLLINS LATERAL CANAL

3.5 MI W OF AULT & US85, Weld, CO

Built 1957 Load: 39.5 t ADT: 8,900

US 85 ML

Good

Over: UP RR

5 MI. S. OF GREELEY, Weld, CO

Built 1994 Load: 39.5 t ADT: 19,000

County Road 57

Good

Over: Greeley No. 2 Canal

0.5 Mi N of CR 66, Weld, CO

Built 2011 Load: 39.7 t ADT: 117

County Road 17

Good

Over: Sullivan Ditch

0.2 Mi N of Co Rd 22, Weld, CO

Built 2002 Load: 39.8 t ADT: 135

US 34 ML EBND

Good

Over: SOUTH PLATTE RIVER

1.6 MI E OF JCT SH85-G, Weld, CO

Built 1976 Load: 40.1 t ADT: 8,500

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.