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

Poor-condition bridges (29)

County Road 3

Poor

Over: Sullivan Ditch

0.7 Mi N of Co Rd 12, Weld, CO

Built 1989 Load: 15.1 t ADT: 2,243

CR 12 (Grand View)

Poor

Over: Stanley Lateral Ditch

0.3 Mi East of Co Rd 13, Weld, CO

Built 1976 Load: 17.1 t ADT: 1,507

37th Street

Poor

Over: Loveland Greeley Canal

0.3 Mi E of 83rd Ave, Weld, CO

Built 1994 Load: 18.2 t ADT: 4,671

COUNTY ROAD 4

Poor

Over: I 76 ML BNSF RR

2.8 MILES NE OF JCT SH 7, Weld, CO

Built 1981 Load: 18.7 t ADT: 885

County Road 4

Poor

Over: Neres Canal

0.5 Mi E of Hwy I-76, Weld, CO

Built 1994 Load: 18.9 t ADT: 1,455

County Road 20

Poor

Over: Sullivan Ditch

0.7 Mi E of Co Rd 15, Weld, CO

Built 1994 Load: 19.5 t ADT: 3,128

County Road 34

Poor

Over: Supply Ditch

1.7 Mi E. of Co Rd 1, Weld, CO

Built 1937 Load: 21.1 t ADT: 3,223

County Road 44

Poor

Over: Gilmore Ditch

0.7 Mi E of Co Rd 51, Weld, CO

Built 1981 Load: 23.6 t ADT: 2,095

County Road 72

Poor

Over: New Cache La Poudre Cana

0.8 Mi E of Co Rd 47, Weld, CO

Built 1960 Load: 23.9 t ADT: 62

SH 14 ML

Poor

Over: EATON DITCH

2.4 MI E OF US85 AT AULT, Weld, CO

Built 1941 Load: 24.4 t ADT: 2,400

Main St (CR 37.5)

Poor

Over: Union Ditch

0.7 Mi N of Weld CR 39, Weld, CO

Built 1950 Load: 24.5 t ADT: 2,205

County Road 54

Poor

Over: Big Thompson River

0.7 Mi E of Co Rd 13, Weld, CO

Built 1978 Load: 24.5 t ADT: 7,403

I 76 SERVICE RD

Poor

Over: LOST CREEK SR

JUST E OF ROGGEN, Weld, CO

Built 1936 Load: 25.1 t ADT: 135

County Road 24

Poor

Over: Lupton Bottom Ditch

1.4 Mi E of Co Rd 19, Weld, CO

Built 1993 Load: 25.9 t ADT: 1,588

County Road 4

Poor

Over: Beebe Seep Canal

0.5 MI E of Co Rd 37, Weld, CO

Built 1996 Load: 26.6 t ADT: 1,311

County Road 4

Poor

Over: Denver Hudson Canal

0.1 Mi E of Co Rd 41, Weld, CO

Built 1996 Load: 27.8 t ADT: 1,382

US 34 ML EBND

Poor

Over: RAMP TO US85 SB 8TH AVE

AT JCT US85, Weld, CO

Built 1968 Load: 27.9 t ADT: 15,000

County Road 91

Poor

Over: Empire Intake Canal

1.3 Mi S of US Hwy 34, Weld, CO

Built 1970 Load: 28.0 t ADT: 77

US 34 EB

Poor

Over: UP RR

S. SIDE OF GREELEY, Weld, CO

Built 1962 Load: 28.1 t ADT: 16,500

US 85 ML SBND

Poor

Over: SOUTH PLATTE RIVER

S. EDGE OF EVANS, Weld, CO

Built 1955 Load: 29.5 t ADT: 12,500

SH 52 ML

Poor

Over: DENVER HUDSON CANAL

3.5 MI E OF JCT I-76, Weld, CO

Built 1952 Load: 30.0 t ADT: 2,900

US 85 BYPASS SBND

Poor

Over: US 85 BUSS RT

IN GREELEY, Weld, CO

Built 1962 Load: 30.6 t ADT: 4,750

County Road 60.5

Poor

Over: Lone Tree Creek

4.7 MI E OF JCT US 85 BYP, Weld, CO

Built 1967 Load: 30.6 t ADT: 749

Railroad Drive

Poor

Over: Union Ditch

500 Ft S of W Taylor Ave, Weld, CO

Built 1930 Load: 32.7 t ADT: 202

County Road 33

Poor

Over: New Cache La Poudre Cana

50 Ft No of St Hwy 392, Weld, CO

Built 1971 Load: 32.7 t ADT: 2,877

County Road 34

Poor

Over: St. Vrain Creek

0.3 Mi E of Co Rd 17, Weld, CO

Built 1960 Load: 32.7 t ADT: 1,258

County Road 76.5

Poor

Over: Larimer and Weld Canal

30 Ft W of Co Rd 23, Weld, CO

Built 1930 Load: 32.7 t ADT: 304

US 85 ML NBND

Poor

Over: CACHE LA POUDRE RIVER

N. EDGE OF GREELEY, Weld, CO

Built 1962 Load: 32.8 t ADT: 11,000

US 34 ML WBND

Poor

Over: US 85 BUS RT

IN EVANS, Weld, CO

Built 1962 Load: 34.7 t ADT: 16,500

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

Related

Browse all → | Rankings →
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.