State profile · Below median Poor share

Colorado bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Colorado.

8,965
Public bridges
35.7%
Good condition
4.8%
Poor condition

Colorado holds 8,965 public highway bridges (#27 of 52 by inventory) with a 4.82% Poor share (#34 of 52 by Poor share).

That is 4.8% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 19 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

8,965

Public highway bridges in Colorado

Good Condition

35.7%

3,197 bridges rated 7-9

-14.3pp vs 50% benchmark

Poor Condition

4.8%

432 bridges whose lowest applicable component is rated 0-4

-2.7pp vs national avg 7.5%

Colorado vs national bridge condition

Colorado - Good condition share 35.7%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Colorado - Poor-condition share 16.1%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Colorado in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Colorado has 8,965 bridges and a 4.8% Poor-condition share in the 2024 NBI, rank #19 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Colorado has 8,965 bridges and a 4.8% Poor-condition share in the 2024 NBI, rank #19 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Colorado vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

8,965 27th of 54 higher than 27 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Colorado

The highlighted point is Colorado: 8,965 bridges and 4.82% in Poor condition, rank #19 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Colorado on that same Poor-share ordering:

  • Connecticut: 4,365 bridges · 4.72% Poor
  • Ohio: 26,729 bridges · 4.74% Poor
  • Colorado: 8,965 bridges · 4.82% Poor
  • Idaho: 4,616 bridges · 4.90% Poor
  • Indiana: 19,495 bridges · 5.22% Poor

The full national sortable table lives on the rankings page.

Material families in Colorado

Exclusive FHWA material families across all 8,965 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Colorado’s inventory

State agency holds 38.8% of the 8,965 public highway bridges filed under Colorado in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Colorado’s bridges were built

Pre-1950 construction accounts for 8.5% of the 8,965 bridges with a recorded original year in Colorado. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Colorado35.7%59.5%GoodFairPoor
Bridge inventory deck-condition mix - Colorado (FHWA NBI)

Counties (64)

Adams 535 Alamosa 16 Arapahoe 391 Archuleta 44 Baca 106 Bent 68 Boulder 311 Broomfield 66 Chaffee 84 Cheyenne 61 Clear Creek 77 Conejos 62 Costilla 39 Crowley 28 Custer 20 Delta 64 Denver 458 Dolores 28 Douglas 263 Eagle 174 El Paso 686 Elbert 85 Fremont 137 Garfield 167 Gilpin 19 Grand 88 Gunnison 100 Hinsdale 31 Huerfano 94 Jackson 47 Jefferson 464 Kiowa 31 Kit Carson 130 La Plata 102 Lake 17 Larimer 559 Las Animas 207 Lincoln 129 Logan 182 Mesa 319 Mineral 26 Moffat 80 Montezuma 61 Montrose 118 Morgan 192 Otero 195 Ouray 39 Park 55 Phillips 27 Pitkin 62 Prowers 137 Pueblo 264 Rio Blanco 54 Rio Grande 71 Routt 96 Saguache 41 San Juan 13 San Miguel 59 Sedgwick 64 Summit 57 Teller 27 Washington 75 Weld 614 Yuma 49

Colorado vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Colorado on the same metric.

CT

Connecticut

4.72% top marginal rate
Structure
Progressive
Burden @ $100K
$4,365

OH

Ohio

4.74% top marginal rate
Structure
Progressive
Burden @ $100K
$26,729
Selected

CO

Colorado

4.82% top marginal rate
Structure
Progressive
Burden @ $100K
$8,965

ID

Idaho

4.90% top marginal rate
Structure
Progressive
Burden @ $100K
$4,616

IN

Indiana

5.22% top marginal rate
Structure
Progressive
Burden @ $100K
$19,495

Bridges Needing Most Attention in Colorado

Six lowest-condition bridges in Colorado, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

144TH AVENUE

Poor

Over: LOST CREEK

1.2 MILES WEST OF SH 79, Adams, CO

Built 1960 Load: 0.0 t

County Road 79.0

Poor

Over: Salado Creek

2.8 Mi N of CR 64, Las Animas, CO

Built 2020 Load: 0.0 t ADT: 2

County Road 59

Poor

Over: N. Sterling Outlet Canal

0.3 Mi N of Co Rd 58, Logan, CO

Built 1940 Load: 1.4 t ADT: 6

COTTONWOOD ST

Poor

Over: NORTH CRESTONE CREEK

IN TOWN OF CRESTONE, Saguache, CO

Built 1991 Load: 2.3 t ADT: 65

CO Rd 32

Poor

Over: Feeder Ditch

0.28 MI E of Co Rd 75, Las Animas, CO

Built 1970 Load: 2.7 t ADT: 7

POTOMAC STREET

Poor

Over: OBRIAN CANAL

0.2 MILE NORTH OF SH 2, Adams, CO

Built 1940 Load: 3.8 t ADT: 190

All Bridges in Colorado

SB I-25 Offramp

Good

Over: LRT

I-25/Evans in Denver, Denver, CO

Built 2006 Load: 41.5 t ADT: 101,000

SB I-25 Ramp

Good

Over: LRT

I-25 N of Belleview, Denver, CO

Built 2005 Load: 41.5 t ADT: 111,500

GRANDVIEW AVE.

Good

Over: OIL CREEK DITCH

WEST OF MACKENZIE AVE, Fremont, CO

Built 1996 Load: 41.5 t ADT: 1,730

County Road 204

Good

Over: Clear Creek Ditch

2.3 Mi No of Co Road 202, Garfield, CO

Built 1992 Load: 41.5 t ADT: 426

I 25 ML

Good

Over: UPPER LAKE GULCH RD

1.0 MI N OF LARKSPUR, Douglas, CO

Built 2021 Load: 41.5 t ADT: 66,000

SIMMS STREET

Good

Over: WEAVER CREEK

0.1 MI SOUTH OF QUINCY, Jefferson, CO

Built 2000 Load: 41.5 t ADT: 16,238

US 287 ML

Good

Over: Lone Wolf Canal

15.1 MI N OF US 50, Kiowa, CO

Built 2003 Load: 41.5 t ADT: 3,100

SKY RIDGE AVE.

Good

Over: I25 ML

0.4 MI S OF LINCOLN AVE, Douglas, CO

Built 2018 Load: 41.5 t ADT: 4

RIVA RIDGE DR

Good

Over: SULPHUR GULCH

0.2 MILES S OF MAIN ST, Douglas, CO

Built 1988 Load: 41.5 t ADT: 1,247

CR 56.6/Hopi Trail

Good

Over: Greeley Loveland Ditch

0.4 MI W OF CO RD 15, Weld, CO

Built 2002 Load: 41.5 t ADT: 151

County Road 58

Good

Over: South Platte River

0.6 Mi E of Hemlock St, Weld, CO

Built 2016 Load: 41.5 t ADT: 8,581

HOV RAMP

Good

Over: I 25 NBND R

HOV RAMP OVER I25 NBND, Denver, CO

Built 1993 Load: 41.6 t ADT: 1,547

I-25 SB On Ramp

Good

Over: LRT

SB On-ramp at Emerson St, Denver, CO

Built 2005 Load: 41.6 t ADT: 98,000

6TH STREET

Good

Over: BLUE RIVER

AT INTERSECTION WITH SH 9, Summit, CO

Built 1981 Load: 41.6 t ADT: 2,091

COUNTY ROAD 8

Good

Over: MINERAL CREEK

0.2 MI W OF US 550, San Juan, CO

Built 1993 Load: 41.6 t ADT: 199

COUNTY ROAD 16R

Good

Over: DISAPPOINTMENT CREEK

1.5 MI S OF SH 141, San Miguel, CO

Built 1992 Load: 41.6 t ADT: 1

Hopi Trail

Good

Over: Greeley Loveland Ditch

0.6 Mi North of Cr 56, Weld, CO

Built 2002 Load: 41.6 t ADT: 167

Ramp A

Good

Over: Cherry Creek

5.13 MI FROM I 25, Douglas, CO

Built 1990 Load: 41.7 t ADT: 8,200

US 50 ML

Good

Over: CLAY CREEK

4.7 MI EAST OF LAMAR, Prowers, CO

Built 1966 Load: 41.7 t ADT: 2,600

Tenth Street

Good

Over: White River

500 Ft So of Water St, Rio Blanco, CO

Built 1998 Load: 41.7 t ADT: 1,443

SOUTH RIVER RD

Good

Over: IRONSTONE CANAL

2.5 MI W OF SH50, Montrose, CO

Built 2010 Load: 41.8 t ADT: 474

County Road 129

Good

Over: Big Creek

7.3 Mi. N. of U.S. 40, Routt, CO

Built 1999 Load: 41.8 t ADT: 2,652

80TH AVENUE

Good

Over: LOST CREEK TRIBUTARY

0.1 MI E OF CONVERSE RD, Adams, CO

Built 1993 Load: 41.8 t ADT: 32

COUNTY ROAD 50

Good

Over: W BIJOU CREEK

.3 MI WEST OF CO RD 181, Arapahoe, CO

Built 1992 Load: 41.8 t ADT: 43

CASCADE AVENUE

Good

Over: CHEYENNE RUN

S OF DORCHESTER DRIVE, El Paso, CO

Built 2020 Load: 41.8 t ADT: 1,461

QUEBEC STREET

Good

Over: I-270

0.34 MI N OF JCT I-70, Denver, CO

Built 2005 Load: 41.8 t ADT: 48,188

RIO GRANDE AVENUE

Good

Over: PLUM CREEK

1.2 MI W OF HIGHWAY 67, Douglas, CO

Built 2004 Load: 41.8 t ADT: 505

MESA RIDGE PARKWAY

Good

Over: TRIB. JIMMY CAMP CREEK

0.2 MI W OF MARKSHEFFEL, El Paso, CO

Built 2018 Load: 41.8 t ADT: 7,662

I 70 ML EBND

Good

Over: HILLSIDE

BTWN GRIZLY CK & WST END, Garfield, CO

Built 1986 Load: 41.8 t ADT: 8,500

SH 88 ML/ARAP RD

Good

Over: CHERRY CREEK

0.6 MI W OF SH 83, Arapahoe, CO

Built 2015 Load: 41.8 t ADT: 60,000

MONUMENT ROAD

Good

Over: NO THOROUGHFARE CANYON

.7 MI N OF COUNTY ROAD C, Mesa, CO

Built 1996 Load: 41.8 t ADT: 5,120

SH 133 ML

Good

Over: N FORK GUNNISON RIVER

7.5 MI N OF PAONIA, Delta, CO

Built 1991 Load: 41.8 t ADT: 1,500

County Road 15

Good

Over: Little Thompson River

0.7 Mi N of Co Rd 44, Weld, CO

Built 1989 Load: 41.8 t ADT: 311

COUNTY ROAD 15

Good

Over: CASTLE CREEK

9 MI SOUTH OF HWY 82, Pitkin, CO

Built 2020 Load: 41.8 t ADT: 377

HAMILTON PL

Good

Over: SOUTH PLATTE RIVER

.2 MI W OF SANTA FE, Arapahoe, CO

Built 2017 Load: 41.8 t ADT: 1,811

N 81st St (Cr 31)

Good

Over: Left Hand Creek

0.1 M N of Oxford Rd (26), Boulder, CO

Built 1992 Load: 41.9 t ADT: 182

CR56/UP LAKE GULCH

Good

Over: EAST PLUM CREEK

0.2 MI W OF I-25, Douglas, CO

Built 1996 Load: 41.9 t ADT: 782

SWEET ROAD

Good

Over: BIG SANDY CREEK TRIB

0.3 MI E OF LOG ROAD, El Paso, CO

Built 1998 Load: 41.9 t ADT: 104

I 70 ML EBND

Good

Over: WINSLOW ROAD

1 MI. E. OF EDWARDS, Eagle, CO

Built 1971 Load: 41.9 t ADT: 17,000

VAIL VALLEY DR

Good

Over: GORE CREEK

0.01 MI S OF FRONTAGE RD, Eagle, CO

Built 1995 Load: 41.9 t ADT: 1,338

E-470 SB

Good

Over: Ramp B

20.13 MI FROM I25, Arapahoe, CO

Built 2006 Load: 42.0 t ADT: 18,529

SH 470 ML EBND

Good

Over: DUTCH CREEK

0.5 MI S. OF BOWLES, Jefferson, CO

Built 1988 Load: 42.0 t ADT: 29,000

COUNTY RD 43.7

Good

Over: NAVRICIO CREEK

3.7 MI SW OF AGUILAR, Las Animas, CO

Built 1994 Load: 42.0 t ADT: 177

County Road 62

Good

Over: N Sterling Outlet Canal

0.5 Mi E of Co Rd 63, Logan, CO

Built 2002 Load: 42.0 t ADT: 13

BIG CIMARRON RD

Good

Over: CIMARRON DITCH

8.6 MI S SH 50, Montrose, CO

Built 2020 Load: 42.1 t ADT: 192

PROSPECT ROAD

Good

Over: I 25 ML

PROSPECT RD/I25, Larimer, CO

Built 2021 Load: 42.1 t ADT: 17,469

I 76 ML WBND

Good

Over: FARM ROAD

2.5 MI SW OF STERLING EXT, Logan, CO

Built 2003 Load: 42.1 t ADT: 4,250

Sheridan Pkwy NB

Good

Over: Local Drainage

0.7 Mi W of Lowell, Broomfield, CO

Built 2009 Load: 42.1 t ADT: 5,409

Sheridan Pkwy SB

Good

Over: Local Drainage

0.7 Mi W of Lowell, Broomfield, CO

Built 2009 Load: 42.1 t ADT: 5,192

I-25 ML NBND

Good

Over: UPRR/FUTURE KENDALL PWY

1.0 MI N OF US34, Weld, CO

Built 2022 Load: 42.1 t ADT: 38,000

Showing 7,551-7,600 of 8,965 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

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

What to do with this

Use Colorado's inventory picture to drill to a county or a specific span.

  • Browse counties in Colorado and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Colorado Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.