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

COUNTY ROAD 3R

Fair

Over: HELL CREEK

0.5 MILE WEST OF CR 42, Lincoln, CO

Built 1992 Load: 99.9 t ADT: 26

COUNTY ROAD X

Fair

Over: STEELS FORK CREEK

JUST WEST OF ROAD 4, Lincoln, CO

Built 1988 Load: 99.9 t ADT: 179

COLLINS AVENUE

Fair

Over: LAKEWOOD GULCH

0.1 MI E OF SIMMS ST, Jefferson, CO

Built 1997 Load: 99.9 t ADT: 2,008

County Road 11.1

Fair

Over: Pawnee Creek

1.9 MI N of St Hwy 14, Logan, CO

Built 1998 Load: 99.9 t ADT: 17

County Road 7.4

Fair

Over: Spring Creek

0.1 Mi S of Co Rd 38, Logan, CO

Built 1975 Load: 99.9 t ADT: 21

Taft Avenue

Fair

Over: Greeley Loveland Canal

0.4 Mi N of First St, Larimer, CO

Built 1980 Load: 99.9 t ADT: 21,527

County Road 15

Fair

Over: Poudre Valley Canal

1.0 Mi N of Co Rd 60, Larimer, CO

Built 1987 Load: 99.9 t ADT: 1,784

County Road 29

Fair

Over: Green Ridge Glade Reser.

0.3 Mi N of Co Rd 22H, Larimer, CO

Built 2004 Load: 99.9 t ADT: 145

County Road 30

Fair

Over: Louden Ditch

0.2 Mi E of US Hwy 287, Larimer, CO

Built 1979 Load: 99.9 t ADT: 1,036

County Road 70

Fair

Over: Coal Creek

0.9 Mi E of Co Rd 9, Larimer, CO

Built 1995 Load: 99.9 t ADT: 6,026

MINERAL AVE

Fair

Over: LEE GULCH

0.3 MI S OF DRY CREEK, Arapahoe, CO

Built 2021 Load: 99.9 t ADT: 19,170

SH 145 ML

Fair

Over: SAN MIGUEL RIVER

@ JCT WITH TELLURIDE SPUR, San Miguel, CO

Built 1960 Load: 99.9 t ADT: 7,600

I 25 NE RAMP

Fair

Over: DRAW R

16.9 MI NO OF WALSENBURG, Huerfano, CO

Built 1965 Load: 99.9 t ADT: 14,000

County Road 10

Fair

Over: Wildcat Creek

0.4 Mi S of Co Rd JJ, Morgan, CO

Built 1996 Load: 99.9 t ADT: 72

County Road K

Fair

Over: Antelope Creek

1.0 Mi E of Co Rd 6, Morgan, CO

Built 1994 Load: 99.9 t ADT: 18

County Road 7

Fair

Over: Cedar Mountain Gulch

0.53 Mi North US Hwy 40, Moffat, CO

Built 1950 Load: 99.9 t ADT: 773

US550 ML

Fair

Over: LITTLE CASCADE CREEK

8.4 MI S COAL BANK PASS, La Plata, CO

Built 1980 Load: 99.9 t ADT: 3,200

US 160 ML

Fair

Over: NORTH VETA CREEK

1.9 MILES EAST OF JCT SH, Huerfano, CO

Built 1927 Load: 99.9 t ADT: 5,300

SH 10 ML

Fair

Over: RATTLESNAKE CANYON

16 MI E OF WALSENBURG, Huerfano, CO

Built 1993 Load: 99.9 t ADT: 390

I25 ML / FRONTAGE

Fair

Over: MAYNE ARROYO

5.5 MI S OF SH10-WLSNBRG., Huerfano, CO

Built 1965 Load: 99.9 t ADT: 11,000

US 160 ML

Fair

Over: LIGHTNER CREEK

W. EDGE OF DURANGO, La Plata, CO

Built 1970 Load: 99.9 t ADT: 12,000

US 160 ML

Fair

Over: LIGHTNER CREEK

W. EDGE OF DURANGO, La Plata, CO

Built 1971 Load: 99.9 t ADT: 12,000

COUNTY ROAD 361

Fair

Over: WEEHAWKEN CREEK

2.7 MI SW OF OURAY, Ouray, CO

Built 2004 Load: 99.9 t ADT: 407

IRR# SH 151 ML

Fair

Over: STOLLSTEIMER CREEK

13 MILES NE OF ARBOLES, Archuleta, CO

Built 1968 Load: 99.9 t ADT: 740

CR227/Bergemann RD

Fair

Over: SALT CREEK

3.5 MI S of SH 78, Pueblo, CO

Built 1996 Load: 99.9 t ADT: 51

CR501/OVERTON RD

Fair

Over: UNNAMED DRAINAGE

8.6 MI N OF PUEBLO, Pueblo, CO

Built 2003 Load: 99.9 t ADT: 184

18TH STREET

Fair

Over: WILLIAMS + DRY CREEKS

At Graham Ave., Pueblo, CO

Built 1973 Load: 99.9 t ADT: 7,621

DILLON DRIVE

Fair

Over: UNNAMED DRAINAGE

200 ft S of SH47, Pueblo, CO

Built 2000 Load: 99.9 t ADT: 18,466

PARKER BLVD.

Fair

Over: WILLIAMS CREEK

.5 MI N OF SPAULDING, Pueblo, CO

Built 1999 Load: 99.9 t ADT: 66

Coalton Drive

Fair

Over: Rock Creek

0.15 Mi East of McCaslin, Boulder, CO

Built 2000 Load: 99.9 t ADT: 4,964

Indiana Avenue

Fair

Over: Rock Creek

150 Ft N of Coalton D, Boulder, CO

Built 1999 Load: 99.9 t ADT: 1,916

CITY ST - DAVIS

Fair

Over: SAN MIGUEL RIVER

150 FT N of SH145, San Miguel, CO

Built 1995 Load: 99.9 t ADT: 253

EHLER PARKWAY

Fair

Over: TODD CREEK TRIBUTARY

0.1 MI W OF YOSEMITE ST, Adams, CO

Built 2001 Load: 99.9 t ADT: 2,733

FILLMORE STREET

Fair

Over: LOCAL DRAINAGE

0.12 MI E OF YORK AVE, Adams, CO

Built 2006 Load: 99.9 t ADT: 1,566

TAMARAC STREET

Fair

Over: BRANTNER GULCH TRIB

0.1 MI SOUTH OF 130TH, Adams, CO

Built 2005 Load: 99.9 t ADT: 1,529

County Road D

Fair

Over: Trib. to Beaver Creek

0.65 Mi. N. of Co. Rd. 20, Washington, CO

Built 1993 Load: 99.9 t ADT: 7

NFSR 112.0

Good

Over: SOUTH ST VRAIN CREEK

W. SIDE OF BRAINARD LAKE, Boulder, CO

Built 2011 ADT: 200

County Road 26A

Good

Over: Sneffels Creek

0.1 MI S. of CR26, Ouray, CO

Built 2010 Load: 4.6 t ADT: 9

IRR# SH 151 ML

Good

Over: LOS PINOS RIVER

IN IGNACIO, La Plata, CO

Built 2005 Load: 5.8 t ADT: 3,400

I 25 RAMP

Good

Over: HOV RAMP R

I 25 NBND & SH 224, Adams, CO

Built 1998 Load: 6.5 t ADT: 242,000

I 25 ML

Good

Over: US 85 ML

IN DENVER, Denver, CO

Built 2013 Load: 6.5 t ADT: 172,000

CHEYENNE CANYON RD

Good

Over: NORTH CHEYENNE CREEK

1.6 MI W EVANS AVENUE, El Paso, CO

Built 2022 Load: 7.1 t ADT: 655

E Suniga Road

Good

Over: Lake Canal

500 Feet E of Redwood St, Larimer, CO

Built 2023 Load: 7.1 t ADT: 1,623

US 34 ML

Good

Over: BIG THOMPSON RIVER

6.5 MI E OF ESTES PARK, Larimer, CO

Built 2003 Load: 9.7 t ADT: 5,800

I 25 SBND RAMP

Good

Over: I 25 ML

JCT I25 + SH6 IN DENVER, Denver, CO

Built 1989 Load: 10.0 t ADT: 107,500

COUNTY ROAD 20

Good

Over: CATLIN CANAL

.3 MI N OF CR DD, Otero, CO

Built 1966 Load: 10.8 t ADT: 90

COUNTY ROAD 56

Good

Over: BEAVER CREEK

0.8 MILES NW OF RD KK, Kit Carson, CO

Built 1960 Load: 10.9 t ADT: 16

ALLEY

Good

Over: EAST HARVARD GULCH

BTWN DOWNING AND MARION, Denver, CO

Built 1967 Load: 11.0 t ADT: 34

ALLEY

Good

Over: EAST HARVARD GULCH

BTWN WILLIAMS AND HIGH, Denver, CO

Built 1967 Load: 11.2 t ADT: 41

SH 9 ML

Good

Over: BLUE RIVER

11.5 MI NO OF JCT I70, Summit, CO

Built 2002 Load: 11.4 t ADT: 2,800

Showing 5,301-5,350 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.