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

96th Street

Good

Over: Coal Creek

0.15 Mi. S. of SH42, Boulder, CO

Built 2006 Load: 38.6 t ADT: 15,821

COUNTY ROAD G.7

Good

Over: GOVT HIGHLINE CANAL

.3 MI W OF RD 36.3, Mesa, CO

Built 2001 Load: 38.6 t ADT: 193

County Road 28

Good

Over: Lower Platte Beaver Cnl

0.1 Mi No of Co Rd U.5, Morgan, CO

Built 2004 Load: 38.6 t ADT: 46

COUNTY ROAD 243

Good

Over: MUDDY CREEK

1.0 M NE OF HUCKLEBERRY, Pueblo, CO

Built 1992 Load: 38.6 t ADT: 108

Old San Isabel Rd

Good

Over: Little Saint Charles Ck

0.2 MI W Robb Rd, Pueblo, CO

Built 2009 Load: 38.6 t ADT: 100

104TH AVE

Good

Over: S. BRANCH HYLAND CREEK

.5 MI W OF SHERIDAN BLVD, Jefferson, CO

Built 1991 Load: 38.6 t ADT: 25,211

IRR# COUNTY RD 516

Good

Over: DRY CREEK

5.3 MI S OF SH 160, La Plata, CO

Built 1993 Load: 38.7 t ADT: 455

NORTH STREET

Good

Over: LOS PINOS RIVER DIVERSIO

IN BAYFIELD, La Plata, CO

Built 1997 Load: 38.7 t ADT: 164

SH 71 ML

Good

Over: SOUTH PLATTE RIVER

6.2 MI N OF JCT I-76, Morgan, CO

Built 1995 Load: 38.7 t ADT: 1,300

I 70 ML WBND

Good

Over: CLEAR CREEK

ARVADA, Jefferson, CO

Built 1995 Load: 38.7 t ADT: 46,000

RAMP TO US 285 NBD

Good

Over: PARMALEE GULCH R

INDIAN HILLS RD INTSCTN, Jefferson, CO

Built 1993 Load: 38.7 t ADT: 13,500

GORE CREEK DRIVE

Good

Over: GORE CREEK

0.1 MI S OF FRONTAGE ROAD, Eagle, CO

Built 1990 Load: 38.7 t ADT: 574

County Road 30

Good

Over: Buck Creek

50 Ft. E. of Co. Rd. R, Washington, CO

Built 1998 Load: 38.7 t ADT: 14

County Road 42

Good

Over: Elk River

0.9 Mi W of Co Rd 44, Routt, CO

Built 1989 Load: 38.8 t ADT: 222

COUNTY ROAD 42

Good

Over: RATTLESNAKE CREEK

.35 MI E OF CR 181, Arapahoe, CO

Built 1990 Load: 38.8 t ADT: 408

COUNTY ROAD AA

Good

Over: EMPIRE CANAL

1.2 MI W OF SH 285, Conejos, CO

Built 1999 Load: 38.8 t ADT: 64

CRYSTAL VALLEY PKW

Good

Over: SELLARS GULCH

0.1 MI W OF LAKE GULCH RD, Douglas, CO

Built 1999 Load: 38.8 t ADT: 5,296

I 225 ML

Good

Over: US 40 ML

IN AURORA, Adams, CO

Built 1988 Load: 38.8 t ADT: 140,000

I 70 ML EBND

Good

Over: COUNTY ROAD 145

3 MI E OF JCT SH 79, Arapahoe, CO

Built 1997 Load: 38.8 t ADT: 8,500

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

MILLER STREET

Good

Over: VAN BIBBER CREEK

JUST NORTH OF 58TH AVE, Jefferson, CO

Built 1979 Load: 38.9 t ADT: 782

WB MONTVIEW BLVD

Good

Over: WESTERLY CREEK

0.26 MI E OF YOSEMITE, Adams, CO

Built 2014 Load: 38.9 t ADT: 10,906

Flagstaff Rd CR56

Good

Over: HIllside Slide

1.0 Mi W of Baseline Rd, Boulder, CO

Built 2014 Load: 38.9 t ADT: 2,463

I 25 ML SBND

Good

Over: BIG THOMPSON RIVER

0.7 MI SO OF JCT US 34, Larimer, CO

Built 2022 Load: 38.9 t ADT: 34,000

I 25 ML NBND

Good

Over: BIG THOMPSON RIVER

1.3 MI N OF JCT SH 402, Larimer, CO

Built 2021 Load: 38.9 t ADT: 34,000

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

I 25 SERVICE RD

Good

Over: BIG THOMPSON RIVER SR

1.3 MI N OF JCT SH 402, Larimer, CO

Built 2020 Load: 38.9 t ADT: 3,911

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

SH 39 ML

Good

Over: SOUTH PLATTE RIVER

6.6 MI N OF JCT US 34, Morgan, CO

Built 1996 Load: 38.9 t ADT: 640

I 76 ML EBND+NBND

Good

Over: COUNTY ROAD

1 MI W OF FT MORGAN, Morgan, CO

Built 2005 Load: 38.9 t ADT: 8,000

I 76 ML EBND

Good

Over: COUNTY ROAD 24

4 MI S.W. OF BRUSH, Morgan, CO

Built 2014 Load: 38.9 t ADT: 8,000

I 76 ML WBND

Good

Over: COUNTY ROAD 24

5 MI E OF FT MORGAN, Morgan, CO

Built 2013 Load: 38.9 t ADT: 8,000

I 76 ML EBND

Good

Over: HOSPITAL ROAD

JUST W. OF BRUSH EXIT, Morgan, CO

Built 2013 Load: 38.9 t ADT: 8,000

I 76 ML WBND

Good

Over: HOSPITAL RD/CR 27

1 MI SW OF JCT SH 71, Morgan, CO

Built 2013 Load: 38.9 t ADT: 8,000

I 76 ML EBND

Good

Over: COUNTY ROAD 29

1 MI NE OF JCT SH 71 BRU, Morgan, CO

Built 2013 Load: 38.9 t ADT: 6,000

I 76 ML WBND

Good

Over: COUNTY ROAD 29

1 MI NE OF SH 71 BRUSH, Morgan, CO

Built 2013 Load: 38.9 t ADT: 6,000

PLUM CREEK PARKWAY

Good

Over: EAST PLUM CREEK

JUST E OF I-25, Douglas, CO

Built 2009 Load: 38.9 t ADT: 31,996

SH 119 ML E.Bnd

Good

Over: LEFT HAND CREEK

3.6 MI NE OF SH 52, Boulder, CO

Built 2003 Load: 38.9 t ADT: 24,000

I 70 ML WBND

Good

Over: SMITH ROAD UP RR

4.3 MI E OF JCT I 225, Adams, CO

Built 2014 Load: 38.9 t ADT: 17,000

I70 EBND ML

Good

Over: BRIGHTON BLVD

1.2 MI E of I25, Denver, CO

Built 2022 Load: 38.9 t ADT: 73,000

I 70 ML WBND

Good

Over: DAHLIA STREET

DENVER, Denver, CO

Built 2020 Load: 38.9 t ADT: 65,500

I70 ML WBND

Good

Over: HOLLY STREET

DENVER, Denver, CO

Built 2020 Load: 38.9 t ADT: 65,500

I 70 ML EBND

Good

Over: HOLLY STREET

DENVER, Denver, CO

Built 2020 Load: 38.9 t ADT: 65,500

I70 ML WBND

Good

Over: MONACO STREET

DENVER, Denver, CO

Built 2020 Load: 38.9 t ADT: 73,500

I70 ML EBND

Good

Over: MONACO STREET

DENVER, Denver, CO

Built 2020 Load: 38.9 t ADT: 73,500

I 70 ML EBND

Good

Over: RAMP RR COLORADO RVR

W END HANGING LAKE TUNNEL, Garfield, CO

Built 1992 Load: 38.9 t ADT: 8,500

US 6 ML

Good

Over: BRYANT STREET

IN DENVER, Denver, CO

Built 2014 Load: 38.9 t ADT: 134,000

US 40 ML

Good

Over: TOLLGATE CREEK

IN AURORA, Arapahoe, CO

Built 2015 Load: 38.9 t ADT: 38,000

I 25 ML NBND

Good

Over: BLACK SQUIRREL CREEK

3.7 MI N OF JCT SH 83 ML, El Paso, CO

Built 2014 Load: 38.9 t ADT: 46,000

I 25 ML SBND

Good

Over: BLACK SQUIRREL CREEK

6.8 MI S OF JCT SH 105 ML, El Paso, CO

Built 2014 Load: 38.9 t ADT: 46,000

Showing 7,251-7,300 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.