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

SH 21B NBND ML

Good

Over: PINE CREEK

NB POWERS BLVD N/ CO SPRN, El Paso, CO

Built 2014 Load: 29.2 t ADT: 18,500

I 25 ML

Good

Over: US 50 ML & SH 47 ML

IN PUEBLO, Pueblo, CO

Built 2002 Load: 29.2 t ADT: 57,000

Mountain Dr.

Good

Over: Clover Basin Ditch

200 ft S. of Four Leaf Dr, Boulder, CO

Built 2018 Load: 29.2 t ADT: 1,399

Crown Point Dr.

Good

Over: Cache La Poudre River

Just S of CR 14, Larimer, CO

Built 2018 Load: 29.2 t ADT: 37

COUNTY ROAD 6

Good

Over: RIVERSIDE CANAL

0.6 MI N OF CO RD BB, Morgan, CO

Built 2012 Load: 29.2 t ADT: 33

County Road V

Good

Over: Beaver Creek & Lpb C

0.5 Mi E of Co Rd 31, Morgan, CO

Built 2018 Load: 29.2 t ADT: 45

County Road 34

Good

Over: Peterson Ditch

0.3 Mi. E. of Co. Rd. 34, Sedgwick, CO

Built 1996 Load: 29.2 t ADT: 66

County Road 45

Good

Over: New Cache La Poudre Cana

.8 Mi N of St Hwy 392, Weld, CO

Built 2015 Load: 29.2 t ADT: 137

County Road 68

Good

Over: Crow Creek

0.7 Mi E of Co Rd 59, Weld, CO

Built 2018 Load: 29.2 t ADT: 1,909

County Road 78

Good

Over: Larimer and Weld Canal

0.3 Mi E of Co Rd 27, Weld, CO

Built 1992 Load: 29.2 t ADT: 572

I 76 ML EBND

Good

Over: SH 95 ML

1.67 MI E I-70 SH 121, Jefferson, CO

Built 1986 Load: 29.3 t ADT: 39,500

US 550 ML NBND

Good

Over: UNCOMPAHGRE RIVER

S EDGE OF MONTROSE, Montrose, CO

Built 1976 Load: 29.3 t ADT: 6,500

County Road 65

Good

Over: N. Sterling Outlet Canal

20 Ft S of Co Rd 64, Logan, CO

Built 1997 Load: 29.3 t ADT: 39

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.3 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.4 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.5 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

US 34 ML

Good

Over: BIG THOMPSON RIVER

2 MI E OF ESTES PARK, Larimer, CO

Built 2010 Load: 29.4 t ADT: 5,800

SH 392 ML

Good

Over: GREELEY CANAL NO 2

7.8 MI E OF SH 257, Weld, CO

Built 1969 Load: 29.4 t ADT: 6,500

COUNTY ROAD DD

Good

Over: N.FK SMOKEY HILL RVR

.7 MI E OF CR 31, Cheyenne, CO

Built 1992 Load: 29.4 t ADT: 8

I 70 ML WBND

Good

Over: COUNTY ROAD

DOWNIEVILLE INT., Clear Creek, CO

Built 1965 Load: 29.4 t ADT: 18,500

I 70 ML EBND

Good

Over: COUNTY ROAD

2.5 MI E OF JCT US 40, Clear Creek, CO

Built 1965 Load: 29.4 t ADT: 18,500

I 270 EBND

Good

Over: I76 RAMP SH224 CLEAR CRK

1 mile East of I-25, Adams, CO

Built 1999 Load: 29.4 t ADT: 37,500

COUNTY ROAD 351

Good

Over: CUCHARAS RIVER

.3 MI SOUTH OF US 160, Huerfano, CO

Built 1999 Load: 29.4 t ADT: 104

US 385 ML

Good

Over: N FK LADDER CREEK

1.4 MI S OF US 40, Cheyenne, CO

Built 1960 Load: 29.4 t ADT: 730

US 50 ML

Good

Over: BLUE CREEK

11.2 MI E OF CIMARRON, Gunnison, CO

Built 1936 Load: 29.4 t ADT: 2,800

COUNTY ROAD 38.8

Good

Over: ORCHARD MESA CANAL

.1 MI S OF US 6, Mesa, CO

Built 1989 Load: 29.4 t ADT: 236

SHERIDAN BLVD

Good

Over: BIG DRY CREEK

0.2 MI S OF 112TH AVENUE, Jefferson, CO

Built 1995 Load: 29.4 t ADT: 28,771

SH 14 ML

Good

Over: BOYD GULCH

6.7 MI W OF JCT US 287, Larimer, CO

Built 2018 Load: 29.5 t ADT: 3,000

County Road 1

Good

Over: ST VRAIN CREEK

.5 mi south of SH119, Boulder, CO

Built 2014 Load: 29.5 t ADT: 9,344

I76 ML EBND

Good

Over: COUNTY ROAD 22

4 MI EAST OF FT MORGAN, Morgan, CO

Built 2005 Load: 29.5 t ADT: 8,000

BUZZARD CREEK RD

Good

Over: BUZZARD CREEK

JUST S OF PE ROAD, Mesa, CO

Built 1987 Load: 29.5 t ADT: 470

MILL ROAD

Good

Over: US 6 ML

COMMERCE CITY N of 60th, Adams, CO

Built 1993 Load: 29.5 t ADT: 839

E-470 SB

Good

Over: Buckley Road

34.63 MI FROM I25, Adams, CO

Built 2002 Load: 29.5 t ADT: 22,565

I 25 ML NBND

Good

Over: EAST PLUM CREEK

WEST OF CASTLE ROCK BUS.D, Douglas, CO

Built 2010 Load: 29.5 t ADT: 41,000

CR324/Maxfield Rd

Good

Over: West Divide Creek

150 FT W of CO Rd 311, Garfield, CO

Built 2014 Load: 29.5 t ADT: 106

SH 330 ML

Good

Over: PLATEAU CREEK

3.3 MI E OF JCT SH 65, Mesa, CO

Built 1975 Load: 29.5 t ADT: 1,300

COUNTY RD 7

Good

Over: NORTH CREEK DRAINAGE

150FT S. OF CR 34.5, Weld, CO

Built 2020 Load: 29.5 t ADT: 3,231

County Road 10

Good

Over: Riverside Canal

1.3 Mi N of Co Rd Y, Morgan, CO

Built 2007 Load: 29.5 t ADT: 36

CHAMBERS RD NB

Good

Over: NEWLIN GULCH

1.1 MI N of HESS ROAD, Douglas, CO

Built 2017 Load: 29.5 t ADT: 8,373

County Road 100

Good

Over: Lone Tree Creek

1.0 Mi E of Co Rd 35, Weld, CO

Built 1991 Load: 29.5 t ADT: 83

South Shield Drive

Good

Over: Yampa River

0.3 Mi S of US Hwy 40, Routt, CO

Built 1993 Load: 29.6 t ADT: 2,672

120TH AVE EBND

Good

Over: RIVERDALE RD

2 MI W OF US85, Adams, CO

Built 2005 Load: 29.6 t ADT: 9,443

30th Street

Good

Over: Boulder Lefthand Ditch

400 Ft So of Pearl St, Boulder, CO

Built 2011 Load: 29.6 t ADT: 20,225

HAYSTACK ROAD

Good

Over: SELLARS GULCH

0.2 MI W OF LAKE GULCH RD, Douglas, CO

Built 2013 Load: 29.6 t ADT: 273

US 85 ML

Good

Over: CREWS GULCH

3.5 MI NW OF FOUNTAIN, El Paso, CO

Built 2001 Load: 29.6 t ADT: 18,000

County Road 8

Good

Over: Gov.Highline Canal

0.5 MI N of CR 5, Mesa, CO

Built 1986 Load: 29.6 t ADT: 200

County Road C

Good

Over: Buck Creek

0.9 Mi E of Co Rd 34, Morgan, CO

Built 1989 Load: 29.6 t ADT: 10

County Road 129

Good

Over: Little Snake River

0.13 Mi So of Wym. SH 70, Moffat, CO

Built 1989 Load: 29.6 t ADT: 153

KIPLING STREET

Good

Over: FARMERS HIGHLINE CANAL

JUST SOUTH OF 86TH PKWY, Jefferson, CO

Built 1984 Load: 29.7 t ADT: 8,443

SH 318 ML

Good

Over: VERMILLION CREEK

29 MI NW OF SUNBEAM, Moffat, CO

Built 1976 Load: 29.7 t ADT: 100

Showing 5,901-5,950 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.