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

E 5th Avenue

Fair

Over: Oligarchy Ditch

0.1 Mi East of Fox St, Boulder, CO

Built 1970 Load: 32.7 t ADT: 1,321

E 9th Avenue

Fair

Over: Oligarchy Ditch

100 ft E of Alpine Street, Boulder, CO

Built 2004 Load: 32.7 t ADT: 12,630

Fordham Street

Fair

Over: Dry Creek

0.3 Mi So of Nelson Road, Boulder, CO

Built 1997 Load: 32.7 t ADT: 1,944

Hover Road

Fair

Over: Oligarchy Ditch

100 Ft S of 20th Street, Boulder, CO

Built 1990 Load: 32.7 t ADT: 25,769

Hover Road

Fair

Over: Dry Creek No. 1

0.2 Mi S of Nelson Road, Boulder, CO

Built 1985 Load: 32.7 t ADT: 29,369

Pike Road

Fair

Over: Left Hand Creek

0.2 Mi E of Sunset St, Boulder, CO

Built 1994 Load: 32.7 t ADT: 13,459

Pratt Parkway

Fair

Over: BNRR and 1st Avenue

0.2 Mi N of Boston Ave, Boulder, CO

Built 1980 Load: 32.7 t ADT: 11,924

Price/Frontage Rds

Fair

Over: Dry Creek

S. Sunset St and Hwy 11, Boulder, CO

Built 1984 Load: 32.7 t ADT: 7,332

Spencer Street

Fair

Over: Oligarchy Ditch

50 Ft So of 20th St, Boulder, CO

Built 1975 Load: 32.7 t ADT: 995

Sunset Way

Fair

Over: Dry Creek

20 Ft SW of Korte Way, Boulder, CO

Built 1996 Load: 32.7 t ADT: 540

Railroad Avenue

Fair

Over: Greeley Loveland Canal

0.1 Mi N of East First St, Larimer, CO

Built 1917 Load: 32.7 t ADT: 1,010

West 1st Street

Fair

Over: Transfer Ditch

20 Ft E of Lu Ann Drive, Larimer, CO

Built 1930 Load: 32.7 t ADT: 6,800

West 29th Street

Fair

Over: L. Loveland Outlet Canal

425 W 29th Street, Larimer, CO

Built 1925 Load: 32.7 t ADT: 13,399

East 4th Street

Fair

Over: Greeley Loveland Canal

0.1 MI W of St. Louis AV, Larimer, CO

Built 1921 Load: 32.7 t ADT: 2,108

County Road 11H

Fair

Over: Big Thompson River

0.3 Mi N of St Hwy 402, Larimer, CO

Built 1966 Load: 32.7 t ADT: 8,892

County Road 13E

Fair

Over: Love/Horse Shoe Canal

0.3 Mi N of Co Rd 24E, Larimer, CO

Built 1937 Load: 32.7 t ADT: 6,823

County Road 15

Fair

Over: North Poudre Canal

0.9 Mi N of Co Rd 68, Larimer, CO

Built 1930 Load: 32.7 t ADT: 1,103

County Road 17

Fair

Over: Jackson Ditch

0.2 Mi No of Co Rd 54, Larimer, CO

Built 1986 Load: 32.7 t ADT: 2,822

County Road 25G

Fair

Over: Hansen Feeder Canal

0.2 Mi W of Co Rd 23, Larimer, CO

Built 1960 Load: 32.7 t ADT: 1,428

County Road 29C

Fair

Over: Poudre Valley Canal

150 Ft N of St Hwy 14, Larimer, CO

Built 1960 Load: 32.7 t ADT: 166

County Road 31D

Fair

Over: Big Thompson River

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

Built 1978 Load: 32.7 t ADT: 248

County Road 44

Fair

Over: Larimer & Weld Canal

Jct. with Co Rd 1, Larimer, CO

Built 1950 Load: 32.7 t ADT: 3,037

CO50E Bingham Hill

Fair

Over: Larimer Co. Canal No. 2

.2 Mi W of CR 21C, Larimer, CO

Built 1962 Load: 32.7 t ADT: 1,099

County Road 6C

Fair

Over: Little Thompson River

0.8 Mi N of Co Rd 15, Larimer, CO

Built 1960 Load: 32.7 t ADT: 130

County Road 70

Fair

Over: North Poudre Canal

0.1 Mi E of Co Rd 15, Larimer, CO

Built 1940 Load: 32.7 t ADT: 6,105

Country View Court

Fair

Over: New Ish Ditch

E of S CR 21, Larimer, CO

Built 2016 Load: 32.7 t ADT: 55

Rock Canyon Road

Fair

Over: Big Thompson River

10 Ft W of US Hwy 34, Larimer, CO

Built 1977 Load: 32.7 t ADT: 17

Willow Vista Court

Fair

Over: Home Supply Creek

0.2 Mi E of W 1st St, Larimer, CO

Built 2016 Load: 32.7 t ADT: 67

HOT SPRINGS BLVD.

Fair

Over: SAN JUAN RIVER

IN PAGOSA SPRINGS, Archuleta, CO

Built 1989 Load: 32.7 t ADT: 5,150

LEHOW AVE

Fair

Over: BIG DRY CREEK

.4 MI W OF BROADWAY, Arapahoe, CO

Built 1979 Load: 32.7 t ADT: 3,612

PRINCE STREET

Fair

Over: SLAUGHTERHOUSE GULCH

JUST S OF CRESTLINE AVE, Arapahoe, CO

Built 1998 Load: 32.7 t ADT: 6,372

FREMONT AVE

Fair

Over: HIGHLINE CANAL

0.25 MI W OF BROADWAY, Arapahoe, CO

Built 1965 Load: 32.7 t ADT: 1,651

McConnell Drive

Fair

Over: Saint Vrain Creek

50 Ft S of US36 / SH66, Boulder, CO

Built 2006 Load: 32.7 t ADT: 2,031

COUNTY ROAD 20

Fair

Over: LITTLE SALT WASH

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

Built 1965 Load: 32.7 t ADT: 457

COUNTY ROAD 21

Fair

Over: ADOBE CREEK

.7 MI N OF RD K, Mesa, CO

Built 1950 Load: 32.7 t ADT: 567

COUNTY ROAD 25

Fair

Over: GRAND VALLEY CANAL

.3 MI N OF RD H, Mesa, CO

Built 1983 Load: 32.7 t ADT: 1,319

COUNTY ROAD 25.5

Fair

Over: REDLANDS POWER CANAL

JUST S OF RD C.50, Mesa, CO

Built 1970 Load: 32.7 t ADT: 1,389

COUNTY ROAD 34

Fair

Over: GRAND VALLEY CANAL

.4 MI S OF F RD, Mesa, CO

Built 1970 Load: 32.7 t ADT: 1,247

COUNTY ROAD 36.75

Fair

Over: ORCHARD MESA CANAL #2

2.5 SE OF PALISADE, Mesa, CO

Built 2008 Load: 32.7 t ADT: 132

CR 37.3/ELBERTA AV

Fair

Over: GOVT. HIGHLINE CANAL

JUST S OF RD H, Mesa, CO

Built 1963 Load: 32.7 t ADT: 6,481

COUNTY ROAD 56.5

Fair

Over: PLATEAU CREEK

JUST N OF RD 330, Mesa, CO

Built 1984 Load: 32.7 t ADT: 15

COUNTY ROAD 65.7

Fair

Over: BUZZARD CREEK

.1 MI N OF RD 330E, Mesa, CO

Built 1985 Load: 32.7 t ADT: 21

COUNTY ROAD H

Fair

Over: GRAND VALLEY CANAL

.1 MI E OF RD 24, Mesa, CO

Built 1962 Load: 32.7 t ADT: 2,336

County Road 33

Fair

Over: South Platte River

1.0 Mi N of Co Rd X, Morgan, CO

Built 1987 Load: 32.7 t ADT: 144

CO RD S-14

Fair

Over: EAGLE RIVER

0.01 MI N OF US 24, Eagle, CO

Built 1975 Load: 32.7 t ADT: 485

MTN VILLAGE BLV

Fair

Over: PEDESTRIAN / SKIER

CITY STREET - MTN VILLAGE, San Miguel, CO

Built 1985 Load: 32.7 t ADT: 4,499

I 25 ML NBND

Fair

Over: HUERFANO RIVER

9.4 MI N OF JCT US 160+SH, Huerfano, CO

Built 1982 Load: 32.7 t ADT: 7,000

SH 10 ML

Fair

Over: CUCHARAS RIVER

7 MI E OF WALSENBURG, Huerfano, CO

Built 1984 Load: 32.7 t ADT: 390

112TH PLACE

Fair

Over: FARMERS HIGHLINE CA

JUST W OF NORTHGLENN DR, Adams, CO

Built 1960 Load: 32.7 t ADT: 555

MALLEY DRIVE

Fair

Over: FARMERS HIGHLINE CA

JUST E OF HIGHLINE DRIVE, Adams, CO

Built 1960 Load: 32.7 t ADT: 13,261

Showing 3,051-3,100 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.