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

I 70 ML EBND

Fair

Over: COUNTY ROAD 134

2.5 MI W OF GLENWOOD SPGS, Garfield, CO

Built 1969 Load: 32.4 t ADT: 16,500

I 70 ML

Fair

Over: CANYON CREEK

5 MI. W. OF GLENWOOD SPGS, Garfield, CO

Built 1971 Load: 32.4 t ADT: 33,000

I 70 SERVICE RD SR

Fair

Over: COLORADO RIVER SR

N. OF DOTSERO INT., Eagle, CO

Built 2013 Load: 32.4 t ADT: 17,000

I 70 ML EBND

Fair

Over: COTTONWOOD CREEK

4.4 MI E OF JCT US 6-GYPS, Eagle, CO

Built 1979 Load: 32.4 t ADT: 11,000

COUNTY ROAD 96

Fair

Over: SOUTH PLATTE RIVER

4.5 MI. SE OF FOXTON, Jefferson, CO

Built 1990 Load: 32.4 t ADT: 166

I 70 WB RAMP

Fair

Over: US 6 ML

0.8MI W OF INDIANA ST, Jefferson, CO

Built 1969 Load: 32.4 t ADT: 53,000

MAIN STREET

Fair

Over: TEN MILE CREEK

0.1 MI E OF I-70, Summit, CO

Built 1970 Load: 32.4 t ADT: 5,497

US 24 SERVICE RD

Fair

Over: FOUNTAIN CREEK SR

IN MANITOU SPRINGS, El Paso, CO

Built 1969 Load: 32.4 t ADT: 27,000

I25 ML SBND

Fair

Over: MARK DABLING/UPRR

IN COLORADO SPRINGS, El Paso, CO

Built 2008 Load: 32.4 t ADT: 57,000

I 25 ML NBND

Fair

Over: DEL AGUA CANYON

12.6 MI SO OF JCT SH 239, Las Animas, CO

Built 1969 Load: 32.4 t ADT: 6,000

I 25 ML SBND

Fair

Over: BERWIND CANYON

8.4 MI S OF AGUILAR ROAD, Las Animas, CO

Built 1976 Load: 32.4 t ADT: 6,000

2nd Avenue

Fair

Over: Coal Creek

0.2 Mi South of Williams, Boulder, CO

Built 1992 Load: 32.4 t ADT: 492

COUNTY ROAD 35

Fair

Over: KICKING BIRD CANAL

1 MI N OF CR VV, Bent, CO

Built 1984 Load: 32.5 t ADT: 45

COUNTY LANE 10

Fair

Over: COLORADO CANAL

.2 MI NORTH OF ROAD H, Crowley, CO

Built 1991 Load: 32.5 t ADT: 104

I 70 ML EBND

Fair

Over: UP RR

0.5 MI E of JCT 6 - RIFLE, Garfield, CO

Built 1975 Load: 32.5 t ADT: 8,500

SH 391 ML NBND

Fair

Over: ILIFF GULCH

KIPLING 1.5 MI N OF US285, Jefferson, CO

Built 1981 Load: 32.5 t ADT: 18,500

RMP TO I25/AUR.PKW

Fair

Over: RMP TO I25 NB

IN DENVER, Denver, CO

Built 1988 Load: 32.5 t ADT: 49,000

TOMAH ROAD

Fair

Over: I 25 ML

1.9 MI N OF JCT S.H. 18, Douglas, CO

Built 1965 Load: 32.5 t ADT: 1,386

County Road 118

Fair

Over: Crystal River

Mt Sopris Road, Garfield, CO

Built 1992 Load: 32.5 t ADT: 58

I 70 ML WBND

Fair

Over: ADOBE CREEK

2.5 MI E OF JCT SH 340, Mesa, CO

Built 1969 Load: 32.5 t ADT: 9,000

I 70 ML EBND

Fair

Over: ADOBE CREEK

2.5 MI W OF FRUITA INT., Mesa, CO

Built 1969 Load: 32.5 t ADT: 9,000

SH 141 ML

Fair

Over: DOLORES RIVER

AT SLICK ROCK, San Miguel, CO

Built 1962 Load: 32.5 t ADT: 200

County Road 4E

Fair

Over: Little Thompson River

0.5 Mi E of Co Rd 17, Larimer, CO

Built 1975 Load: 32.5 t ADT: 121

US 287 ML

Fair

Over: DRAW

4.6 MILES NORTH OF SPRING, Baca, CO

Built 2000 Load: 32.5 t ADT: 3,000

CR 906 (BUCKHORN)

Fair

Over: UNCOMPAHGRE RIVER

0.1 MI E OF US 550, Ouray, CO

Built 1982 Load: 32.5 t ADT: 402

County Road 48

Fair

Over: Gilmore Ditch

0.5 Mi E of Co Rd 47, Weld, CO

Built 1998 Load: 32.5 t ADT: 97

IRR BIA RTE 206

Fair

Over: MANCOS RIVER

28.2 KM E OF CHIMNEY ROCK, Montezuma, CO

Built 1976 Load: 32.6 t ADT: 100

County Road 3

Fair

Over: Colorado River

Rd Williams Fk Reservoir, Grand, CO

Built 1992 Load: 32.6 t ADT: 1,230

County Road 32

Fair

Over: Illinois River

0.9 Mi E of St Hwy 125, Jackson, CO

Built 1995 Load: 32.6 t ADT: 64

104TH AVE/CHURCH R

Fair

Over: US 36 ML

2.4 MI SE BOULDER-JEFF CL, Broomfield, CO

Built 1991 Load: 32.6 t ADT: 27,233

SH 95 ML

Fair

Over: CLEAR CREEK

Sheridan 1.0 MI N of I 70, Jefferson, CO

Built 1953 Load: 32.6 t ADT: 37,000

I 25 ML

Fair

Over: PEDESTRIAN UNDERPASS

THORNTON, Adams, CO

Built 1955 Load: 32.6 t ADT: 154,000

I 70 ML EBND

Fair

Over: COLORADO RIVER

7.3 MI E / GLNWD SPRINGS, Garfield, CO

Built 1992 Load: 32.6 t ADT: 8,500

I 70 ACCESS RD

Fair

Over: KYLE RR AR

GENOA EXIT, Lincoln, CO

Built 1975 Load: 32.6 t ADT: 519

West 1st Street

Fair

Over: Greeley Loveland Canal

50 Ft W of Franklin Ave., Larimer, CO

Built 1988 Load: 32.6 t ADT: 4,384

I 25 ML SBND

Fair

Over: GREENHORN CREEK

1 MI SO OF JCT SH 165 ML, Pueblo, CO

Built 1965 Load: 32.6 t ADT: 7,000

County Road 45

Fair

Over: Hudson Annex Canal

1.0 Mi N of Co Rd 6, Weld, CO

Built 1969 Load: 32.6 t ADT: 2,756

County Road 56

Fair

Over: Crow Creek

1.4 Mi E of Co Rd 57, Weld, CO

Built 1995 Load: 32.6 t ADT: 512

C STREET

Fair

Over: HAVANA INTERCEPTOR

C STREET, Adams, CO

Built 1973 Load: 32.7 t ADT: 10

FDR 209

Fair

Over: CACHE LA POUDRE RIVER

.04 MI SOUTH OF CO HWY 14, Larimer, CO

Built 1960 Load: 32.7 t ADT: 55

FDR 514

Fair

Over: CALF CREEK

21.4 MI ON FDR 514, Dolores, CO

Built 1978 Load: 32.7 t ADT: 10

FDR 121

Fair

Over: CASTLE CR

1.9MI S OF ASHCROFT, Pitkin, CO

Built 1972 Load: 32.7 t ADT: 10

FDR 105-6C

Fair

Over: FRYINGPAN RV

DAY USE AREA @ DAM, Pitkin, CO

Built 1985 Load: 32.7 t ADT: 50

County Road 1

Fair

Over: Sheephorn Creek

Just south of MP 15, Grand, CO

Built 1997 Load: 32.7 t ADT: 632

County Road 11

Fair

Over: Colorado River

0.1 Mi So of Radium, Grand, CO

Built 1989 Load: 32.7 t ADT: 80

County Road 18

Fair

Over: Mallon Ditch

3.3 Mi W of Co Rd 12W, Jackson, CO

Built 1986 Load: 32.7 t ADT: 146

COUNTY ROAD 234

Fair

Over: FLORIDA RIVER

2 MI SW OF CR 225, La Plata, CO

Built 2006 Load: 32.7 t ADT: 2,438

County Rd 179

Fair

Over: Yampa River

0.8 Mi S of US Hwy 40, Routt, CO

Built 1984 Load: 32.7 t ADT: 614

WEST KEYSTONE RD.

Fair

Over: SNAKE RIVER

0.3 MI S OF HIGHWAY 9, Summit, CO

Built 1972 Load: 32.7 t ADT: 1,640

BOULDER CREEK RD

Fair

Over: BOULDER CREEK

0.1 MI W OF STATE HWY 9, Summit, CO

Built 1945 Load: 32.7 t ADT: 43

Showing 2,501-2,550 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.