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

DEPEW STREET

Fair

Over: LOCAL DRAINAGE

.2 MI S OF COAL MINE RD, Jefferson, CO

Built 1970 Load: 32.7 t ADT: 1,261

SHERIDAN BLVD

Fair

Over: LOCAL DRAINAGE

.01 MI S OF ONTARIO AVE, Jefferson, CO

Built 1970 Load: 32.7 t ADT: 346

COON CREEK

Fair

Over: BOWLES AVE

BOWLES & JAY CT, Jefferson, CO

Built 1989 Load: 32.7 t ADT: 26,322

FAIR DRIVE

Fair

Over: COON CREEK

.25 MI SW BOWLES&SHER, Jefferson, CO

Built 1976 Load: 32.7 t ADT: 523

BALSAM WAY

Fair

Over: LOCAL DRAINAGE

1 BLOCK E OF WADSWORTH, Jefferson, CO

Built 1985 Load: 32.7 t ADT: 3,882

PIERCE STREET

Fair

Over: LILLEY GULCH

0.4 MI N OF COALMINE RD, Jefferson, CO

Built 1971 Load: 32.7 t ADT: 16,812

I 25 ML SBND

Fair

Over: DRAW

5.0 MI SE of JCT US85, El Paso, CO

Built 1958 Load: 32.7 t ADT: 20,500

I 25 ML SBND

Fair

Over: DRAW

5.0 MI SE OF JCT US 85, El Paso, CO

Built 1958 Load: 32.7 t ADT: 20,500

I 25 ML SBND

Fair

Over: DRAW

5.0 MI SE OF JCT US 85, El Paso, CO

Built 1958 Load: 32.7 t ADT: 20,500

I 25 ML SBND

Fair

Over: DRAW

5.0 MI SE OF JCT US 85, El Paso, CO

Built 1958 Load: 32.7 t ADT: 20,500

US 50 ML

Fair

Over: SPRING CREEK

7.7 MI SE OF SALIDA, Fremont, CO

Built 1934 Load: 32.7 t ADT: 5,600

SH 115 ML

Fair

Over: COAL CREEK

IN FLORENCE, Fremont, CO

Built 1921 Load: 32.7 t ADT: 6,600

COUNTY ROAD L

Fair

Over: MUSTANG CREEK

.8 MI W OF CR 7, Kiowa, CO

Built 2001 Load: 32.7 t ADT: 10

SH 78 ML

Fair

Over: BOGGS CREEK

6 MI. SW. OF SH 45, Pueblo, CO

Built 1925 Load: 32.7 t ADT: 1,500

I 25 SERVICE RD

Fair

Over: BRANTZELL ARROYO SR

7.1 MI NO OF JCT SH 165 M, Pueblo, CO

Built 1930 Load: 32.7 t ADT: 15,000

US 50 ML

Fair

Over: HUERFANO RIVER

JUST E. OF INTERSCT TO BO, Pueblo, CO

Built 1921 Load: 32.7 t ADT: 4,600

US 50 ML

Fair

Over: ROCKY FD. HIGHLINE CANAL

6 MI W. OF FOWLER, Pueblo, CO

Built 1932 Load: 32.7 t ADT: 4,200

US 50 ML

Fair

Over: WILEY DRAINAGE DITCH

1.4 MI E OF JCT SH 287, Prowers, CO

Built 1981 Load: 32.7 t ADT: 7,800

COUNTY RD 105.5

Fair

Over: RITO AGUA DULCE

.5 MI NW OF CR 105.6/8.8, Las Animas, CO

Built 1935 Load: 32.7 t ADT: 12

COKEDALE CONNECTOR

Fair

Over: REILLY CANYON CREEK

0.1 MI W OF CR 57.7, Las Animas, CO

Built 1977 Load: 32.7 t ADT: 429

COUNTY RD 38.0

Fair

Over: DURAN ARROYO

400 FEET E OF CR 85, Las Animas, CO

Built 1926 Load: 32.7 t ADT: 36

COUNTY RD 40.2

Fair

Over: ROAD CANYON CREEK

1.2 MI S OF CR 44, Las Animas, CO

Built 1910 Load: 32.7 t ADT: 18

COUNTY RD 8.8

Fair

Over: TRINCHERA CREEK

AT TRINCHERA, Las Animas, CO

Built 1940 Load: 32.7 t ADT: 29

COUNTY RD 6.8

Fair

Over: CHANNEY ARROYO

4 MI W of CR 133, Las Animas, CO

Built 1930 Load: 32.7 t ADT: 16

COUNTY RD 6.8

Fair

Over: TREMENTINA CREEK

.8 MI W OF SH 308, Las Animas, CO

Built 1940 Load: 32.7 t ADT: 25

COUNTY RD 91.0

Fair

Over: FURNESS ARROYO

1.4 MI N OF CR 40, Las Animas, CO

Built 1920 Load: 32.7 t ADT: 1

120TH STREET

Fair

Over: Coal Creek

0.25 M S of S. Boulder Rd, Boulder, CO

Built 1977 Load: 32.7 t ADT: 8,097

COUNTY ROAD 28

Fair

Over: ARIKAREE RIVER

0.5 MILES S OF ROAD 3V, Lincoln, CO

Built 1991 Load: 32.7 t ADT: 39

COUNTY ROAD 109

Fair

Over: SOUTH RUSH CREEK

JUST NORTH OF ROAD W, Lincoln, CO

Built 1988 Load: 32.7 t ADT: 131

COUNTY ROAD 43

Fair

Over: N FORK ARIKAREE RIVER

0.7 MILE SOUTH OF ROAD 4D, Lincoln, CO

Built 1993 Load: 32.7 t ADT: 58

BEAR CREEK PARK RD

Fair

Over: BEAR CREEK TRIB

1.35 MI EAST OF ENTRANCE, Jefferson, CO

Built 1950 Load: 32.7 t ADT: 282

BEAR CREEK PARK RD

Fair

Over: BEAR CREEK TRIB

1.80 MI EAST OF ENTRANCE, Jefferson, CO

Built 1986 Load: 32.7 t ADT: 217

DARTMOUTH AVE

Fair

Over: BEAR CREEK TRIBUTARY

200 FT W OF KIPLING PKWY, Jefferson, CO

Built 1982 Load: 32.7 t ADT: 13,589

FOX HOLLOW LANE

Fair

Over: BEAR CREEK TRIB.

FOX HOLLOW GOLF COURSE, Jefferson, CO

Built 1955 Load: 32.7 t ADT: 491

MEMORIAL DRIVE

Fair

Over: WILLOW CREEK

IN LAMAR, Prowers, CO

Built 1995 Load: 32.7 t ADT: 3,310

CANAL ROAD

Fair

Over: GREEN BELT FLOODWAY

JUST W OF 13TH STREET, Prowers, CO

Built 1976 Load: 32.7 t ADT: 41

County Road 25

Fair

Over: N. Sterling Inlet Canal

1.1 Mi N of Co Rd 20.5, Logan, CO

Built 1969 Load: 32.7 t ADT: 390

County Road 39

Fair

Over: Sterling Seep Ditch No 1

20 Ft N of Co Rd 30.5, Logan, CO

Built 1992 Load: 32.7 t ADT: 1,820

County Road 52

Fair

Over: Lewis Creek

0.25 Mi E of Co Rd 57, Logan, CO

Built 1982 Load: 32.7 t ADT: 19

County Road 55

Fair

Over: N Sterling Outlet Canal

0.2 MI N of Co Rd 58, Logan, CO

Built 2014 Load: 32.7 t ADT: 23

County Road 60.5

Fair

Over: Harmony No. 1 Canal

0.4 Mi E of Co Rd 79, Logan, CO

Built 1965 Load: 32.7 t ADT: 28

County Road 65

Fair

Over: Skinner Draw

0.6 Mi N of Co Rd 54.2, Logan, CO

Built 1982 Load: 32.7 t ADT: 229

County Road 66

Fair

Over: N. Sterling Outlet Canal

1.6 Mi E of Co Rd 65, Logan, CO

Built 2005 Load: 32.7 t ADT: 34

PARKWAY DRIVE

Fair

Over: WILLOW CREEK

JUST W OF WILLOW STREET, Douglas, CO

Built 1985 Load: 32.7 t ADT: 2,454

15th Avenue

Fair

Over: Oligarchy Ditch

100 Ft W of Lamplighte Dr, Boulder, CO

Built 1989 Load: 32.7 t ADT: 450

21st Ave Eastbound

Fair

Over: Oligarchy Ditch

300 Ft. E of Daley Dr., Boulder, CO

Built 1975 Load: 32.7 t ADT: 4,495

3rd Avenue

Fair

Over: Oligarchy Ditch

At Pace Street, Boulder, CO

Built 1969 Load: 32.7 t ADT: 16,797

Alpine Street

Fair

Over: Oligarchy Ditch

100 ft N of E 9th Ave., Boulder, CO

Built 1975 Load: 32.7 t ADT: 3,757

Boston Ave

Fair

Over: Spring Gulch

0.1 mile E. of Martin St., Boulder, CO

Built 2017 Load: 32.7 t ADT: 978

Dry Creek Drive

Fair

Over: Dry Creek No. 1

0.1 Mi So of Bent Way, Boulder, CO

Built 1991 Load: 32.7 t ADT: 5,490

Showing 3,001-3,050 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.