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

VALENTIA ST

Good

Over: BRANTNER GULCH TRIB

0.20 MI N OF 128TH AVE, Adams, CO

Built 2006 Load: 32.7 t ADT: 329

WASHINGTON STREET

Good

Over: LOCAL DRAINAGE

0.3 MI N OF 144TH AVE, Adams, CO

Built 2018 Load: 32.7 t ADT: 8,317

VAIL VALLEY DR

Good

Over: GORE CREEK

0.1 MI S OF FRONTAGE ROAD, Eagle, CO

Built 1986 Load: 32.7 t ADT: 2,933

County Road 3.25

Good

Over: Sullivan Ditch

150 Ft N of St Hwy 52, Weld, CO

Built 2004 Load: 32.7 t ADT: 259

County Road 14

Good

Over: Speer Canal

2.2 Mi E of Co Rd 31, Weld, CO

Built 1978 Load: 32.7 t ADT: 608

County Road 33

Good

Over: Collins Lateral Ditch

0.1 Mi. N. of Co. Rd. 86, Weld, CO

Built 1996 Load: 32.7 t ADT: 550

County Road 153

Good

Over: Pawnee Creek

1.3 Mi S of Co Rd 100, Weld, CO

Built 1997 Load: 32.7 t ADT: 34

Mount Owens Street

Good

Over: Local Drainage

10 Ft W of Frontage Road, Larimer, CO

Built 2005 Load: 32.7 t ADT: 524

Ronald Reagan Ave.

Good

Over: Local Drainage

10 Ft W Frontage Road, Larimer, CO

Built 2005 Load: 32.7 t ADT: 1,564

15TH ST

Good

Over: New Cache LaPoudre Canal

0.3 MI N OF SH392, Weld, CO

Built 2011 Load: 32.7 t ADT: 9,231

17TH ST

Good

Over: GREELEY NO. 2 CANAL

0.3 MI N OF ST HWY 392, Weld, CO

Built 2004 Load: 32.7 t ADT: 1,985

Eastman Park Dr.

Good

Over: Whitney Ditch

0.2 Mi East of 7th Street, Weld, CO

Built 1981 Load: 32.7 t ADT: 10,186

WESTMOOR CIRCLE

Good

Over: BIG DRY CREEK

135 FT S OF WESTMOOR DR, Jefferson, CO

Built 1998 Load: 32.7 t ADT: 4,453

EATON STREET

Good

Over: BIG BULL CREEK

S OF 110TH AVENUE, Jefferson, CO

Built 1975 Load: 32.7 t ADT: 2,331

TENNYSON ST

Good

Over: LITTLE DRY CREEK

N OF 72ND ON TENNYSON ST, Adams, CO

Built 1988 Load: 32.7 t ADT: 1,652

WINONA CT

Good

Over: LITTLE DRY CREEK

N OF 72ND AVE ON WINONA C, Adams, CO

Built 1988 Load: 32.7 t ADT: 2,512

SHERIDAN BLVD

Good

Over: MID. BR. HYLAND CREEK

JUST N OF 104TH AVE, Jefferson, CO

Built 1987 Load: 32.7 t ADT: 32,178

BRADBURN BOULEVARD

Good

Over: LOCAL DRAINAGE

0.1 MI W OF PERRY ST, Adams, CO

Built 2003 Load: 32.7 t ADT: 2,603

WOLFF ST

Good

Over: COZY CORNER TRIBUTARY #5

0.25 MI E OF SHERIDAN BLV, Adams, CO

Built 2006 Load: 32.7 t ADT: 1,803

HURON ST

Good

Over: QUAIL CREEK

JUST N OF 134TH AVE, Adams, CO

Built 2006 Load: 32.7 t ADT: 11,623

HURON ST

Good

Over: SHAY DITCH

0.25 MI S OF 152ND AVE, Adams, CO

Built 2006 Load: 32.7 t ADT: 8,232

144TH AVE

Good

Over: WEST FRONTAGE RD

0.10 MI W OF I-25, Adams, CO

Built 2006 Load: 32.7 t ADT: 26,804

ORCHARD PARKWAY

Good

Over: LOCAL DRAINAGE

0.2 MI EAST OF HURON ST., Adams, CO

Built 2015 Load: 32.7 t ADT: 4,895

County Road RR

Good

Over: Trib. of Arikaree River

0.50 Mi N of Co Rd 24, Yuma, CO

Built 1990 Load: 32.7 t ADT: 37

COUNTY ROAD 5875

Good

Over: MONTROSE AND DELTA CANAL

.3 MI S OF MAPLEGROVE, Montrose, CO

Built 1940 Load: 32.8 t ADT: 466

COUNTY ROAD P.6

Good

Over: UNNAMED DRAINAGE

0.4 MI E OF SAN LUIS, Costilla, CO

Built 2006 Load: 32.8 t ADT: 1,230

RUSSELLVILLE ROAD

Good

Over: EAST CHERRY CREEK

1.6 MI NE OF HIGHWAY 83, Douglas, CO

Built 1996 Load: 32.8 t ADT: 1,291

US 36 ML

Good

Over: FLAT IRON CIRCLE EAST

NEAR FLATIRONS CROSSING, Broomfield, CO

Built 1999 Load: 32.8 t ADT: 62,000

RAMP TO I 70 WBND

Good

Over: 40TH AVE ML R

PENA BLVD OVER 40TH AVE, Adams, CO

Built 1993 Load: 32.8 t ADT: 33,000

SH 470 ML WBND

Good

Over: KEN CARYL RD

10.2 MI S. OF I 70, Jefferson, CO

Built 1987 Load: 32.8 t ADT: 29,000

G Road

Good

Over: GRAND VALLEY CANAL

.1 MI E OF ROAD 26.00, Mesa, CO

Built 1991 Load: 32.8 t ADT: 5,776

Namaqua Avenue

Good

Over: Big Barnes Ditch

600 Ft S of US Hwy 34, Larimer, CO

Built 1992 Load: 32.8 t ADT: 4,626

County Road 19

Good

Over: Larimer County Canal

0.95 Mi North St Hwy 14, Weld, CO

Built 2009 Load: 32.8 t ADT: 325

County Road 124

Good

Over: Porter Creek

1.5 Mi E of Co Rd 69, Weld, CO

Built 1989 Load: 32.8 t ADT: 110

County Road 18

Good

Over: North Platte River

0.1 Mi W of Co Rd 9, Jackson, CO

Built 1991 Load: 32.9 t ADT: 163

County Road 28

Good

Over: Buffalo Creek

2 MI E of St Hwy 14, Jackson, CO

Built 1989 Load: 32.9 t ADT: 45

US 287 ML

Good

Over: DRY CREEK

7.2 MI N OF JCT SH 66, Larimer, CO

Built 2005 Load: 32.9 t ADT: 18,000

COUNTY ROAD DD

Good

Over: MONTE VISTA CANAL

.5 MI W OF CR 11, Conejos, CO

Built 1993 Load: 32.9 t ADT: 46

SH 53 ML

Good

Over: 64TH ST DRAIN CANAL

.2 MI S OF I76/BROADWAY, Adams, CO

Built 1993 Load: 32.9 t ADT: 14,000

CR 28-HILLCREST DR

Good

Over: EAGLE RIVER

JUST N OF SH 6, Eagle, CO

Built 1981 Load: 32.9 t ADT: 3,280

6th Avenue

Good

Over: Cache La Poudre River

200 Ft N of A Street, Weld, CO

Built 1987 Load: 32.9 t ADT: 1,604

COUNTY RD 41.7

Good

Over: SARCILLO CANYON CREEK

3.5 MI NW OF SAN JUAN, Las Animas, CO

Built 1990 Load: 32.9 t ADT: 161

COUNTY RD 85.0

Good

Over: PURGATOIRE RIVER

JUST N OF CR 38.4, Las Animas, CO

Built 1985 Load: 32.9 t ADT: 579

Kalmia Avenue

Good

Over: Dry Creek

350 Ft East of US 36, Boulder, CO

Built 2017 Load: 33.0 t ADT: 2,621

SH 60 ML

Good

Over: SOUTH PLATTE RIVER

3.7 MI E OF JCT SH 257, Weld, CO

Built 2018 Load: 33.0 t ADT: 7,100

CASTLE OAK DRIVE

Good

Over: CHERRY CREEK

0.4 MI W OF HIGHWAY 83, Douglas, CO

Built 2006 Load: 33.0 t ADT: 3,995

US 85 NB ON RAMP

Good

Over: TERRAIN

NBND ON RAMP A, Douglas, CO

Built 2014 Load: 33.0 t ADT: 4,317

COUNTY ROAD 49

Good

Over: SMOKY HILL RIVER

1.0 MI N OF CR T, Cheyenne, CO

Built 1986 Load: 33.0 t ADT: 38

US 36 ML

Good

Over: NORTH ST VRAIN CREEK

IN LYONS, Boulder, CO

Built 2007 Load: 33.0 t ADT: 9,000

FILLMORE ST.

Good

Over: I 70 ML

900 FT W of STEELE ST, Denver, CO

Built 2020 Load: 33.0 t ADT: 5,970

Showing 6,551-6,600 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.