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 WBND

Good

Over: UP RR COLORADO RIVER

WEST EXIT HANGING LAKE TU, Garfield, CO

Built 1992 Load: 32.7 t ADT: 8,500

PREV. US 6 ML

Good

Over: DRAW

0.9 MI E OF GYPSUM, Eagle, CO

Built 1933 Load: 32.7 t ADT: 9,390

SH 131 ML

Good

Over: ALKALI CREEK

2.5 MI N OF WOLCOTT, Eagle, CO

Built 1963 Load: 32.7 t ADT: 1,600

I 70 ML WBND

Good

Over: HILLSIDE

9.7 MI E OF JCT SH24, Eagle, CO

Built 1977 Load: 32.7 t ADT: 10,000

SH 9 ML

Good

Over: PEDESTRIAN UNDERPASS

200 FT S of Peak One Blvd, Summit, CO

Built 2023 Load: 32.7 t ADT: 22,287

US 285 ML

Good

Over: WILDLIFE CROSSING

NEAR CONIFER, Jefferson, CO

Built 2009 Load: 32.7 t ADT: 19,000

US 6 ML

Good

Over: I 25 ML

IN DENVER, Denver, CO

Built 2014 Load: 32.7 t ADT: 136,000

SH 470 ML WBND

Good

Over: BROADWAY

1.5 MI W OF JCT SH 177, Douglas, CO

Built 1985 Load: 32.7 t ADT: 41,000

I 70 ML

Good

Over: DRAINAGE DITCH

NEAR STRASBURG, Arapahoe, CO

Built 1999 Load: 32.7 t ADT: 17,000

US 36 ML

Good

Over: DRAW

3.9 MI W OF LAST CHANCE, Washington, CO

Built 2005 Load: 32.7 t ADT: 560

50TH AVENUE

Good

Over: FARMERS HIGHLINE CANAL

.5 MI W OF MCINTYRE, Jefferson, CO

Built 1972 Load: 32.7 t ADT: 3,277

INDIANA ST

Good

Over: CROKE CANAL

.4 MI N OF 52ND AVE, Jefferson, CO

Built 2008 Load: 32.7 t ADT: 3,405

VIRGIL COURT

Good

Over: LOCAL DRAINAGE

0.2 MI S OF 60TH AVE, Jefferson, CO

Built 1994 Load: 32.7 t ADT: 207

Bryan Avenue

Good

Over: Larimer Co Canal No. 2

0.2 Mi N of Mulberry St, Larimer, CO

Built 2015 Load: 32.7 t ADT: 2,362

Chase Drive

Good

Over: Fossil Ck Resv Inlet

.25 Mi SW Drake Ziegler, Larimer, CO

Built 2008 Load: 32.7 t ADT: 78

Corbett Drive

Good

Over: McClellands Channel

100 Ft N of Saddle Crk Dr, Larimer, CO

Built 2001 Load: 32.7 t ADT: 1,058

Centre Ave

Good

Over: Spring Creek

.1Mi S of Bay Dr., Larimer, CO

Built 2010 Load: 32.7 t ADT: 7,889

East Vine Drive

Good

Over: Dry Creek

0.3 Mi. E. of Lemay, Larimer, CO

Built 2006 Load: 32.7 t ADT: 6,115

Glenmoor Drive

Good

Over: Local Drainage

0.1 MI N of Plum St, Larimer, CO

Built 2013 Load: 32.7 t ADT: 469

Kinnison Drive

Good

Over: Pleasant Valley Canal

Just E of Taft Hill Road, Larimer, CO

Built 2009 Load: 32.7 t ADT: 18

Lincoln Avenue

Good

Over: Cache La Poudre River

50 E of Willow Street, Larimer, CO

Built 2017 Load: 32.7 t ADT: 7,199

Mulberry Street

Good

Over: Mercer Ditch

Just E. of Crestmore, Larimer, CO

Built 2016 Load: 32.7 t ADT: 13,247

Old Mill Road

Good

Over: McClellands Channel

200 Ft. N of Saddle Ck Dr, Larimer, CO

Built 2002 Load: 32.7 t ADT: 506

Prospect Avenue

Good

Over: Box Elder Creek

0.5 Mi West of I25, Larimer, CO

Built 2016 Load: 32.7 t ADT: 20,967

Sherwood/Mulberry

Good

Over: Arthur Ditch

Sherwood at Mulberry, Larimer, CO

Built 2005 Load: 32.7 t ADT: 531

Rigden Pkwy

Good

Over: Fossil Ck Resv Inlet

.5 MI SW of Drake/Ziegler, Larimer, CO

Built 2008 Load: 32.7 t ADT: 998

William Neal Pkwy

Good

Over: Fossil Ck Resv Inlet

E of Ziegler and W CR9, Larimer, CO

Built 2008 Load: 32.7 t

Ziegler Road

Good

Over: Fossil Ck Resv Inlet

.1 MI N William N. Pkwy, Larimer, CO

Built 2008 Load: 32.7 t ADT: 15,977

COUNTY ROAD 95

Good

Over: SECOND ALKALI CREEK

1.5 MI W OF SH 67, Fremont, CO

Built 2007 Load: 32.7 t ADT: 285

County Road 11

Good

Over: Sullivan Ditch

0.7 Mi N of Co Rd 16, Weld, CO

Built 2004 Load: 32.7 t ADT: 912

TIPPLE PKWY/CO16

Good

Over: LOWER BOULDER DITCH

0.9 MI E OF CO RD 7, Weld, CO

Built 2012 Load: 32.7 t ADT: 49

I 70 ML

Good

Over: DRAW

0.2 MI. W. OF MESA/GARFIE, Mesa, CO

Built 1951 Load: 32.7 t ADT: 18,000

I 70 EBND

Good

Over: COTTONWOOD CREEK

3.8 MI E OF PARACHUTE, Garfield, CO

Built 1981 Load: 32.7 t ADT: 10,000

SH 9 ML

Good

Over: PLATTE GULCH

6.8 MI N. OF JCT U.S. 285, Park, CO

Built 2023 Load: 32.7 t ADT: 4,000

SOUTH VALLEY ROAD

Good

Over: DEER CREEK TRIBUTARY

1.5 MI S OF KEY CARYL AVE, Jefferson, CO

Built 1975 Load: 32.7 t ADT: 1,801

YOUNGFIELD ST

Good

Over: WEAVER CREEK

0.5 MI S OF QUINCY, Jefferson, CO

Built 1980 Load: 32.7 t ADT: 1,665

US 24 ML

Good

Over: DRAW

4 MI E OF SEIBERT/SH59, Kit Carson, CO

Built 1932 Load: 32.7 t ADT: 370

US 385 ML

Good

Over: DRAW

11.5 MI. SO OF JCT. S-H., Kit Carson, CO

Built 1956 Load: 32.7 t ADT: 740

County Road 137

Good

Over: Canyon Creek

0.1Mi E of Bear Wallow Rd, Garfield, CO

Built 2017 Load: 32.7 t ADT: 161

County Road 204

Good

Over: Conn Creek

3.35 Mi N of Mesa Co Line, Garfield, CO

Built 2009 Load: 32.7 t ADT: 690

WASHINGTON AVENUE

Good

Over: CLEAR CREEK

JUST S OF 10TH STREET, Jefferson, CO

Built 2003 Load: 32.7 t ADT: 6,904

ILLINOIS STREET

Good

Over: KINNEY RUN

0.4 MI S OF 24TH STREET, Jefferson, CO

Built 2004 Load: 32.7 t ADT: 137

83rd Ave. (CR 27)

Good

Over: Sheep Draw

1.0 M N of US Hwy 34 Bypa, Weld, CO

Built 2004 Load: 32.7 t ADT: 6,152

Two Rivers Parkway

Good

Over: Loveland Greeley Canal

.2 Mi N 37th St/77th Ave, Weld, CO

Built 2000 Load: 32.7 t ADT: 1,032

35th Avenue

Good

Over: Greeley No. 3 Ditch

0.3 Mi North of 4th St, Weld, CO

Built 1976 Load: 32.7 t ADT: 10,593

COUNTY ROAD 22

Good

Over: PERSIGO WASH

JUST N OF US 60, Mesa, CO

Built 2012 Load: 32.7 t ADT: 7,644

Riverside Parkway

Good

Over: INDIAN WASH

JUST W OF RD 28, Mesa, CO

Built 2008 Load: 32.7 t ADT: 12,359

CO RD 48

Good

Over: OHIO CREEK

3.0 MI N OF GUNNISON, Gunnison, CO

Built 1995 Load: 32.7 t ADT: 798

CO RD 76

Good

Over: QUARTZ CREEK

3.4 MI NE OF PARLIN, Gunnison, CO

Built 1990 Load: 32.7 t ADT: 499

COUNTY ROAD 738

Good

Over: EAST RIVER

3.9 MI E OF CRESTED BUTTE, Gunnison, CO

Built 1988 Load: 32.7 t ADT: 183

Showing 6,401-6,450 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.