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

County Road 29

Good

Over: Cache La Poudre River

0.5 Mi S of Co Rd 64, Weld, CO

Built 1990 Load: 32.6 t ADT: 419

County Road 55

Good

Over: Greeley Ditch

0.2 MI North of CR 66, Weld, CO

Built 1986 Load: 32.6 t ADT: 2,137

MILITARY RES BNDRY

Good

Over: Drainage channel

4 mi. S of junct w/ Rte 5, El Paso, CO

Built 1984 Load: 32.7 t ADT: 100

TOUR LOOP

Good

Over: First Creek

1.0 MI E OF C STREET, Adams, CO

Built 2010 Load: 32.7 t ADT: 75

FDR 514

Good

Over: PLATEAU CREEK

21.4 MI ON FDR 514, Dolores, CO

Built 1978 Load: 32.7 t ADT: 12

FDR 622

Good

Over: PIEDRA RIVER

18.5 MI WNW OF PAGOSA SPG, Archuleta, CO

Built 1957 Load: 32.7 t ADT: 42

FDR 667

Good

Over: EAST FORK SAN JUAN RIVER

3.4 MI ON FDR 667, Archuleta, CO

Built 1969 Load: 32.7 t ADT: 129

FDR 667

Good

Over: EAST FORK SAN JUAN RIVER

2.7 MI ON FDR 667, Archuleta, CO

Built 1969 Load: 32.7 t ADT: 175

FDR 637

Good

Over: EAST TONER

1.20 MI ON FDR 637, Hinsdale, CO

Built 1965 Load: 32.7 t ADT: 50

County Road 84

Good

Over: Ranch Creek

Road to Meadow Creek Res, Grand, CO

Built 1992 Load: 32.7 t ADT: 533

COUNTY ROAD 141

Good

Over: WILDCAT CANYON

JUST S OF SH160, La Plata, CO

Built 2006 Load: 32.7 t ADT: 3,182

COUNTY ROAD 207

Good

Over: LIGHTNER CREEK

.2 MI N OF SH 160, La Plata, CO

Built 2013 Load: 32.7 t ADT: 1,000

COUNTY ROAD 225A

Good

Over: LONG HOLLOW CREEK

.3 MI S OF SH 160, La Plata, CO

Built 2011 Load: 32.7 t ADT: 1,689

COUNTY ROAD 501

Good

Over: BEAR CREEK

5.3 MI N OF BAYFIELD/MP 5, La Plata, CO

Built 2009 Load: 32.7 t ADT: 3,533

COUNTY ROAD 527

Good

Over: BEAVER CREEK

2.1 MI NE OF BAYFIELD, La Plata, CO

Built 2010 Load: 32.7 t ADT: 300

COUNTY RD 509

Good

Over: KING DITCH

AT BAYFIELD, La Plata, CO

Built 1994 Load: 32.7 t ADT: 50

COUNTY ROAD 2700

Good

Over: TUTTLE DRAW

1.5 MI N OF CR CC, Montrose, CO

Built 2013 Load: 32.7 t ADT: 116

County Road 27

Good

Over: Trout Creek

4.0 Mi NW of St Hwy 131, Routt, CO

Built 2000 Load: 32.7 t ADT: 607

County Road 129

Good

Over: Hot Spring Creek

4.9 Mi N of US Hwy 40, Routt, CO

Built 1996 Load: 32.7 t ADT: 2,812

REVETT DRIVE

Good

Over: SWAN RIVER

0.1 MI N OF TIGER RD, Summit, CO

Built 1997 Load: 32.7 t ADT: 156

Lions Gate Drive

Good

Over: Vasquez Creek

LIONS GATE/RENDVOU WY, Grand, CO

Built 1996 Load: 32.7 t ADT: 703

COUNTY ROAD 65

Good

Over: SODA CREEK

1.3 MI SO OF I 70, Jefferson, CO

Built 1978 Load: 32.7 t ADT: 4,517

FRANKLIN ST

Good

Over: LAKE ERIE TRIB

0.1 MI S OF 144TH AVE, Adams, CO

Built 2005 Load: 32.7 t ADT: 338

COLORADO BLVD.

Good

Over: BIG DRY CREEK

0.5 MI S of 168th AVENUE, Adams, CO

Built 2014 Load: 32.7 t ADT: 3,245

E. 120TH AVE.

Good

Over: LOCAL DRAINAGE

0.2 MI W OF HAYSMOUNT RD, Adams, CO

Built 2007 Load: 32.7 t ADT: 3,067

136th AVE

Good

Over: FULTON DITCH

.4 MI W OF SABLE BLVD/SH2, Adams, CO

Built 2015 Load: 32.7 t ADT: 2,602

E. 143RD AVE

Good

Over: LAKE ERIE TRIB.

0.1 MI E OF FRANKLIN ST, Adams, CO

Built 2005 Load: 32.7 t ADT: 50

168TH AVENUE

Good

Over: BRANTNER DITCH

0.2 MILE W. OF PEORIA ST., Adams, CO

Built 2012 Load: 32.7 t ADT: 4,622

COTTONWOOD DRIVE

Good

Over: NORTH MONUMENT CREEK

0.5 MI. FROM E. PINE LOOP, El Paso, CO

Built 2014 Load: 32.7 t ADT: 100

ILIFF AVENUE

Good

Over: CHERRY CREEK

JUST E OF CHERRY CREEK DR, Arapahoe, CO

Built 1981 Load: 32.7 t ADT: 12,577

70TH AVENUE

Good

Over: FARMERS HIGHLINE CANAL

0.3 MI E OF QUAKER STREET, Jefferson, CO

Built 1993 Load: 32.7 t ADT: 231

CARR DRIVE

Good

Over: FARMERS HIGHLINE CANAL

.25 MI NORTH OF 74TH AVE, Jefferson, CO

Built 1975 Load: 32.7 t ADT: 3,900

CARR DRIVE

Good

Over: CROKE CANAL

.30 MI NORTH OF 74TH AVE, Jefferson, CO

Built 1975 Load: 32.7 t ADT: 3,900

DEFRAME CT

Good

Over: LOCAL DRAINAGE

JUST S OF WYNDHAM PARK, Jefferson, CO

Built 1999 Load: 32.7 t ADT: 64

INDIANA STREET

Good

Over: BIG DRY CREEK

.25 MI N OF CANDELAS PKWY, Jefferson, CO

Built 2019 Load: 32.7 t ADT: 20,390

OAK STREET

Good

Over: VAN BIBBER CREEK

JUST SOUTH OF 58TH AVE, Jefferson, CO

Built 2001 Load: 32.7 t ADT: 2,067

VANCE DRIVE

Good

Over: LITTLE DRY CREEK

0.1 MI SOUTH OF 80TH AVE, Jefferson, CO

Built 1975 Load: 32.7 t ADT: 2,608

SMITH ROAD

Good

Over: LOCAL DRAINAGE

0.25 MI E OF SCRANTON, Adams, CO

Built 2014 Load: 32.7 t ADT: 1,787

SMITH ROAD

Good

Over: FIRST CREEK

0.2 MI W of E-470, Adams, CO

Built 2015 Load: 32.7 t ADT: 2,886

MANSFIELD AVE

Good

Over: WEST TOLLGATE CREEK

.5 MILE E OF BUCKLEY RD, Arapahoe, CO

Built 1979 Load: 32.7 t ADT: 3,165

COUNTY ROAD 28

Good

Over: TRIB N.FORK CIMARRON RVR

1.0 MI S OF CR M, Baca, CO

Built 1935 Load: 32.7 t ADT: 58

COUNTY ROAD 36

Good

Over: DRY CREEK

2 MI S OF SH 160, Baca, CO

Built 1939 Load: 32.7 t ADT: 102

Lefthand Canyon Dr

Good

Over: Lefthand Creek

0.75 Mi W of Lee Hill Dr, Boulder, CO

Built 2019 Load: 32.7 t ADT: 1,078

Monarch Road

Good

Over: Dry Creek

800 ft S of N 79th St, Boulder, CO

Built 2019 Load: 32.7 t ADT: 349

Co Rd 39 (65th St)

Good

Over: LYKINS GULCH

0.8 Mi N of Nelson Rd, Boulder, CO

Built 2012 Load: 32.7 t ADT: 741

Fairways Drive

Good

Over: Local Drainage

.4 Mi S of Neva Rd, Boulder, CO

Built 2005 Load: 32.7 t ADT: 622

Golf Club Drive

Good

Over: Local Drainage

0.1 Mi So of Hogan Ct, Boulder, CO

Built 2005 Load: 32.7 t ADT: 644

Golf Club Drive

Good

Over: Local Drainage

0.4 Mi So of Hogan Ct, Boulder, CO

Built 2005 Load: 32.7 t ADT: 318

County Road 44

Good

Over: Little Thompson River

0.4 Mi E of Hwy I-25, Weld, CO

Built 2018 Load: 32.7 t ADT: 2,273

Interlocken Loop N

Good

Over: W. Flatiron Crossing Dr.

400 Ft N. of Interlocken, Broomfield, CO

Built 2000 Load: 32.7 t ADT: 6,228

Showing 6,251-6,300 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.