State profile · Below national median SD

Colorado bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Colorado — drawn straight from the FHWA National Bridge Inventory.

8,965
Public bridges
32.0%
Good condition
4.3%
Poor condition
4.3%
Structurally deficient

Total Bridges

8,965

Public highway bridges in Colorado

Good Condition

32.0%

2,865 bridges rated 7-9

-18.0pp vs 50% benchmark

Poor Condition

4.3%

387 bridges rated 0-4

Structurally Deficient

4.3%

387 bridges flagged for repair priority

-2.7pp vs national avg 7.0%

Colorado vs national bridge condition

Colorado — Good condition share 32.0%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Colorado — Structurally deficient share 14.4%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Colorado (FHWA NBI)

Colorado31.95761293920803%54.210819854991634%GoodFairPoorStructurally Deficient
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 on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Colorado on the same metric.

47

Tennessee

3.97% top marginal rate
Structure
Progressive
Burden @ $100K
$20,426

24

Maryland

4.27% top marginal rate
Structure
Progressive
Burden @ $100K
$5,527
Selected

08

Colorado

4.32% top marginal rate
Structure
Progressive
Burden @ $100K
$8,965

41

Oregon

4.46% top marginal rate
Structure
Progressive
Burden @ $100K
$8,310

39

Ohio

4.54% top marginal rate
Structure
Progressive
Burden @ $100K
$26,753

Bridges Needing Most Attention in Colorado

Six lowest-condition bridges in Colorado, ranked by composite NBI rating. Each is inspected at least every 24 months.

County Road 59

Structurally Deficient

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

Structurally Deficient

Over: NORTH CRESTONE CREEK

IN TOWN OF CRESTONE, Saguache, CO

Built 1991 Load: 2.3 t ADT: 65

CO Rd 32

Structurally Deficient

Over: Feeder Ditch

0.28 MI E of Co Rd 75, Las Animas, CO

Built 1970 Load: 2.7 t ADT: 7

POTOMAC STREET

Structurally Deficient

Over: OBRIAN CANAL

0.2 MILE NORTH OF SH 2, Adams, CO

Built 1940 Load: 3.8 t ADT: 190

88TH AVENUE

Structurally Deficient

Over: KIOWA CREEK

0.1 MI E OF WOLF CREEK RD, Adams, CO

Built 1950 Load: 4.5 t ADT: 532

IRR# CO RD 500

Poor

Over: CAT CREEK

NEAR CAMADO, Archuleta, CO

Built 1927 Load: 4.7 t ADT: 36

All Bridges in Colorado

SH 95 ML

Good

Over: LITTLE DRY CREEK TRAIL

500 ft N of 76th Ave, Adams, CO

Built 2001 Load: 32.7 t ADT: 38,000

S. 4th Ave.

Good

Over: FULTON CANAL

0.5 MI N. of 136th Ave., Adams, CO

Built 2007 Load: 32.7 t ADT: 9,408

SH 53 SERVICE RD.

Good

Over: 64TH ST DRAIN CANAL AR

.1 MI W OF 64TH & BRODWAY, Adams, CO

Built 1993 Load: 32.7 t ADT: 5,000

E-470 ML

Good

Over: Local Drainage

42.45 MI FROM I25, Adams, CO

Built 2002 Load: 32.7 t ADT: 36,702

ACOMA STREET

Good

Over: FARMERS HIGHLINE CA

.8 MI N OF 104TH AVENUE, Adams, CO

Built 1960 Load: 32.7 t ADT: 126

130TH AVE

Good

Over: LOCAL DRAINAGE

0.2 MI E OF HOLLY ST, Adams, CO

Built 2006 Load: 32.7 t ADT: 1,942

152ND AVENUE

Good

Over: BIG DRY CREEK TRIBUTARY

0.3 MI EAST OF WASHINGTON, Adams, CO

Built 2000 Load: 32.7 t ADT: 5,431

GRANT STREET

Good

Over: LOCAL DRAINAGE

JUST N OF 140TH AVE, Adams, CO

Built 2018 Load: 32.7 t ADT: 4,074

QUEBEC ST

Good

Over: BRANTNER GULCH

0.5MI N OF 120TH AVE, Adams, CO

Built 2005 Load: 32.7 t ADT: 9,456

QUEBEC STREET

Good

Over: BRANTNER GULCH TRIB

.35 MI N OF 128TH AVE, Adams, CO

Built 2003 Load: 32.7 t ADT: 3,519

THORNTON PKWY

Good

Over: NIVER CREEK

.25 MI W OF I25, Adams, CO

Built 1990 Load: 32.7 t ADT: 20,525

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

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

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

ORCHARD PARKWAY

Good

Over: LOCAL DRAINAGE

0.2 MI EAST OF HURON ST., Adams, CO

Built 2015 Load: 32.7 t ADT: 4,895

ILIFF AVENUE

Good

Over: CHERRY CREEK

JUST E OF CHERRY CREEK DR, Arapahoe, CO

Built 1981 Load: 32.7 t ADT: 12,577

MANSFIELD AVE

Good

Over: WEST TOLLGATE CREEK

.5 MILE E OF BUCKLEY RD, Arapahoe, CO

Built 1979 Load: 32.7 t ADT: 3,165

EASTER AVENUE

Good

Over: BIG DRY CREEK

.5 M EAST OF UNIVERSITY, Arapahoe, CO

Built 1971 Load: 32.7 t ADT: 2,332

EMERGENCY ACCESS

Good

Over: DRAINAGE DITCH

SW OF DEER TR HIGH SCHOOL, Arapahoe, CO

Built 2018 Load: 32.7 t ADT: 1

E-470 NB

Good

Over: Coal Creek

18.44 MI FROM I25, Arapahoe, CO

Built 1997 Load: 32.7 t ADT: 19,715

I 70 ML

Good

Over: DRAINAGE DITCH

NEAR STRASBURG, Arapahoe, CO

Built 1999 Load: 32.7 t ADT: 17,000

LAKE AVE

Good

Over: LITTLES CREEK

0.04 MI E OF SPOTSWOOD ST, Arapahoe, CO

Built 2014 Load: 32.7 t ADT: 9,051

MINERAL AVENUE

Good

Over: SOUTH PLATTE RIVER

0.4 MI W OF SANTA FE DR, Arapahoe, CO

Built 1988 Load: 32.7 t ADT: 32,082

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

US160 ML

Good

Over: MCCABE CREEK

San Juan St & S 6th St, Archuleta, CO

Built 2019 Load: 32.7 t ADT: 16,600

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

SH 101 ML

Good

Over: PURGATOIRE RIVER

2.6 MI SOUTH OF JCT US 50, Bent, CO

Built 1966 Load: 32.7 t ADT: 450

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

Wildwood Road

Good

Over: Bear Canyon Creek

150 Ft W of Bear Mtn. Rd, Boulder, CO

Built 1970 Load: 32.7 t ADT: 242

48th CT

Good

Over: S. Goose Creek

30 Ft N of Pearl Parkway, Boulder, CO

Built 1986 Load: 32.7 t ADT: 641

Mohawk Drive

Good

Over: Bear Crk and Bike Path

0.25 Mi No of Baseline Rd, Boulder, CO

Built 1996 Load: 32.7 t ADT: 1,707

Aurora Avenue

Good

Over: Gregory Creek

15 Ft. W of 6th Street, Boulder, CO

Built 1980 Load: 32.7 t ADT: 226

27th Street

Good

Over: Goose Creek

50 ft N of Mapleton Ave, Boulder, CO

Built 2001 Load: 32.7 t ADT: 201

34th Street

Good

Over: Wonderland Creek

40 ft S. of Iris Ave, Boulder, CO

Built 2018 Load: 32.7 t ADT: 1,200

Gilpin Drive

Good

Over: Bear Canyon Creek

350 ft S of Evans Dr, Boulder, CO

Built 1997 Load: 32.7 t ADT: 281

Valmont Road

Good

Over: Elmers Twomile Creek

400 ft W of 28th, Boulder, CO

Built 2010 Load: 32.7 t ADT: 10,720

48th Street

Good

Over: Goose Creek

Just N. of Pearl St, Boulder, CO

Built 1980 Load: 32.7 t ADT: 664

Showing 6,551-6,600 of 8,965 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.