How many bridges are in Colorado?

Colorado has 8,965 public highway bridges tracked in the FHWA National Bridge Inventory. View detailed condition data for each bridge on PlainBridges.

What percentage of bridges in Colorado are structurally deficient?

4.3% of bridges in Colorado are classified as structurally deficient by the FHWA, compared to a national average of 7.0%.

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.

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026

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)

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.

Tennessee

3.97% top marginal rate

Structure: Progressive
Burden @ $100K: $20,426

Maryland

4.27% top marginal rate

Structure: Progressive
Burden @ $100K: $5,527

Selected

Colorado

4.32% top marginal rate

Structure: Progressive
Burden @ $100K: $8,965

Oregon

4.46% top marginal rate

Structure: Progressive
Burden @ $100K: $8,310

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

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Publisher	Kiznis Studio
Sources	FHWA National Bridge Inventory, public U.S. government datasets

Colorado vs national bridge condition

Condition Distribution

Counties (64)

Bridges Needing Most Attention in Colorado

County Road 59

COTTONWOOD ST

CO Rd 32

POTOMAC STREET

88TH AVENUE

IRR# CO RD 500

All Bridges in Colorado

I 70 ML EBND

I 70 ML WBND

RMP I70EB TO I25NB

RAMP TO PARK AVE

20TH STREET

HOV RAMP

I70 NB RMP,.75 MI.

RAMP TO I 70 WBND

RAMP TO PARK AV R

15TH STREET

PECOS STREET

I270 EB RMPTOI70EB

CNTPRK RMPTOWB I70

COLUMBINE STREET

CLAYTON STREET

FILLMORE ST.

I70 EBND ML

JOSEPHINE ST.

MONROE STREET

SH 2 COLO. BLVD.

I 70 ML WBND

I 70 ML EBND

I70 ML WBND

I 70 ML EBND

I70 ML WBND

I70 ML EBND

I 70 ML WBND

I 70 ML EBND

I 270 ML EBND

I 70 ML EBND

RMP/I25NB TO I70WB

RAMP TO I 70 EBND

RAMP TO I 70 EBND

I 70 ML

I 70 ML

E-470 NB

E-470 SB

US 6 RAMP B

23RD AVENUE

I 25 ML

KNOX CT

PERRY STREET

US 40 ML

US 40 RAMP

AURARIA PKWY RAMP

I25 EB RAMP A PKWY

RAMP TO I 25 NBND

I 25 SBND RAMP

US 285 ML

SH 88-FEDERAL BLVD

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