County profile · official public datasets

Mesa County, CO

319 public highway bridges tracked in the FHWA National Bridge Inventory: 35.1% rated Good, 63.3% Fair, 1.6% Poor.

319
Public bridges
35.1%
Good condition
1.6%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Mesa County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 19%
lowest Poor share in state
1.6%
Poor-condition share
319
public highway bridges
1981
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Mesa County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mesa County ranks #12 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.6%). Mesa County, Colorado contains 319 public highway bridges. Roughly 35.1% are rated “Good,” 63.3% “Fair,” and 1.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

319

Public highway bridges in Mesa County

Good condition

35.1%

112 of 319 rated 7-9

Fair condition

63.3%

202 of 319 rated 5-6

Poor condition

1.6%

5 of 319 rated 4 or below

In-state Poor-share rank

#12 of 64

Among Colorado counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 319 NBI-tracked bridges by lowest applicable component rating.

Good
35.1% (112)
Fair
63.3% (202)
Poor
1.6% (5)

Mesa County's Poor-condition bridges carry 14,172 vehicle crossings a day

That is 0.9% of the county's reported daily bridge traffic on 1.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,834 crossings a day against 3,721 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 319 of 319 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

40.4% of Mesa County's bridges have passed the 50-year mark

129 of the 319 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 35.1% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 58.6% of the county's Poor-condition bridge traffic

SH 141 ML over COLORADO RIVER, built 1968, carries 8,300 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 14,172 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Mesa County's bridges were built

319 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 82 of the county's bridges still in the inventory were built, which is 25.7% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1981) matches the Colorado average (1982).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Mesa County compares with Colorado's closest counties by inventory size

The 5 Colorado counties nearest Mesa County in number of bridges, with their condition splits. Its 1.6% Poor share is the 1st-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1982 is in line with the group.

Showing the 5 closest of 63 Colorado counties eligible for comparison.

Bridge inventory size and condition shares for Mesa County and the 5 Colorado counties closest to it in inventory size
County Bridges Poor
Arapahoe County 391 7.2%
Mesa County (this page) 319 1.6%
Boulder County 311 2.3%
Pueblo County 264 4.5%
Douglas County 263 2.3%
Las Animas County 207 14%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Mesa County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Mesa County, both outside Colorado so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside CO (319 bridges here).

Similar average build year

Nearest mean year-built outside CO (1981 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 319 Good 112 Fair 202 Poor 5

Good-condition bridges (112)

COUNTY ROAD 64.6

Good

Over: PLATEAU CREEK

1.2 MI SE Road N.5, Mesa, CO

Built 2014 Load: 19.5 t ADT: 23

PINION STREET

Good

Over: GROVE CREEK

JUST W OF RIVER COURT, Mesa, CO

Built 1990 Load: 20.0 t ADT: 46

I 70 ML EBND

Good

Over: COLORADO RIVER OVFLW

14.1 MI E OF JCT SH 65, Mesa, CO

Built 1980 Load: 20.3 t ADT: 9,000

I 70 ML WBND

Good

Over: COLORADO RIVER OVFLW

11.1MI W OF PARACHUTE, Mesa, CO

Built 1980 Load: 21.5 t ADT: 9,000

COUNTY ROAD 24.5

Good

Over: I 70 ML

3.3 MI W / HORIZON DRIVE, Mesa, CO

Built 1965 Load: 24.2 t ADT: 1,177

COUNTY ROAD 26

Good

Over: I 70 ML

1.8 MI W OF HORIZON DRIVE, Mesa, CO

Built 1965 Load: 24.4 t ADT: 2,525

COUNTY ROAD 24

Good

Over: I 70 ML

2.3 MI E OF JCT US 6 ML, Mesa, CO

Built 2005 Load: 24.5 t ADT: 13,931

I 70 ML

Good

Over: DRAW

7.2 MI E OF JCT SH 65 ML, Mesa, CO

Built 1959 Load: 25.0 t ADT: 17,000

26.5 Road

Good

Over: GRAND VALLEY CANAL

JUST N OF RD F.50, Mesa, CO

Built 2010 Load: 25.3 t ADT: 3,572

SH 65 ML

Good

Over: I 70 ML

10.3 MI N OF JCT SH 330, Mesa, CO

Built 1986 Load: 25.4 t ADT: 2,000

COUNTY ROAD J

Good

Over: HUNTER WASH

.8 MI E OF RD 20, Mesa, CO

Built 1988 Load: 25.6 t ADT: 945

SH 340 ML EBND

Good

Over: UP RR AND RIVERSIDE PKWY

W. SIDE OF GRAND JUNCTION, Mesa, CO

Built 1994 Load: 25.9 t ADT: 9,500

US50 RAMP

Good

Over: 4TH ST/UPPRR_N.FRK.BRNCH

US 50 ML @ Riverside Pkwy, Mesa, CO

Built 2010 Load: 25.9 t ADT: 8,455

COUNTY ROAD 38.05

Good

Over: ORCHARD MESA CANAL

.3 MI S OF US 6, Mesa, CO

Built 1986 Load: 26.2 t ADT: 1,565

RIVERSIDE PARKWAY

Good

Over: LEACH CREEK

Just E of Redlands Pkwy, Mesa, CO

Built 2008 Load: 26.8 t ADT: 4,151

COUNTY ROAD LE

Good

Over: VEGA CANAL

1.0 MI E OF RD 60.75, Mesa, CO

Built 1993 Load: 28.1 t ADT: 34

COUNTY ROAD 24

Good

Over: GRAND VALLEY CANAL

.3 MI N OF RD I, Mesa, CO

Built 2013 Load: 28.2 t ADT: 2,306

I 70 ML WBND

Good

Over: GRAND VALLEY CANAL

2.2 MI W OF HORIZON DRIVE, Mesa, CO

Built 1965 Load: 29.0 t ADT: 11,500

I 70 ML WBND

Good

Over: HORIZON DRIVE

E. EXIT OF GRAND JCT., Mesa, CO

Built 1965 Load: 29.0 t ADT: 11,500

SH 330 ML

Good

Over: PLATEAU CREEK

1.8 MI N OF JCT SH 65, Mesa, CO

Built 1975 Load: 29.0 t ADT: 1,300

SH 65 ML

Good

Over: PLATEAU CREEK

10 MI S OF JCT I 70, Mesa, CO

Built 1973 Load: 29.0 t ADT: 2,600

SH 141 ML

Good

Over: DRAW

6.5 MI S. OF GATEWAY, Mesa, CO

Built 1960 Load: 29.1 t ADT: 260

G Road

Good

Over: N Leach Creek

E. of 24 Rd, Mesa, CO

Built 2022 Load: 29.2 t ADT: 6,685

COUNTY ROAD 38.8

Good

Over: ORCHARD MESA CANAL

.1 MI S OF US 6, Mesa, CO

Built 1989 Load: 29.4 t ADT: 236

BUZZARD CREEK RD

Good

Over: BUZZARD CREEK

JUST S OF PE ROAD, Mesa, CO

Built 1987 Load: 29.5 t ADT: 470

SH 330 ML

Good

Over: PLATEAU CREEK

3.3 MI E OF JCT SH 65, Mesa, CO

Built 1975 Load: 29.5 t ADT: 1,300

County Road 8

Good

Over: Gov.Highline Canal

0.5 MI N of CR 5, Mesa, CO

Built 1986 Load: 29.6 t ADT: 200

15TH STREET

Good

Over: GRAND VALLEY CANAL

.1 MI S OF WELLINGTON AVE, Mesa, CO

Built 1984 Load: 29.7 t ADT: 7,210

COUNTY ROAD 23

Good

Over: I 70 ML

1.3 MI E OF JCT US 6 ML, Mesa, CO

Built 1965 Load: 29.7 t ADT: 2,411

COUNTY ROAD 30

Good

Over: GRAND VALLEY CANAL

.4 MI N OF US 6, Mesa, CO

Built 1996 Load: 30.0 t ADT: 8,822

COUNTY ROAD 45.5

Good

Over: NO NAME DITCH

1.6 MILES S OF DEBEQUE, Mesa, CO

Built 2008 Load: 30.3 t ADT: 872

COUNTY ROAD 45

Good

Over: COLORADO RIVER

.3 MI N OF I-70 (DEBEQUE), Mesa, CO

Built 1962 Load: 31.0 t ADT: 1,633

I 70 ML EBND

Good

Over: US 6 ML

11.1 MI E COLO-UTAH SL, Mesa, CO

Built 1973 Load: 31.2 t ADT: 4,200

COUNTY ROAD 64.3

Good

Over: BUZZARD CREEK

.5 MI N of RD 330E, Mesa, CO

Built 2018 Load: 31.4 t ADT: 175

SH 65 ML

Good

Over: DRAW

8 MI S. OF JCT I 70, Mesa, CO

Built 1976 Load: 31.7 t ADT: 2,000

COUNTY ROAD I.9

Good

Over: LOCAL DRAINAGE

AT CAMEO SHOOTING & EDU., Mesa, CO

Built 2022 Load: 31.8 t ADT: 296

Vega Dam Road

Good

Over: Vega Dam Spillway

Vega Dam, Mesa, CO

Built 1998 Load: 32.1 t ADT: 830

Early Settlers Rd

Good

Over: Leon Creek Feeder Canal

3.7 mi SE HWY 330/64.6 Rd, Mesa, CO

Built 1999 Load: 32.4 t ADT: 830

I 70 ML

Good

Over: DRAW

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

Built 1951 Load: 32.7 t ADT: 18,000

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

I 70 ML EBND

Good

Over: REED DRAIN

0.6 MI E OF JCT SH 139, Mesa, CO

Built 1970 Load: 32.7 t ADT: 5,500

US 6 ML

Good

Over: LITTLE SALT WASH

W. EDGE OF FRUITA, Mesa, CO

Built 1987 Load: 32.7 t ADT: 4,900

Canyon Creek Dr.

Good

Over: Entrance Creek

.5 MI N of S Broadway, Mesa, CO

Built 2023 Load: 32.7 t ADT: 103

COUNTY ROAD 34.6

Good

Over: GOVT. HIGHLINE CANAL

0.18 MI N OF COUNTY RD G, Mesa, CO

Built 1992 Load: 32.7 t ADT: 27

COUNTY ROAD 36

Good

Over: ORCHARD MESA CANAL NO. 1

0.1 MI N OF RD E.25, Mesa, CO

Built 2003 Load: 32.7 t ADT: 214

COUNTY ROAD 4

Good

Over: WEST SALT CREEK

2.0 MI NW OF CR S, Mesa, CO

Built 2010 Load: 32.7 t ADT: 25

COUNTY ROAD 6.5

Good

Over: GOVT. HIGHLINE CANAL

.5 MI N OF RD S, Mesa, CO

Built 1988 Load: 32.7 t ADT: 5

COUNTY ROAD G.7

Good

Over: PRICE DITCH

.1 MI E OF RD 36.30, Mesa, CO

Built 1950 Load: 32.7 t ADT: 650

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

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.