County profile · official public datasets

Eagle County, CO

174 public highway bridges tracked in the FHWA National Bridge Inventory: 39.7% rated Good, 55.2% Fair, 5.2% Poor.

174
Public bridges: 39.7%
Good condition: 5.2%
Poor condition

The verdict

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

Eagle County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

34th
of 64 on Poor share: 5.2%
Poor-condition share: 174
public highway bridges: 1984
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.

Eagle County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Eagle County ranks #34 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.2%). Eagle County, Colorado contains 174 public highway bridges. Roughly 39.7% are rated “Good,” 55.2% “Fair,” and 5.2% “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

174

Public highway bridges in Eagle County

Good condition

39.7%

69 of 174 rated 7-9

Fair condition

55.2%

96 of 174 rated 5-6

Poor condition

5.2%

9 of 174 rated 4 or below

In-state Poor-share rank

#34 of 64

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

Condition distribution

Share of 174 NBI-tracked bridges by lowest applicable component rating.

Good

39.7% (69)

Fair

55.2% (96)

Poor

5.2% (9)

Eagle County's Poor-condition bridges carry 35,477 vehicle crossings a day

That is 2.8% of the county's reported daily bridge traffic on 5.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,942 crossings a day against 5,144 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 174 of 174 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

27.6% of Eagle County's bridges have passed the 50-year mark

48 of the 174 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 39.7% 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 28.2% of the county's Poor-condition bridge traffic

I 70 ML WBND over TIMBER CREEK, built 1977, carries 10,000 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 9-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 35,477 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

6
1940s

4
1950s

3
1960s

10
1970s

58
1980s

28
1990s

23
2000s

15
2010s

22
2020s

5

What this shows Construction peaked in the 1970s, when 58 of the county's bridges still in the inventory were built, which is 33.3% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1984) matches the Colorado average (1982).

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

The 5 Colorado counties nearest Eagle County in number of bridges, with their condition splits. Its 5.2% Poor share is the 3rd-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1978 is 6 years newer.

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

Bridge inventory size and condition shares for Eagle County and the 5 Colorado counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Las Animas County	207	26.1%	59.9%	14%	1968
Otero County	195	24.6%	65.1%	10.3%	1973
Morgan County	192	47.9%	49.5%	2.6%	1986
Logan County	182	36.8%	54.4%	8.8%	1984
Eagle County (this page)	174	39.7%	55.2%	5.2%	1984
Garfield County	167	34.7%	64.1%	1.2%	1980

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 Eagle 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 Eagle County, both outside Colorado so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside CO (174 bridges here).

Hempstead County, AR · 174 bridges
Washington County, IN · 174 bridges
Lac qui Parle County, MN · 174 bridges
Sussex County, NJ · 174 bridges

Similar average build year

Nearest mean year-built outside CO (1984 here).

Hennepin County, MN · avg 1984 · 936 bridges
Duval County, FL · avg 1984 · 831 bridges
Bell County, TX · avg 1984 · 660 bridges
Steuben County, NY · avg 1984 · 627 bridges

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

All 174 Good 69 Fair 96 Poor 9

Fair-condition bridges (96)

Sort:

Eagle County Bridge Snapshot

Condition distribution

Eagle County's Poor-condition bridges carry 35,477 vehicle crossings a day

27.6% of Eagle County's bridges have passed the 50-year mark

One structure carries 28.2% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Fair-condition bridges (96)

SH 82 ML

STONEBRIDGE DRIVE

I 70 ML WBND

I 70 ML WBND

I 70 SERVICE RD SR

I 70 ML EBND

I 70 ML WBND

I 70 ML EBND

I 70 ML WBND

I 70 ML EBND

I 70 ML WBND

I 70 ML EBND

COTTON RANCH DR

CO RD S-14

KINNIKINNICK ROAD

MAIN GORE DRIVE

MEADOW DRIVE

WESTHAVEN DRIVE

I 70 ML WBND

I 70 ML EBND

I 70 ML WBND

I 70 ML EBND

I 70 ML EBND

I 70 ML WBND

I 70 ML WBND

I 70 ML EBND

FSR 703.1

AVON ROAD

VAIL ROAD

8510: BLUE LAKE RO

CEMETERY ROAD

I 70 ML EBND

I 70 ML EBND

NO DATA ENTERED

I 70 ML

EAGLE STREET

I 70 ML WBND

PRICE LANE

EAGLE STREET

I 70F SPUR

CTY RD 17/FDR 600

HOOKS LANE

TAYLOR STREET

I 70 ML EBND

STREAMSIDE ROAD

I 70 FRONTAGE

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