Total bridges
174
Public highway bridges in Eagle County
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.
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.
When Eagle County's bridges were built
174 bridges with a recorded construction year, grouped by decade
- 1930s 6
1930–1939
6 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 3
1950–1959
3 bridges
- 1960s 10
1960–1969
10 bridges
- 1970s
1970–1979
58 bridges
- 1980s
1980–1989
28 bridges
- 1990s 23
1990–1999
23 bridges
- 2000s 15
2000–2009
15 bridges
- 2010s 22
2010–2019
22 bridges
- 2020s 5
2020–2029
5 bridges
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.
| 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.
Poor-condition bridges (9)
I 70 ML EBND
PoorOver: POLK CREEK
3.8 MI WEST OF EAGLE-SUMM, Eagle, CO
Built 1978 Load: 9.7 t ADT: 10,000
WATER STREET
PoorOver: EAGLE RIVER/RR
0.1 MI W OF HIGHWAY 24, Eagle, CO
Built 1934 Load: 12.6 t ADT: 231
I 70 FRONTAGE SR
PoorOver: UP RR SR
NE / DOTSERO INTERCHANGE, Eagle, CO
Built 1935 Load: 18.1 t ADT: 2,296
I 70 ML WBND
PoorOver: BLACK GORE CREEK
7.5 MI W OF VAIL PASS SUM, Eagle, CO
Built 1977 Load: 18.3 t ADT: 10,000
US 24 ML
PoorOver: UP RR
5 MI S OF REDCLIFF, Eagle, CO
Built 1941 Load: 20.4 t ADT: 1,600
FDR 747
PoorOver: TURKEY CR
2.6 MI. EAST OF REDCLIFF, Eagle, CO
Built 1975 Load: 21.1 t ADT: 5
W LAKE CREEK RD
PoorOver: EAST LAKE CREEK
0.2 MI W OF LAKE CREEK RD, Eagle, CO
Built 1940 Load: 22.7 t ADT: 1,102
I 70 ML WBND
PoorOver: TIMBER CREEK
11.4 MI W OF EAGLE-SUMMIT, Eagle, CO
Built 1977 Load: 25.0 t ADT: 10,000
BIGHORN ROAD
PoorOver: GORE CREEK
.15 MI EAST OF I70, Eagle, CO
Built 1961 Load: 46.4 t ADT: 243
Read our methodology - how this data is sourced, computed, and verified.
Related
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.