Total bridges
96
Public highway bridges in Routt County
County profile · official public datasets
Routt County, CO
96 public highway bridges tracked in the FHWA National Bridge Inventory: 43.8% rated Good, 50% Fair, 6.3% Poor.
- 96
- Public bridges
- 43.8%
- Good condition
- 6.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Routt County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 41st
- of 64 on Poor share
- 6.3%
- Poor-condition share
- 96
- 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.
Routt County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Routt County ranks #41 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Routt County, Colorado contains 96 public highway bridges. Roughly 43.8% are rated “Good,” 50% “Fair,” and 6.3% “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
43.8%
42 of 96 rated 7-9
Fair condition
50%
48 of 96 rated 5-6
Poor condition
6.3%
6 of 96 rated 4 or below
In-state Poor-share rank
#41 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 96 NBI-tracked bridges by lowest applicable component rating.
Good 43.8% (42)
Fair 50% (48)
Poor 6.3% (6)
Routt County's Poor-condition bridges carry 11,736 vehicle crossings a day
That is 6.5% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,956 crossings a day against 1,156 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 96 of 96 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
19.8% of Routt County's bridges have passed the 50-year mark
19 of the 96 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 43.8% 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 54.5% of the county's Poor-condition bridge traffic
US 40 ML over SHELTON DITCH, built 1954, carries 6,400 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 6-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 11,736 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Routt County's bridges were built
96 bridges with a recorded construction year, grouped by decade
- 1930s 5
1930–1939
5 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 8
1950–1959
8 bridges
- 1960s 2
1960–1969
2 bridges
- 1970s
1970–1979
13 bridges
- 1980s
1980–1989
30 bridges
- 1990s
1990–1999
19 bridges
- 2000s 9
2000–2009
9 bridges
- 2010s 9
2010–2019
9 bridges
What this shows Construction peaked in the 1980s, when 30 of the county's bridges still in the inventory were built, which is 31.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1984) matches the Colorado average (1982).
How Routt County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Routt County in number of bridges, with their condition splits. Its 6.3% Poor share is the 4th-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 |
|---|---|---|---|---|---|
| Baca County | 106 | 21.7% | 72.6% | 5.7% | 1963 |
| La Plata County | 102 | 54.9% | 43.1% | 2% | 1986 |
| Gunnison County | 100 | 36% | 57% | 7% | 1981 |
| Routt County (this page) | 96 | 43.8% | 50% | 6.3% | 1984 |
| Huerfano County | 94 | 30.9% | 62.8% | 6.4% | 1975 |
| Grand County | 88 | 43.2% | 51.1% | 5.7% | 1986 |
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 Routt 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 Routt County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (96 bridges here).
- Del Norte County, CA · 96 bridges
- Blaine County, ID · 96 bridges
- Clare County, MI · 96 bridges
- Menominee County, MI · 96 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 bridges (96)
County Road 37
FairOver: Fish Creek
2.5 Mi E of Co Rd 37A, Routt, CO
Built 1990 Load: 15.6 t ADT: 49
County Road 64A
FairOver: Elk River
0.3 Mi S of Co Rd 64, Routt, CO
Built 1980 Load: 16.6 t ADT: 86
County Road 29
FairOver: Trout Creek
8.0 Mi S of Co Rd 27, Routt, CO
Built 1967 Load: 17.1 t ADT: 38
Third Street
FairOver: Dry Creek
0.2 Mi So of US Hwy 40, Routt, CO
Built 1989 Load: 19.8 t ADT: 1,004
SH 131 ML
FairOver: CITY STREET
IN OAK CREEK, Routt, CO
Built 1935 Load: 20.0 t ADT: 2,800
SH 131 ML
FairOver: YAMPA RIVER
0.5 MI S OF PHIPPSBURG, Routt, CO
Built 1936 Load: 20.0 t ADT: 1,700
County Road 8
FairOver: Phillips Creek
0.5 Mi E of St Hwy 131, Routt, CO
Built 1950 Load: 20.2 t ADT: 28
County Road 64
FairOver: North Fork Elk River
8.5 Mi NE of Co Rd 129, Routt, CO
Built 1955 Load: 21.8 t ADT: 160
SH 131 ML
FairOver: EGERIA CREEK
40 MI S of STMBOAT SPRNGS, Routt, CO
Built 1948 Load: 21.8 t ADT: 1,000
County Road 56
FairOver: Elkhead Creek
2.5 M E of Moffat Co Line, Routt, CO
Built 1950 Load: 22.3 t ADT: 21
Steamboat Blvd.
FairOver: Fish Creek
1.8 Mi E of Mt Werner Rd, Routt, CO
Built 1982 Load: 22.8 t ADT: 1,402
County Road 129
FairOver: Little Snake River
48.6 Mi N of US Hwy 40, Routt, CO
Built 1975 Load: 23.4 t ADT: 85
County Road 129
FairOver: Mad Creek
5.4 Mi N of US Hwy 40, Routt, CO
Built 1981 Load: 23.9 t ADT: 2,762
County Road 52E
FairOver: Elk River
0.4 Mi W of Co Rd 129, Routt, CO
Built 1981 Load: 24.1 t ADT: 227
County Road 129B
FairOver: Mid Fk. Little Snake Rvr
0.3 Mi NE of Co Rd 129, Routt, CO
Built 1985 Load: 24.5 t ADT: 23
County Road 27
FairOver: S.P. RR
11.3 Mi N of St Hwy 131, Routt, CO
Built 1975 Load: 24.7 t ADT: 802
County Road 70
FairOver: Morgan Creek
1.4 Mi E of Co Rd 80, Routt, CO
Built 1995 Load: 25.5 t ADT: 90
SH 131 ML
FairOver: CHIMNEY ROCK CREEK
4 MI NO OF JCT SH 134, Routt, CO
Built 1938 Load: 26.4 t ADT: 1,000
County Road 16
FairOver: Yampa River
100 Ft S of Co Rd 14, Routt, CO
Built 1987 Load: 26.8 t ADT: 1,791
County Road 213
FairOver: Elk River
40 Ft E of Co Rd 64, Routt, CO
Built 1984 Load: 26.8 t ADT: 110
County Road 76
FairOver: Yampa River
0.6 Mi N of US Hwy 40, Routt, CO
Built 1978 Load: 27.3 t ADT: 513
Rollingstone Lane
FairOver: Fish Creek
150 ft N of Pine Grove, Routt, CO
Built 1990 Load: 27.3 t ADT: 2,404
County Road 360
FairOver: Yampa River
0.3 Mi W of US Hwy 40, Routt, CO
Built 1998 Load: 28.0 t ADT: 2,519
US 40 ML
FairOver: WALTON CREEK
SE edge of Stmboat Sprngs, Routt, CO
Built 1990 Load: 28.4 t ADT: 9,200
US 40 ML
FairOver: FISH CREEK
IN STEAMBOAT SPRINGS, Routt, CO
Built 1980 Load: 28.7 t ADT: 28,000
County Road 67
FairOver: S F Williams Fork River
5.0 Mi S of Co Rd 29, Routt, CO
Built 1993 Load: 29.1 t ADT: 24
US 40 ML
FairOver: YAMPA RIVER
15 MI E OF JCT SH 13, Routt, CO
Built 1967 Load: 29.2 t ADT: 4,200
US 40 ML
FairOver: MT WERNER ROAD
IN STEAMBOAT SPRINGS, Routt, CO
Built 1980 Load: 29.9 t ADT: 23,000
SH 131 ML
FairOver: CHIMNEY ROCK CREEK
1.5 MI S OF YAMPA, Routt, CO
Built 1938 Load: 30.7 t ADT: 860
County Road 14
FairOver: Yampa River
0.3 Mi W of US Hwy 40, Routt, CO
Built 1988 Load: 30.9 t ADT: 674
County Road 179
FairOver: Trout Creek
1.5 mi S of US Hwy 40, Routt, CO
Built 1985 Load: 30.9 t ADT: 308
County Road 129
FairOver: S.Fk Little Snake River
42.6 Mi N of US Hwy 40, Routt, CO
Built 1975 Load: 31.8 t ADT: 131
County Rd 179
FairOver: Yampa River
0.8 Mi S of US Hwy 40, Routt, CO
Built 1984 Load: 32.7 t ADT: 614
Fish Crk Falls Rd
FairOver: Spring Creek
200 Ft SE of 3rd Street, Routt, CO
Built 1973 Load: 32.7 t ADT: 5,949
US 40 ML
FairOver: DRY CREEK
IN HAYDEN, Routt, CO
Built 1992 Load: 32.7 t ADT: 4,200
SH 131 ML
FairOver: MCKINNIS CREEK
4 MI S OF STMBT.SPRINGS, Routt, CO
Built 2001 Load: 32.7 t ADT: 4,600
US 40 ML
FairOver: N FK ELK RIVER
7.7 MI W OF Stmbt Sprngs, Routt, CO
Built 1976 Load: 32.9 t ADT: 5,100
County Road 64
FairOver: Willow Creek
2.0 Mi NW of Co Rd 129, Routt, CO
Built 1950 Load: 33.3 t ADT: 487
County Road 179
FairOver: Trout Creek
4.1 Mi S of US Hwy 40, Routt, CO
Built 1985 Load: 37.7 t ADT: 124
County Road 54
FairOver: Elk River
1.3 Mi W of Co Rd 129, Routt, CO
Built 1987 Load: 43.6 t ADT: 183
Pahwintah Street
FairOver: Soda Creek
200 ft So of Merrit St, Routt, CO
Built 1979 Load: 49.7 t ADT: 463
County Road 129
FairOver: Elk River
18.1 Mi N of US Hwy 40, Routt, CO
Built 1981 Load: 51.2 t ADT: 2,058
County Road 67
FairOver: Beaver Creek
5.9 Mi S of Co Rd 29, Routt, CO
Built 2002 Load: 51.6 t ADT: 23
SH 131 ML
FairOver: YAMPA RIVER
2 MI N OF YAMPA, Routt, CO
Built 1992 Load: 57.1 t ADT: 1,700
County Road 44
FairOver: Elk River
3.8 Mi W of Co Rd 129, Routt, CO
Built 1985 Load: 63.5 t ADT: 579
County Road 53
FairOver: Dry Creek
3.6 Mi S of US Hwy 40, Routt, CO
Built 1975 Load: 99.9 t ADT: 165
Oak Street
FairOver: Soda Creek
100 ft E of 11th Street, Routt, CO
Built 1970 Load: 99.9 t ADT: 3,918
11th Street
FairOver: Soda Creek
100 ft S of Oak Street, Routt, CO
Built 1950 Load: 99.9 t ADT: 3,112
County Road 36
GoodOver: Soda Creek
1.8 Mi N of Amethyst Dr, Routt, CO
Built 1979 Load: 12.2 t ADT: 922
NFSR 503.1
GoodOver: KING SOLOMON CREEK
1.2 MI. S OF NFSR 550.1, Routt, CO
Built 1982 Load: 17.5 t ADT: 50
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.