Total bridges
19
Public highway bridges in Gilpin County
County profile · official public datasets
Gilpin County, CO
19 public highway bridges tracked in the FHWA National Bridge Inventory: 10.5% rated Good, 89.5% Fair, 0% Poor.
- 19
- Public bridges
- 10.5%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Gilpin County posts a top-10% lowest Poor-condition share among rated counties in the state across rated county bridge inventory.
- Top 8%
- lowest Poor share in state
- 0%
- Poor-condition share
- 19
- 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.
Gilpin County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Gilpin County ranks #5 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Gilpin County, Colorado contains 19 public highway bridges. Roughly 10.5% are rated “Good,” 89.5% “Fair,” and 0% “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
10.5%
2 of 19 rated 7-9
Fair condition
89.5%
17 of 19 rated 5-6
Poor condition
0%
0 of 19 rated 4 or below
In-state Poor-share rank
#5 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 19 NBI-tracked bridges by lowest applicable component rating.
Good 10.5% (2)
Fair 89.5% (17)
Poor 0% (0)
21.1% of Gilpin County's bridges have passed the 50-year mark
4 of the 19 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 10.5% 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.
When Gilpin County's bridges were built
19 bridges with a recorded construction year, grouped by decade
- 1930s
1930–1939
4 bridges
- 1980s
1980–1989
5 bridges
- 1990s
1990–1999
6 bridges
- 2000s
2000–2009
3 bridges
- 2010s 1
2010–2019
1 bridges
What this shows Construction peaked in the 1990s, when 6 of the county's bridges still in the inventory were built, which is 31.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1984) matches the Colorado average (1982).
How Gilpin County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Gilpin County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1979 is 5 years newer.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Mineral County | 26 | 34.6% | 65.4% | 0% | 1973 |
| Custer County | 20 | 45% | 50% | 5% | 1972 |
| Gilpin County (this page) | 19 | 10.5% | 89.5% | 0% | 1984 |
| Lake County | 17 | 52.9% | 35.3% | 11.8% | 1985 |
| Alamosa County | 16 | 37.5% | 62.5% | 0% | 1985 |
| San Juan County | 13 | 53.8% | 38.5% | 7.7% | 1981 |
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 Gilpin 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 Gilpin County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (19 bridges here).
- Blaine County, NE · 19 bridges
- Thomas County, NE · 19 bridges
- Foster County, ND · 19 bridges
- Aguada County, PR · 19 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 (19)
GREGORY STREET
FairOver: GREGORY GULCH
0.01 MI WEST OF SH119, Gilpin, CO
Built 1933 Load: 15.7 t ADT: 3,289
CENTRAL CITY PRKWY
FairOver: CLEAR CREEK
0.5 MI. W OF I-70, Gilpin, CO
Built 2004 Load: 25.9 t ADT: 2,621
BOBTAIL ROAD
FairOver: BOBTAIL CREEK
S OF MARDI GRAS CASINO, Gilpin, CO
Built 1999 Load: 27.3 t ADT: 698
COUNTY ROAD 16
FairOver: SOUTH BOULDER CREEK
6.6 MI W SH119, Gilpin, CO
Built 1987 Load: 31.9 t ADT: 238
COUNTY ROAD 16
FairOver: SOUTH BOULDER CREEK
1.0 MI W OF SH 119, Gilpin, CO
Built 1989 Load: 33.0 t ADT: 379
COUNTY ROAD 16
FairOver: SOUTH BOULDER CREEK
6.9 M W SH 119, Gilpin, CO
Built 1988 Load: 33.9 t ADT: 232
FIRE STATION DR
FairOver: NORTH CLEAR CREEK
0.1 MI N OF CHASE ST, Gilpin, CO
Built 1995 Load: 34.0 t ADT: 16
SH 119 ML
FairOver: COTTONWOOD CREEK
1.9 MI NO OF JCT US 6, Gilpin, CO
Built 1939 Load: 34.9 t ADT: 9,400
119 SR/CDOT ACC RD
FairOver: N FK CLEAR CREEK AR
0.1 MI N OF JCT US 6, Gilpin, CO
Built 1939 Load: 35.5 t ADT: 10
CHASE STREET
FairOver: NORTH CLEAR CREEK
N OF SILVERHAWK CASINO, Gilpin, CO
Built 1994 Load: 36.0 t ADT: 166
SH 119 ML
FairOver: SOUTH BOULDER CREEK
ROLLINSVILLE, Gilpin, CO
Built 1989 Load: 36.9 t ADT: 3,100
VIRGINIA CANYON RD
FairOver: CENTRAL CITY PKWY
0.7 MI S OF CENTRAL CITY, Gilpin, CO
Built 2004 Load: 40.8 t ADT: 539
SH 119 ML
FairOver: SMITH HILL CREEK
4.4 MI NO OF JCT US 6, Gilpin, CO
Built 1939 Load: 42.4 t ADT: 9,400
MILL STREET
FairOver: NORTH CLEAR CREEK
INTERSECTION WITH SH119, Gilpin, CO
Built 1994 Load: 44.8 t ADT: 2,123
MAIN STREET
FairOver: NORTH CLEAR CREEK
AT INTERSECT WITH SH119, Gilpin, CO
Built 2004 Load: 51.1 t ADT: 1,836
SH 119 ML
FairOver: UP RR
ROLLINSVILLE, Gilpin, CO
Built 1989 Load: 51.3 t ADT: 3,100
RICHMAN STREET
FairOver: NORTH CLEAR CREEK
JUST S OF SH 119, Gilpin, CO
Built 1998 Load: 51.6 t ADT: 2,291
SH 119_Main St. S.
GoodOver: NORTH CLEAR CREEK
1.0 MI E of BLACK HAWK, Gilpin, CO
Built 2013 Load: 35.8 t ADT: 14,000
S BEAVER CRK RD
GoodOver: SOUTH BOULDER CREEK
S BEAVER CK RD AT SH72, Gilpin, CO
Built 1995 Load: 44.2 t ADT: 798
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.