Total bridges
18
Public highway bridges in Rolette County
County profile · official public datasets
Rolette County, ND
18 public highway bridges tracked in the FHWA National Bridge Inventory: 66.7% rated Good, 33.3% Fair, 0% Poor.
- 18
- Public bridges
- 66.7%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Rolette 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
- 18
- public highway bridges
- 1971
- 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.
Rolette County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Rolette County ranks #4 of 53 North Dakota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Rolette County, North Dakota contains 18 public highway bridges. Roughly 66.7% are rated “Good,” 33.3% “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
66.7%
12 of 18 rated 7-9
Fair condition
33.3%
6 of 18 rated 5-6
Poor condition
0%
0 of 18 rated 4 or below
In-state Poor-share rank
#4 of 53
Among North Dakota counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 18 NBI-tracked bridges by lowest applicable component rating.
Good 66.7% (12)
Fair 33.3% (6)
Poor 0% (0)
50% of Rolette County's bridges have passed the 50-year mark
9 of the 18 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 66.7% 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.
When Rolette County's bridges were built
18 bridges with a recorded construction year, grouped by decade
- 1930s
1930–1939
2 bridges
- 1940s
1940–1949
2 bridges
- 1960s
1960–1969
3 bridges
- 1970s
1970–1979
5 bridges
- 1980s 1
1980–1989
1 bridges
- 1990s
1990–1999
3 bridges
- 2000s
2000–2009
2 bridges
What this shows Construction peaked in the 1970s, when 5 of the county's bridges still in the inventory were built, which is 27.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1971) matches the North Dakota average (1975).
How Rolette County compares with North Dakota's closest counties by inventory size
The 5 North Dakota counties nearest Rolette County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1975 is in line with the group.
Showing the 5 closest of 52 North Dakota counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Nelson County | 23 | 34.8% | 47.8% | 17.4% | 1975 |
| Griggs County | 22 | 63.6% | 27.3% | 9.1% | 1974 |
| Sioux County | 22 | 59.1% | 36.4% | 4.5% | 1970 |
| Foster County | 19 | 47.4% | 47.4% | 5.3% | 1980 |
| Rolette County (this page) | 18 | 66.7% | 33.3% | 0% | 1971 |
| Divide County | 13 | 30.8% | 61.5% | 7.7% | 1975 |
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 Rolette 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 Rolette County, both outside North Dakota so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside ND (18 bridges here).
- Haskell County, KS · 18 bridges
- Charlevoix County, MI · 18 bridges
- Ciales County, PR · 18 bridges
- Briscoe County, TX · 18 bridges
Similar average build year
Nearest mean year-built outside ND (1971 here).
- Wayne County, MI · avg 1971 · 1,026 bridges
- Baltimore County, MD · avg 1971 · 783 bridges
- Washington County, PA · avg 1971 · 655 bridges
- Linn County, OR · avg 1971 · 566 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (18)
COUNTY ROAD
FairOver: CREEK
8 SOUTH 3 WEST DUNSEITH, Rolette, ND
Built 1940 Load: 4.5 t ADT: 10
COUNTY ROAD
FairOver: MUD CREEK
8 WEST 4 NORTH OF ROLETTE, Rolette, ND
Built 1935 Load: 15.3 t ADT: 20
COUNTY ROAD
FairOver: INDIAN CREEK
8 SOUTH 3 WEST DUNSEITH, Rolette, ND
Built 1976 Load: 27.1 t ADT: 10
US HIGHWAY 5
FairOver: WILLOW CREEK
1 WEST OF U.S. HWY 281, Rolette, ND
Built 1947 Load: 28.9 t ADT: 1,350
COUNTY HIGHWAY
FairOver: OX CREEK
2 EAST 2 SOUTH ROLETTE, Rolette, ND
Built 1976 Load: 29.5 t ADT: 25
COUNTY HIGHWAY
FairOver: OX CREEK
2 WEST 4 SOUTH ROLETTE, Rolette, ND
Built 1976 Load: 31.0 t ADT: 20
ND HIGHWAY 30
GoodOver: CREEK
2 SOUTH US 281, Rolette, ND
Built 1967 Load: 17.2 t ADT: 830
ND HIGHWAY 66
GoodOver: OX CREEK
1 EAST OF ROLETTE, Rolette, ND
Built 1963 Load: 21.2 t ADT: 580
COUNTY HIGHWAY
GoodOver: OX CREEK
17 NORTH 5 WEST OF RUGBY, Rolette, ND
Built 1970 Load: 24.9 t ADT: 65
ND HIGHWAY 3
GoodOver: OX CREEK
NORTH OF RUGBY, Rolette, ND
Built 1986 Load: 27.0 t ADT: 1,050
COUNTY HIGHWAY
GoodOver: WILLOW CREEK
1 NORTH OF DUNSEITH, Rolette, ND
Built 1930 Load: 28.4 t ADT: 25
COUNTY HIGHWAY
GoodOver: OX CREEK
17 NORTH 5 WEST OF RUGBY, Rolette, ND
Built 1970 Load: 32.4 t ADT: 65
COUNTY HIGHWAY
GoodOver: WILLOW CREEK
3 WEST 4 NORTH DUNSEITH, Rolette, ND
Built 2001 Load: 40.8 t ADT: 80
COUNTY HIGHWAY
GoodOver: MUD CREEK
7 SOUTH DUNSEITH, Rolette, ND
Built 1994 Load: 40.8 t ADT: 10
COUNTY HIGHWAY
GoodOver: OX CREEK
3 SOUTH OF ROLETTE, Rolette, ND
Built 2006 Load: 40.8 t ADT: 100
ND HIGHWAY 3
GoodOver: WOLF CREEK
1 NORTH OF ND 66, Rolette, ND
Built 1992 Load: 45.5 t ADT: 930
ND HIGHWAY 66
GoodOver: WOLF CREEK
1 EAST OF ND 3, Rolette, ND
Built 1961 Load: 46.4 t ADT: 510
ND HIGHWAY 3
GoodOver: MUD CREEK
2 NORTH OF ND 66, Rolette, ND
Built 1992 Load: 77.8 t ADT: 940
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.