Total bridges
60
Public highway bridges in LaMoure County
County profile · official public datasets
LaMoure County, ND
60 public highway bridges tracked in the FHWA National Bridge Inventory: 48.3% rated Good, 40% Fair, 11.7% Poor.
- 60
- Public bridges
- 48.3%
- Good condition
- 11.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
LaMoure County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 35th
- of 53 on Poor share
- 11.7%
- Poor-condition share
- 60
- public highway bridges
- 1972
- 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.
LaMoure County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, LaMoure County ranks #35 of 53 North Dakota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.7%). LaMoure County, North Dakota contains 60 public highway bridges. Roughly 48.3% are rated “Good,” 40% “Fair,” and 11.7% “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
48.3%
29 of 60 rated 7-9
Fair condition
40%
24 of 60 rated 5-6
Poor condition
11.7%
7 of 60 rated 4 or below
In-state Poor-share rank
#35 of 53
Among North Dakota counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 60 NBI-tracked bridges by lowest applicable component rating.
Good 48.3% (29)
Fair 40% (24)
Poor 11.7% (7)
LaMoure County's Poor-condition bridges carry 314 vehicle crossings a day
That is 1% of the county's reported daily bridge traffic on 11.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 45 crossings a day against 359 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 60 of 60 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
40% of LaMoure County's bridges have passed the 50-year mark
24 of the 60 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 48.3% 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 44.6% of the county's Poor-condition bridge traffic
COUNTY HIGHWAY over JAMES RIVER, built 1950, carries 140 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 7-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 314 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When LaMoure County's bridges were built
60 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 3
1910–1919
3 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s
1930–1939
5 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s
1950–1959
7 bridges
- 1960s 4
1960–1969
4 bridges
- 1970s
1970–1979
12 bridges
- 1980s
1980–1989
11 bridges
- 1990s
1990–1999
5 bridges
- 2000s
2000–2009
5 bridges
- 2010s 1
2010–2019
1 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1970s, when 12 of the county's bridges still in the inventory were built, which is 20% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1972) matches the North Dakota average (1975).
How LaMoure County compares with North Dakota's closest counties by inventory size
The 5 North Dakota counties nearest LaMoure County in number of bridges, with their condition splits. Its 11.7% Poor share is the 4th-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1972 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 |
|---|---|---|---|---|---|
| Hettinger County | 64 | 34.4% | 50% | 15.6% | 1963 |
| Billings County | 60 | 61.7% | 35% | 3.3% | 1979 |
| Grant County | 60 | 45% | 45% | 10% | 1968 |
| LaMoure County (this page) | 60 | 48.3% | 40% | 11.7% | 1972 |
| Towner County | 58 | 34.5% | 39.7% | 25.9% | 1978 |
| McLean County | 57 | 40.4% | 54.4% | 5.3% | 1973 |
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 LaMoure 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 LaMoure County, both outside North Dakota so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside ND (60 bridges here).
- Hamilton County, FL · 60 bridges
- Hernando County, FL · 60 bridges
- Madison County, FL · 60 bridges
- Heard County, GA · 60 bridges
Similar average build year
Nearest mean year-built outside ND (1972 here).
- Santa Clara County, CA · avg 1972 · 964 bridges
- Madison County, AL · avg 1972 · 710 bridges
- Kern County, CA · avg 1972 · 668 bridges
- York County, PA · avg 1972 · 569 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (60)
US HIGHWAY 281
GoodOver: COTTONWOOD CREEK
7 NORTH OF ND 13, LaMoure, ND
Built 2006 Load: 59.4 t ADT: 1,625
US HIGHWAY 281
GoodOver: MAPLE CREEK
3 NORTH OF ND 13, LaMoure, ND
Built 2006 Load: 69.6 t ADT: 1,625
US HIGHWAY 281
GoodOver: COTTONWOOD CREEK
9 NORTH OF ND 13, LaMoure, ND
Built 2006 Load: 83.5 t ADT: 1,625
COUNTY ROAD
PoorOver: MAPLE CREEK
1 NORTH 2 EAST OF EDGELEY, LaMoure, ND
Built 1920 Load: 0.0 t ADT: 10
COUNTY ROAD
PoorOver: JAMES RIVER
NORTH OF LAMOURE, LaMoure, ND
Built 1910 Load: 1.1 t ADT: 50
COUNTY HIGHWAY
PoorOver: JAMES RIVER
1 SOUTHWEST OF ADRIAN, LaMoure, ND
Built 1908 Load: 6.0 t ADT: 18
COUNTY ROAD
PoorOver: MAPLE RIVER
2 SOUTH 1 EAST OF EDGELEY, LaMoure, ND
Built 1935 Load: 18.1 t ADT: 24
COUNTY ROAD
PoorOver: COTTONWOOD CREEK
2 SOUTH 1 EAST OF JUD, LaMoure, ND
Built 1950 Load: 19.5 t ADT: 2
COUNTY HIGHWAY
PoorOver: JAMES RIVER
3 WEST 3 NORTH OF DICKEY, LaMoure, ND
Built 1950 Load: 20.6 t ADT: 140
COUNTY HIGHWAY
PoorOver: BONE HILL CREEK
5 WEST OF DICKEY, LaMoure, ND
Built 1977 Load: 34.3 t ADT: 70
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.