County profile · official public datasets

Traill County, ND

151 public highway bridges tracked in the FHWA National Bridge Inventory: 31.1% rated Good, 51% Fair, 17.9% Poor.

151
Public bridges
31.1%
Good condition
17.9%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Traill County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

46th
of 53 on Poor share
17.9%
Poor-condition share
151
public highway bridges
1970
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.

Traill County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Traill County ranks #46 of 53 North Dakota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 17.9%). Traill County, North Dakota contains 151 public highway bridges. Roughly 31.1% are rated “Good,” 51% “Fair,” and 17.9% “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.

Total bridges

151

Public highway bridges in Traill County

Good condition

31.1%

47 of 151 rated 7-9

Fair condition

51%

77 of 151 rated 5-6

Poor condition

17.9%

27 of 151 rated 4 or below

In-state Poor-share rank

#46 of 53

Among North Dakota counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 151 NBI-tracked bridges by lowest applicable component rating.

Good
31.1% (47)
Fair
51% (77)
Poor
17.9% (27)

Traill County's Poor-condition bridges carry 5,519 vehicle crossings a day

That is 5.6% of the county's reported daily bridge traffic on 17.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 204 crossings a day against 1,033 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 151 of 151 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

59.6% of Traill County's bridges have passed the 50-year mark

90 of the 151 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 31.1% 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 36.4% of the county's Poor-condition bridge traffic

ND HIGHWAY 200 over GOOSE RIVER, built 1977, carries 2,010 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 27-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 5,519 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Traill County's bridges were built

151 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 33 of the county's bridges still in the inventory were built, which is 21.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1970, 5 years older than the North Dakota average of 1975.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Traill County compares with North Dakota's closest counties by inventory size

The 5 North Dakota counties nearest Traill County in number of bridges, with their condition splits. Its 17.9% Poor share is the 6th-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1981 is 11 years older.

Showing the 5 closest of 52 North Dakota counties eligible for comparison.

Bridge inventory size and condition shares for Traill County and the 5 North Dakota counties closest to it in inventory size
County Bridges Poor
Stark County 157 3.8%
Traill County (this page) 151 17.9%
McKenzie County 129 2.3%
Bottineau County 124 17.7%
Ward County 123 7.3%
Burleigh County 113 1.8%

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 Traill 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 Traill County, both outside North Dakota so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside ND (151 bridges here).

Similar average build year

Nearest mean year-built outside ND (1970 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 151 Good 47 Fair 77 Poor 27

Fair-condition bridges (77)

COUNTY HIGHWAY

Fair

Over: BUFFALO COULEE

1 EAST 2 SOUTH BUXTON, Traill, ND

Built 2016 Load: 31.3 t ADT: 80

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH ELM RIVER

1 EAST OF KELSO, Traill, ND

Built 1937 Load: 33.2 t ADT: 595

ND HIGHWAY 200

Fair

Over: RED RIVER OF THE NORTH

ND-MINNESOTA BORDER, Traill, ND

Built 1999 Load: 33.5 t ADT: 900

COUNTY HIGHWAY

Fair

Over: ELM RIVER

0.5 SOUTH OF BLANCHARD, Traill, ND

Built 1937 Load: 35.7 t ADT: 20

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH ELM RIVER

3 EAST 7 SOUTH HILLSBORO, Traill, ND

Built 1979 Load: 35.9 t ADT: 20

INTERSTATE 29

Fair

Over: SOUTH BRANCH ELM RIVER

1 NORTH OF GRANDIN, Traill, ND

Built 1970 Load: 36.0 t ADT: 4,350

INTERSTATE 29

Fair

Over: SOUTH BRANCH ELM RIVER

1 NORTH OF GRANDIN, Traill, ND

Built 1970 Load: 36.0 t ADT: 4,350

COUNTY HIGHWAY

Fair

Over: I-29/CUMMINGS SEPARATION

1 NORTH OF ND 200, Traill, ND

Built 1970 Load: 36.0 t ADT: 160

COUNTY HIGHWAY

Fair

Over: I-29/BUXTON INTERCHANGE

7 NORTH OF ND 200, Traill, ND

Built 1970 Load: 37.3 t ADT: 800

INTERSTATE 29

Fair

Over: GOOSE RIVER

4 NORTH OF 200 SOUTH, Traill, ND

Built 1970 Load: 38.4 t ADT: 4,550

INTERSTATE 29

Fair

Over: GOOSE RIVER

4 NORTH OF 200 SOUTH, Traill, ND

Built 1970 Load: 38.4 t ADT: 4,550

ND HIGHWAY 18

Fair

Over: GOOSE RIVER

CITY OF MAYVILLE, Traill, ND

Built 1966 Load: 40.4 t ADT: 4,800

ND HIGHWAY 200A

Fair

Over: I-29/BLANCHARD INT

JUNCTION OF 200A & I29, Traill, ND

Built 1971 Load: 40.5 t ADT: 830

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH ELM RIVER

3 WEST OF KELSO, Traill, ND

Built 2000 Load: 41.5 t ADT: 20

INTERSTATE 29

Fair

Over: BNSF SEPARATION

3 NORTH OF ND 200, Traill, ND

Built 1969 Load: 46.6 t ADT: 4,550

INTERSTATE 29

Fair

Over: BNSF SEPARATION

3 NORTH OF ND 200, Traill, ND

Built 1969 Load: 46.6 t ADT: 4,550

ND HIGHWAY 18

Fair

Over: SO. BRANCH GOOSE RIVER

2 WEST OF PORTLAND, Traill, ND

Built 1985 Load: 48.6 t ADT: 1,210

ND HIGHWAY 18

Fair

Over: GOOSE RIVER

7 SOUTH OF HATTON, Traill, ND

Built 1993 Load: 55.6 t ADT: 660

8TH ST SE

Fair

Over: ELM RIVER

2 EAST 2 NORTH GALESBURG, Traill, ND

Built 1963 Load: 62.7 t ADT: 30

COUNTY HIGHWAY

Fair

Over: ELM RIVER

4 WEST 2 NORTH OF GRANDIN, Traill, ND

Built 1978 Load: 78.7 t ADT: 110

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH GOOSE RIVER

3 EAST OF HATTON, Traill, ND

Built 1977 Load: 83.3 t ADT: 20

COUNTY ROAD

Fair

Over: DRAIN

9 E 1 N OF KELSO, Traill, ND

Built 1995 Load: 89.7 t ADT: 10

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH GOOSE RIVER

1 EAST 1 NORTH PORTLAND, Traill, ND

Built 1996 Load: 99.9 t ADT: 110

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH GOOSE RIVER

2 WEST 1 NORTH MAYVILLE, Traill, ND

Built 1998 Load: 99.9 t ADT: 50

COUNTY HIGHWAY

Fair

Over: N. MAYVILLE DRAIN NO. 8

4 EAST 3 NORTH MAYVILLE, Traill, ND

Built 1994 Load: 99.9 t ADT: 20

COUNTY HIGHWAY

Fair

Over: NORTH BRANCH GOOSE RIVER

5 EAST 1 NORTH MAYVILLE, Traill, ND

Built 1995 Load: 99.9 t ADT: 10

COUNTY HIGHWAY

Fair

Over: ELM RIVER

8 EAST 4 SOUTH OF KELSO, Traill, ND

Built 1982 Load: 99.9 t ADT: 85

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.