County profile · official public datasets

Burleigh County, ND

113 public highway bridges tracked in the FHWA National Bridge Inventory: 50.4% rated Good, 47.8% Fair, 1.8% Poor.

113
Public bridges
50.4%
Good condition
1.8%
Poor condition

The verdict

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

Burleigh County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 13%
lowest Poor share in state
1.8%
Poor-condition share
113
public highway bridges
1979
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.

Burleigh County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Burleigh County ranks #7 of 53 North Dakota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.8%). Burleigh County, North Dakota contains 113 public highway bridges. Roughly 50.4% are rated “Good,” 47.8% “Fair,” and 1.8% “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

113

Public highway bridges in Burleigh County

Good condition

50.4%

57 of 113 rated 7-9

Fair condition

47.8%

54 of 113 rated 5-6

Poor condition

1.8%

2 of 113 rated 4 or below

In-state Poor-share rank

#7 of 53

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

Condition distribution

Share of 113 NBI-tracked bridges by lowest applicable component rating.

Good
50.4% (57)
Fair
47.8% (54)
Poor
1.8% (2)

Burleigh County's Poor-condition bridges carry 60 vehicle crossings a day

That is 0% of the county's reported daily bridge traffic on 1.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 30 crossings a day against 1,784 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 113 of 113 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

45.1% of Burleigh County's bridges have passed the 50-year mark

51 of the 113 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 50.4% 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 50% of the county's Poor-condition bridge traffic

409th Ave NE over CREEK, built 1958, carries 30 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 2-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 60 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Burleigh County's bridges were built

113 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 36 of the county's bridges still in the inventory were built, which is 31.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1979) matches the North Dakota average (1975).

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

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

The 5 North Dakota counties nearest Burleigh County in number of bridges, with their condition splits. Its 1.8% Poor share is the 1st-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1976 is in line with the group.

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

Bridge inventory size and condition shares for Burleigh County and the 5 North Dakota counties closest to it in inventory size
County Bridges Poor
McKenzie County 129 2.3%
Bottineau County 124 17.7%
Ward County 123 7.3%
Burleigh County (this page) 113 1.8%
McHenry County 112 27.7%
Williams County 100 23%

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

Similar inventory size

Nearest county inventories outside ND (113 bridges here).

Similar average build year

Nearest mean year-built outside ND (1979 here).

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

All 113 Good 57 Fair 54 Poor 2

All bridges (113)

370th Ave NE

Good

Over: CREEK

4 EAST 4 NORTH OF WILTON, Burleigh, ND

Built 1999 Load: 45.0 t ADT: 50

I-94 BUS LP BISMAR

Good

Over: WASHINGTON STREET

WEST MAIN & WASHINGTON ST, Burleigh, ND

Built 1993 Load: 45.0 t ADT: 6,600

BISMARCK EXPWY

Good

Over: HAY CREEK

2 SOUTH OF EXIT 161, Burleigh, ND

Built 1984 Load: 45.2 t ADT: 6,900

41ST ST NE

Good

Over: BURNT CREEK

2 EAST 8 NORTH BISMARCK, Burleigh, ND

Built 1979 Load: 48.8 t ADT: 35

Co Rd 10

Good

Over: APPLE CREEK

2 WEST OF MENOKEN, Burleigh, ND

Built 1969 Load: 49.7 t ADT: 745

INTERSTATE 94

Good

Over: APPLE CREEK

9 EAST OF US 83 NORTH, Burleigh, ND

Built 1965 Load: 50.8 t ADT: 3,850

INTERSTATE 94

Good

Over: APPLE CREEK

9 EAST OF US 83 NORTH, Burleigh, ND

Built 1965 Load: 50.8 t ADT: 3,850

MISTY WATERS ROAD

Good

Over: MISTY WATERS BAY

MISTY WATERS, Burleigh, ND

Built 2006 Load: 51.9 t ADT: 50

BISMARCK EXPWY.

Good

Over: BN & CP RAILWAY

2 S 1 W OF I-94 EXIT 161, Burleigh, ND

Built 1985 Load: 59.6 t ADT: 8,000

26th St NE

Good

Over: BURNT CREEK

1 NORTH OF BALDWIN, Burleigh, ND

Built 2021 Load: 60.4 t ADT: 35

249th ST NE

Good

Over: APPLE CREEK

1 EAST 6 NORTH MCKENZIE, Burleigh, ND

Built 2008 Load: 71.5 t ADT: 60

409th Ave NE

Poor

Over: CREEK

7 EAST 7 NORTH OF WILTON, Burleigh, ND

Built 1958 Load: 29.1 t ADT: 30

COUNTY HIGHWAY

Poor

Over: LONG LAKE

1 NORTH OF MOFFIT, Burleigh, ND

Built 1955 Load: 77.7 t ADT: 30

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

Related

Browse all → | Rankings →
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.