County profile · official public datasets

Anoka County, MN

151 public highway bridges tracked in the FHWA National Bridge Inventory: 55% rated Good, 40.4% Fair, 4.6% Poor.

151
Public bridges: 55%
Good condition: 4.6%
Poor condition

The verdict

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

Anoka County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

51st
of 87 on Poor share: 4.6%
Poor-condition share: 151
public highway bridges: 1990
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.

Anoka County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Anoka County ranks #51 of 87 Minnesota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.6%). Anoka County, Minnesota contains 151 public highway bridges. Roughly 55% are rated “Good,” 40.4% “Fair,” and 4.6% “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 Anoka County

Good condition

55%

83 of 151 rated 7-9

Fair condition

40.4%

61 of 151 rated 5-6

Poor condition

4.6%

7 of 151 rated 4 or below

In-state Poor-share rank

#51 of 87

Among Minnesota counties with 5+ bridges, lower share ranks better

Condition distribution

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

Good

55% (83)

Fair

40.4% (61)

Poor

4.6% (7)

Anoka County's Poor-condition bridges carry 52,542 vehicle crossings a day

That is 1.7% of the county's reported daily bridge traffic on 4.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 7,506 crossings a day against 14,220 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.

23.2% of Anoka County's bridges have passed the 50-year mark

35 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 55% 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 36.3% of the county's Poor-condition bridge traffic

MN 65 over COON CREEK, built 1958, carries 19,067 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 52,542 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

2
1940s

1
1950s

4
1960s

24
1970s

8
1980s

26
1990s

36
2000s

27
2010s

14
2020s

9

What this shows Construction peaked in the 1990s, when 36 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1990) matches the Minnesota average (1986).

How Anoka County compares with Minnesota's closest counties by inventory size

The 5 Minnesota counties nearest Anoka County in number of bridges, with their condition splits. Its 4.6% Poor share is the 4th-lowest of these 6. Its average build year of 1990 against a peer-group mean of 1983 is 7 years newer.

Showing the 5 closest of 86 Minnesota counties eligible for comparison.

Bridge inventory size and condition shares for Anoka County and the 5 Minnesota counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Cottonwood County	151	74.8%	23.8%	1.3%	1981
Anoka County (this page)	151	55%	40.4%	4.6%	1990
Norman County	149	75.2%	21.5%	3.4%	1983
Otter Tail County	149	40.9%	52.3%	6.7%	1980
Carlton County	147	51.7%	39.5%	8.8%	1986
Wabasha County	147	60.5%	39.5%	0%	1985

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 Anoka 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 Anoka County, both outside Minnesota so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MN (151 bridges here).

Randolph County, AR · 151 bridges
Pasco County, FL · 151 bridges
St. Lucie County, FL · 151 bridges
Hall County, GA · 151 bridges

Similar average build year

Nearest mean year-built outside MN (1990 here).

Maricopa County, AZ · avg 1990 · 2,847 bridges
Tarrant County, TX · avg 1990 · 2,617 bridges
Fairfax County, VA · avg 1990 · 751 bridges
Guilford County, NC · avg 1990 · 736 bridges

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

All 151 Good 83 Fair 61 Poor 7

Good-condition bridges (83)

Sort:

Anoka County Bridge Snapshot

Condition distribution

Anoka County's Poor-condition bridges carry 52,542 vehicle crossings a day

23.2% of Anoka County's bridges have passed the 50-year mark

One structure carries 36.3% of the county's Poor-condition bridge traffic

How Anoka County compares with Minnesota's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (83)

MSAS 108

MSAS 101

CSAH 14

CR 52

CSAH 116

MSAS 104

MN 47

CSAH 1

CSAH 9

CSAH 14

CSAH 49

MSAS 104

MSAS 124

CSAH 13

MSAS 114

MSAS 146

MSAS 143

M 978

M 1053

M 609

CR 18

CSAH 116

MSAS 141

MSAS 112

CSAH 11

MSAS 120

MSAS 121

CSAH 31

CSAH 14

CSAH 54

MSAS 125

CSAH 22

CSAH 85

CSAH 85

CR 74

CSAH 14

CSAH 14

US 10

US 10

CSAH 30

US 10

CON 4866

CSAH 14

US 169

M 22

CSAH 24

US 10

US 10

CR 18

CR 140

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