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Duluth, MN · St. Louis County

Water Risk Profile — ZIP 55806

Flood risk, local cost data, climate factors, and insurance context for your ZIP code.

Flood Risk

Medium

Cost Range

$1,500–$8,500

Avg Response

42 min

NFIP

State participates

Local Climate & Risk Factors

Duluth, Minnesota experiences among the most severe pipe freeze risk in the continental U.S. — the Twin Cities recorded -60°F wind chill during the 2019 polar vortex, and annual temperatures regularly reach -30°F in northern Minnesota. Pipes in exterior walls, attic runs, and crawl spaces freeze and burst in every significant cold event. Minnesota also faces significant spring flooding from snowmelt — the Red River of the North (which drains northward into Canada) floods in most years. Minnesota Insurance Statute 60A.0811 requires insurers to acknowledge claims within 10 working days and pay or deny within 60 days. A battery backup sump pump is essential for any Minnesota home with a basement.

Flood-prone areas: Lincoln Park and the adjacent West Duluth neighborhoods near the Miller Creek and St. Louis River confluence are at the highest combined risk in the city: flat terrain near the river holds floodwater longer, and the creek corridor through Lincoln Park is prone to rapid rises that overwhelm culverts with little warning. The Congdon Park neighborhood on the eastern hillside sustained some of the most severe structural flood damage in the 2012 disaster because hillside topography accelerates water velocity directly into residential properties.

Insurance tip: Minnesota homeowners in Duluth should purchase a separate sewer backup endorsement in addition to NFIP flood coverage, because the June 2012 event demonstrated that storm sewer surcharge — rather than direct river flooding — was the mechanism that damaged the largest number of insured properties, and NFIP policies explicitly exclude sewer backup losses.

Water Category Cost Table — Duluth, MN

Extraction & drying cost per square foot by IICRC water category

Water Category$/sq ft
Category 1 — Clean

Burst supply line, clean appliance overflow

$2.72–$6.74
Category 2 — Gray

Dishwasher, washing machine, toilet bowl (no feces)

$6.74–$8.16
Category 3 — Black

Sewage backup, floodwater, toilet overflow with feces

$9.59–$12.1

Estimates exclude reconstruction (drywall, flooring replacement). National benchmarks: Cat 1 $3.75–$4.25, Cat 2 $4.10–$6.50, Cat 3 $7–$7.50/sq ft — adjusted for Duluth market (3.211/sq ft range).

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