Blog · October 14, 2026 · Alaska
Petersburg Borough Flood Zone Map: checking a property's flood zone
Flood zones are set by FEMA, and checking one near Kupreanof takes a few minutes.
Main page: Petersburg Borough, AK GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near Kupreanof, check the Petersburg Borough flood zone map: a mapped flood zone changes insurance, building rules and resale. What this Petersburg Borough guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the Alaska Statewide Parcels layer in ArcGIS Map Viewer.
Checking the Petersburg Borough flood zone map step by step
For parcel-by-parcel detail, use the National Flood Hazard Layer viewer, which lets you click a spot and read its zone, whether the land is near Hobart Bay or elsewhere in the borough. Rural land near Hobart Bay with no street number can still be found: zoom in from the nearest road then click the parcel area.
Getting to the right map
Begin with the Alaska Statewide Parcels layer in ArcGIS Map Viewer; it maps each tax parcel from Kupreanof to Hobart Bay. Without an address in hand, follow the nearest road on the aerial until the lines appear, then click inside the one you want, whether the land is near Hobart Bay or elsewhere in the borough. For land near Hobart Bay, the parcel card typically gives the owner of record, assessed acreage, the parcel number and often a sale date.
What the zone letters mean
For acreage around Hobart Bay, any A or V zone mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. If the land is near Hobart Bay, shaded Zone X is moderate risk, roughly the 100- to 500-year range; plain X, or C on older maps, is minimal risk.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so open the Alaska Statewide Parcels layer in ArcGIS Map Viewer next to see exactly which lot near Kupreanof you're looking at.
On site with the map
Most viewers work in a phone browser, useful out on a road near Kupreanof, though signal can drop in rural spots. A saved image of the lot near Hobart Bay and its lines is a good backup.
What the map can't tell you
For a parcel near Kupreanof, listed acreage is a tax-roll number; just a licensed surveyor sets the real lines on the ground. Owner names and values update on a schedule, so a recent sale near Hobart Bay may not show yet.
Getting your bearings
Petersburg holds the county offices, home to the main records offices. You'll also find Kupreanof and Hobart Bay. About 3,427 people call Petersburg Borough home (Census Bureau estimate, 2023) spread over some 2,901 square miles. Petersburg Borough dates to 2013, and some chains of title near Kupreanof are long.
Water near Kupreanof
Creeks and ditches near Hobart Bay may not have detailed mapping, so look for water marks and debris lines. Marshy spots near Hobart Bay can limit building too; check the National Wetlands Inventory mapper for a first look.
Where the recorded documents are
The map is an index, not the title: deeds, plats and easements for land near Kupreanof sit with the State Recorder's Office (Alaska DNR). For land near Hobart Bay, bring the book and page shown in the record panel to skip a name search.
A short flood checklist
If the land is near Hobart Bay, ask the seller about past flood claims before closing; getting a quote early keeps the budget honest.
Sections, lots and bearings
Alaska follows the Public Land Survey System, which means a tract near Hobart Bay is described by section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though corrections make some sections near Hobart Bay odd-sized. Copy the legal description from the record for the parcel near Kupreanof before you request a deed or survey.
Which office to call
Recorded documents for a parcel near Hobart Bay sit in the index kept by the State Recorder's Office (Alaska DNR), sometimes only in person. Questions about what you can build around Hobart Bay are for the local planning and health departments, town or borough, depending on location.
Lenders and permits
For a structure inside an A or V zone and a federally regulated lender is involved, mandatory purchase rules apply where the community participates in the National Flood Insurance Program, and that holds around Hobart Bay too. New construction in a floodplain near Kupreanof usually means extra permit review; check with the borough or town building office before you plan.
Petersburg Borough: common questions
Is Zone X safe from flooding near Hobart Bay?
For most people, X zones around Hobart Bay are lower risk, not no risk, and floods still happen outside high-risk zones.
Where can I see the Petersburg Borough flood zone map for free?
For most people, FEMA's free map shows the zone for any spot near Hobart Bay; then confirm the parcel on the county viewer.
How often are flood maps updated around Kupreanof?
For land near Hobart Bay, FEMA revises flood maps panel by panel as new studies finish; your community is notified before changes take effect.
What is a base flood elevation in Petersburg Borough?
Good question; a BFE near Kupreanof tells builders how high the lowest floor should be; surveyors near Hobart Bay use it often.
Can I settle a boundary dispute with the map near Hobart Bay?
For property near Kupreanof, parcel lines are tax drawings, not surveys; a survey sets the real corners
Open the official Petersburg Borough, AK parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.