Blog · October 14, 2026 · Colorado
Reading the Milliken Flood Zone Map for a parcel
Flood zones are set by FEMA, and checking one near Johnstown takes a few minutes.
Main page: Weld County, CO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Looking at a lot near Johnstown? A quick look at the Milliken flood zone map shows whether the lot falls inside a mapped floodplain, and no account is needed. Covered here for Milliken: the free FEMA tools, what each zone label means, when insurance is required and how to challenge a map that looks wrong.
The Milliken flood zone map: start here
Flood zones come from FEMA's Flood Map Service Center: search an address around Gilcrest, and pick the FIRMette or map view. Vacant ground around Evans can still be found: search the nearest road and click the spot.
Pulling up a parcel
Go first to the Weld County parcel viewer; it includes each tax parcel from Johnstown to Evans. For a parcel near Berthoud, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. If the land is near Evans, write down the parcel ID before closing the panel; each clerk in the county uses it to find the file.
Milliken and the county around it
Milliken is part of Weld County, Colorado, and the county assessor maps its lots. For a parcel near Greeley, the municipality handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Land beyond the town limits near Platteville usually follows county rules, not municipal ones.
What the zone letters mean
For acreage around Platteville, zones beginning with A or V mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. For acreage around Evans, a shaded X area is moderate risk, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Sections, lots and bearings
Colorado uses the Public Land Survey System, so deeds around Gilcrest reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though sections near Evans can be irregular. Keep the legal description for land near Evans before you request a deed or survey.
Parcel lines plus flood zones
When the zone clips a corner of a lot near Greeley, the structure's footprint is the key question.
Who handles what
Questions about value or the owner field for land near Greeley are handled by the County Assessor, the office behind the parcel record. Building or septic questions for a lot near Evans are for the local planning and health departments, town or county, depending on location.
Using it on a phone
Most viewers work in a phone browser, handy when you're parked on a road near Greeley, but coverage can be spotty out of town. A screenshot of the parcel near Platteville with its ID keeps working without signal.
When a parcel crosses a boundary
Weld County borders Adams County, Boulder County, Broomfield County, Larimer County, and Logan County, and each of those keeps its own parcel map. Ground near Berthoud that runs to the line can be split across two assessors' files, so check the adjacent map too. If the land is near Evans, our state page lists every neighboring county map across Colorado.
Backing up the map with records
The map is an index, not the title: deeds, plats and easements covering ground around Berthoud sit with the County Clerk and Recorder. Older tracts near Berthoud may go back through several deeds, so a title company can sort it out on a real sale.
Insurance, lenders and building
For land near Evans, an Elevation Certificate from a surveyor helps: it compares the building to the BFE. New construction in a floodplain near Evans often needs a floodplain permit; call the permitting office early.
Weld County in a few facts
Greeley serves as the county seat, where most land records are kept. Other places on the map include Johnstown, Gilcrest, Berthoud, and Platteville. Around 359,442 people live in Weld County (Census Bureau estimate, 2023) spread over about 3,985 square miles. Weld County dates to 1861, and some chains of title near Platteville are long. Places such as Pawnee National Grassland are easy to spot when you zoom out from Berthoud.
Beyond the mapped zones
Low-lying fields near Johnstown may not have detailed mapping, so walk the land after rain. Marshy spots near Gilcrest can limit building too; check the National Wetlands Inventory mapper for a first look.
A short flood checklist
Request for any Elevation Certificate for the house near Greeley; getting a quote early keeps the budget honest.
Questions about the Milliken flood zone map
How often are flood maps updated around Berthoud?
It depends, but zones near Greeley can shift when FEMA updates a panel; your community is notified before changes take effect.
What does Zone AE mean near Gilcrest?
AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Johnstown design to that elevation.
Is Zone X safe from flooding around Evans?
Short answer: X zones around Evans are lower risk, not no risk, and floods still happen outside high-risk zones.
When is flood insurance required for land near Greeley?
For most people, lenders generally require it for buildings near Platteville in a Special Flood Hazard Area when the loan is federally regulated or insured; outside those zones it's your call.
How do I save a parcel from the viewer in Milliken?
Most viewers have a print or export tool, and it's worth keeping the parcel ID visible for land near Johnstown.
Open the official Weld County, CO 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.