FEMA flood zones · Idaho

Lincoln County, Idaho Flood Zone Map

5 flood insurance claims·$35,511 paid·2 federal flood & hurricane disasters

FEMA’s digital flood map shows no high- or moderate-risk zones in Lincoln County. That can mean the area was never studied in detail or has no digital map, not that it can’t flood; the county floodplain administrator can say which.

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Lincoln County, Idaho. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 1 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 2012, with 2 claims and $5,606 paid.

1982: 1 claims1995: 1 claims1996: 1 claims2012: 2 claims1980199020002010

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

2 NOAA storm reports from Lincoln County describe what happened, in the words of the forecasters who covered it. Read the Idaho flood stories →

Federal disasters

7 federal disaster declarations since 1964, 2 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter Storms And FloodingFeb 5, 2017
Hurricane KatrinaAug 29, 2005
WildfiresJul 27, 2000
DroughtMay 5, 1977
Heavy Rains & FloodingDec 31, 1964

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

4 since 1996: 4 river or area floods.

EventDateDamage
FloodFeb 5, 2017$2.1M
FloodMar 1, 2017$277,000
FloodApr 1, 2017—
FloodJan 21, 2012$37,500

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flood · Feb 5, 2017. A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month. The brunt of the flooding occurred in Cassia, Minidoka, Jefferson, Lincoln and Bingham Counties but all counties did receive at least minor flooding. The floding began February 4th and continued to affect low lying areas until the end…

Flood · Mar 1, 2017. Lower elevation mountain snowpack continued to melt in March and widespread sheet flooding from the snow melt. Although the severity of the flooding diminished from the onset in January and February, the persistence and flood damage continued in most counties.

Flood · Apr 1, 2017. Some flooding continued throughout the month but not as severe as previous months or the future river flooding in May and June.

Flood · Jan 21, 2012. Several thousand dollars worth of damage due to flooding from extensive rainfall during the week. In Oneida County highways 36 and 38 damaged with mud and debris. Old Highway 191 near Malad Summit covered with mud and debris also. In Lincoln County two rural houses flooded along with several road washouts.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Lincoln County

If a building in Lincoln County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.