FEMA flood zones · Colorado

Rio Grande County, Colorado Flood Zone Map

11 flood insurance claims·$14,318 paid·3 federal flood & hurricane disasters

4% of Rio Grande County’s area is in FEMA’s high-risk flood zones.

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 Rio Grande County, Colorado. 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 2019, with 3 claims and $10,287 paid.

1980: 3 claims1981: 1 claims1982: 1 claims1985: 1 claims2002: 1 claims2007: 1 claims2019: 3 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.

Federal disasters

9 federal disaster declarations since 1970, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
West Fork Fire ComplexJun 21, 2013
Hurricane Katrina EvacuationAug 29, 2005
Million FireJun 19, 2002
WildfiresApr 23, 2002
DroughtJan 29, 1977
Flooding & LandslidesJul 6, 1973
Heavy Rains & FloodingSep 22, 1970

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

Recorded flood events

5 since 1996: 2 flash floods and 3 river or area floods.

EventDateDamage
Flash FloodAug 25, 2003—
Flash FloodAug 23, 2003—
FloodApr 30, 1999$25,000
FloodMay 1, 1999—

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

From the storm reports

Flood · Apr 30, 1999. Rainfall amounts of 6 to 13 inches from Wednesday night to Friday night caused fast rushing water and major flooding from the Fountain Creek watershed to the Arkansas River east of Pueblo. Heavy rain in the mountains and adjacent plains upstream from Pueblo on the Arkansas River caused flooding in Custer, Fremont and Pueblo counties as well. In Pueblo county, damage was done to roads, irrigation systems and bri…

Flood · May 1, 1999. The most significant river flooding along the Arkansas River since at least 1965 was caused by widespread and persistent rainfall...especially along the eastern slopes of the southeast mountains. The heaviest rainfall occurred from late in the day on the 28th of April and persisted into the afternoon hours of April 30th. Widespread rainfall totals in excess of 8 inches was noted in 40 hours with some locations r…

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 Rio Grande County

If a building in Rio Grande 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.