Flood Zones and Flood Control in Chaves County, New Mexico

Three layers: FEMA flood zones, the county ordinance, and the Flood Commission itself

A Chaves County parcel's flood exposure runs through three distinct layers. FEMA's national flood-zone system (covered in our national flood-zones guide) sets baseline insurance and elevation requirements everywhere. The county's own Flood Damage Prevention Ordinance is the zoning-level layer described on the county hub -- it ties building and floodproofing requirements to FEMA's mapped flood-hazard areas along the Pecos and Hondo River drainages near Roswell. But Chaves County also has something most New Mexico counties don't: an actual flood-control special district, the Chaves County Flood Commission, that owns, operates, and maintains physical flood infrastructure -- levees, channels, and drainage improvements -- independent of both the FEMA map and the zoning ordinance. A parcel can clear the zoning ordinance's requirements and still depend on this infrastructure functioning correctly to actually stay dry.

The Flood Commission: a real special district with a long history

The Chaves County Flood Commission was created by the Chaves County Commission in 1971, consolidating the Rio Hondo-Roswell Flood Control District (originally formed in 1947, after repeated flooding from the Rio Hondo and Berrendo Creek drainages through Roswell) with the separate Rio Felix Flood Control District. Its stated mission is to improve drainage ways and maintain flood-control infrastructure so that floodwater passes through the county to the Pecos River without damaging property -- a mission grounded in real, documented flood history: an October 1954 storm produced a peak discharge of roughly 19,400 cubic feet per second on South Berrendo Creek near Roswell, an event with an estimated 40-year recurrence interval, and Roswell has experienced other serious flood events since.

This infrastructure is not maintenance-free or risk-free just because it exists. In 2025, the New Mexico State Land Office granted the Flood Commission an emergency right-of-entry permit to repair a breach in a levee sitting on state trust land near Roswell -- a breach that had already caused flooding into streets and affected homes and businesses in the city. For a buyer, the practical lesson is that a parcel's real flood risk in Chaves County depends partly on infrastructure condition and maintenance funding that a private landowner has no control over, not solely on the parcel's own elevation or its FEMA flood-zone letter.

What to check before buying near the Hondo, Berrendo, Felix, or Pecos drainages

1. Pull the current FEMA Flood Insurance Rate Map designation for the specific parcel -- don't assume rural land is automatically outside a mapped flood-hazard area.
2. Confirm with the county Planning & Zoning Department whether the parcel falls within a zone the Flood Damage Prevention Ordinance regulates, and what building-elevation or floodproofing requirements would apply to new construction.
3. Ask the Chaves County Flood Commission directly whether the parcel is protected by, adjacent to, or downstream of Commission-maintained levee or channel infrastructure, and request any available maintenance or inspection history for that stretch.
4. For land near Roswell specifically, factor in the documented history of levee and drainage-infrastructure problems (including the 2025 breach) rather than assuming existing flood-control structures are permanently reliable.
5. If the parcel is agricultural or irrigated land tied into a drainage or acequia-style system in the Hondo or Berrendo valley, confirm who is legally responsible for that specific channel's maintenance -- it may be the Flood Commission, a separate irrigation or conservancy district, or the individual landowner.