Low-Flying Helicopter: No Cause for Alarm! New Mexico Aquifer Mapping Mission Underway

Residents across several regions of New Mexico should be aware of low-flying helicopters over the next few weeks, as the New Mexico Bureau of Geology and Mineral Resources (NMBGMR) and New Mexico Tech kick off an essential, scheduled mission to map the state’s subsurface water resources. This is a scientific effort, and there is absolutely no reason for public concern or alarm.

The project involves contractors operating a helicopter equipped with specialized geophysical instruments. The goal is to create crucial three-dimensional maps of aquifer systems using a technique that measures the natural electromagnetic responses of underground materials like sand, gravel, and clay.

Flight Schedule and Areas of Operation

Starting from November 15, the flights will begin in the Truth or Consequences area and proceed south toward Las Cruces over the next 15 to 20 days. Simultaneously, a separate survey will commence near Silver City, heading toward Lordsburg and further south for a similar duration.

• Initial Focus: Truth or Consequences to Las Cruces (starting Nov. 15)
• Southwest Focus: Silver City toward Lordsburg (starting Nov. 15)
• Mid-November: Mimbres Basin near Deming (starting week of Nov. 17)
• Mid-December: San Acacia reach of the Rio Grande and the Estancia Basin

Flight dates are flexible and subject to change based on weather conditions.

What to Expect: Low and Slow, But Safe

The helicopter will be flying at an uncommonly low altitude—approximately 100 feet above the ground—to ensure the best data collection along pre-planned flight paths. This height is necessary for the instruments to accurately measure the faint electromagnetic signals from deep underground.

These are NOT emergency maneuvers or surveillance flights. The aircraft are part of a long-term research effort vital to New Mexico’s water security. The instruments are completely passive, posing no risk to humans, animals, or plant life, and the professional pilots are specially trained and approved for this type of low-level flying, operating in accordance with all Federal Aviation Administration (FAA) regulations.

The data gathered will be combined with existing well and geological information to provide scientists and water managers with a much clearer picture of the state’s groundwater reserves, which are critical for sustainable resource management.

You can learn more about the technique used in this mission by watching this video: What are airborne electromagnetic surveys?. This video explains how airborne electromagnetic surveys, like the one being conducted in New Mexico, are used to locate potential groundwater sources and map subsurface geology.