Delta Range

Delta Range was originally being addressed by the Army National Guard Directorate (ARNG) under the Military Munitions Response Program (MMRP). In 2020, the Department of Defense indicated the site was not eligible under the MMRP and future work will be conducted by the Army National Guard under its Non-Department of Defense Owned Non-Operational Defense Site program, a nationwide program designed to identify former training areas where the Guard used munitions in training exercises. We and the Army National Guard have developed a plan for cleanup and providing public education to protect users. This work is ongoing.

The three “R’s” of munitions safety

Munitions safety brochure

Recognize

  • Recognizing when you may have encountered a munition is key to reducing the risk of injury or death.
  • If you encounter or suspect you’ve encountered a munition, consider it extremely dangerous.
  • Munitions are sometimes hard to see and identify. They may resemble:
    • A pointed pipe.
    • A soda can.
    • A baseball.
    • A muffler.
    • Other metal objects.
  • They may be:
    • Visible on the surface.
    • Buried.
    • Exposed by erosion or fires.
  • They may look new or old, be complete or in parts, be found alone or in groups.
  • Any suspect items should be considered dangerous, regardless of size or apparent age.

Retreat

  • If you encounter or suspect you’ve encountered a munition, don’t touch, move or disturb it.
  • Immediately and carefully leave the area, following the same path on which you entered.
  • If you can, mark the general area — not the munition — in some manner (e.g., with a hat, piece of cloth, or tying a piece of plastic to a bush or tree branch).

Report

  • Call 911 immediately.
  • Notify local law enforcement of what you saw and where you saw it.
  • If you or someone you know may have collected munitions-related items as souvenirs, please notify law enforcement immediately so trained professionals can remove the items safely.

Background

Delta Range Munitions Response Area (MRA) is a 14,513-acre site located in Delta County, Colorado. The Delta Range is federally owned and under the jurisdiction of the BLM. The range was used by the Colorado Army National Guard between 1957 and 1991. The U.S. Army Reserve used the range between 1976 and 1983. Delta Range MRA is located on public lands managed by the BLM Uncompahgre Basin Resource Area. The land is not fenced and has unrestricted access, although signs along access roads warn visitors of the danger of potential UXO. The lands are currently used for recreation, oil and gas exploration, mineral extraction, and livestock grazing. The land is undeveloped, with dirt roads providing access to the utility right of way and oil and gas production sites to the north.

Delta Range Complex areas for cleanup

Delta Range MRS map

  • The Delta Range 3.5-Inch Practice Rocket Range MRS encompasses 141 acres located in the western part of Delta Range MRA used for 3.5-inch practice rocket training. The Selected Remedy for Delta Range 3.5-Inch Practice Rocket Range MRS consists of a technology-aided (using magnetometers) surface removal of DoD military munitions and implementation of Institutional Controls (ICs) with Five-Year Reviews.
  • Delta Range Army Reserve Camp Mortar Area MRS is 67 acres within the 14,513-acre Delta Range MRA. The United States Army Reserve (USAR) used the Delta Range Army Reserve Camp Mortar Area MRS for training. The USAR camp was located in the drainage basin west of Wells Gulch Road.  The Selected Remedy for Delta Range Army Reserve Camp Mortar Area MRS consists of 100 percent digital geophysical mapping (DGM) and surface and subsurface removal to full depth (expected to be 18 inches), and implementation of Institutional Controls (ICs) with Five-Year Reviews.
  • Delta Range Practice Grenade Areas MRS encompasses 48.85 acres within the 14,513-acre Delta Range MRA. The Selected Remedy for the Delta Range Practice Grenade Areas MRS consists of 100 percent digital geophysical mapping (DGM) and surface and subsurface removal to full depth (expected to be 18 inches) of DoD military munitions, and implement Institutional Controls (ICs) with Five-Year Reviews.
  • Delta Range Southeast Debris Area MRS encompasses 26.2 acres within the 14,513-acre Delta Range MRA. The Selected Remedy for Delta Range Southeast Debris Area MRS consists of Advanced Institutional Controls (ICs) with Five-Year Reviews.
  • Delta Range Impact Areas MRS encompasses 1,993 acres within the 14,513-acre Delta Range MRA. The Selected Remedy for Delta Range Impact Areas MRS consists of 100 percent digital geophysical mapping (DGM) and surface and subsurface removal to full depth (expected to be 18 inches) with the aid of advanced classification technology (ACT), and Institutional Controls (ICs) with Five-Year Reviews.
  • Delta Range Remainder MRS encompasses 12,237 acres within the 14,513-acre Delta Range MRA. The Selected Remedy for Delta Range (Remainder) MRS consists of the implementation of Advanced Institutional Controls (ICs).

Record of Decisions for Delta Range Complexes

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