2021: The remedial investigation/feasibility study (RI/FS), Proposed Plan, and Record of Decision (ROD) were finalized. The ROD specified remedy consists of No Further Action for 25.59 acres of developed area, while the remaining 8.14 acres of private, undeveloped land are subject to Land Use Controls (LUCs). These LUCs rely exclusively on educational measures, such as public notices, fact sheets, brochures, and warning signs.

2019 – 2020: The Arizona Army National Guard (ARNG) completed field work for the RI in May 2019 and submitted the draft RI for ADEQ review in December 2019. In January 2020, the ARNG submitted a notice to conduct supplemental field work for the RI. An agreement was made between ADEQ and ARNG to submit a new RI with the FS. The draft RI/FS was submitted for ADEQ review in August 2020 and approved.

2017 – 2019: Field work for the RI was conducted in three mobilizations beginning in October 2017 and concluding in May 2019. The RI field work involved surface soil sampling, Digital Geophysical Mapping and analog survey of the former backstop area. No RI activities were designed to take place within the developed areas, resulting in an area of investigation of 8.14 acres. The mapping and surveying activities obtained 91% coverage of the acreage investigated.

2011 – 2012: Site Inspection (SI) field work was completed in December 2011, and involved 3.6 miles of visual survey paths using metal detectors and the collection of surface soil samples. The SI was approved by ADEQ in 2012.

2008: The site is identified as a Non-Department of Defense, Non-Operational Defense Site and Munitions Response Site.

1968: ARNG relinquished the property to a private owner and residential development of the former firing range began.

1951: ARNG weapons training included small arms (.22-caliber, .30-caliber and .45-caliber) and submachine gun practice. The firing line was located along Eastern Street, with firing from west to east into targets with a natural bedrock escarpment backstop located 1,500 feet away.