Formerly Used Defense Sites

Formerly Used Defense Sites: Page 2 of 2

The Fort Huachuca Final RI/FS report for the Munition Response Sites (MRS) was issued in December 2015.  The Proposed Plan subdivided MRS 02 into 3 new sites (MRS02, MRS03, and MRS04); a public meeting was held in July 2016 with several participants inquiring about the recreational areas of the MRSs along the San Pedro River.  ADEQ received the Final Decision Documents which were dated September 2016.  The USACE chose Institutional Controls ICs to Protect Current and Future Site Users, for MRS 01 (Charleston Maneuver Area) and 02 (Artillery/Mortar Range, Range Safety Buffer Area).  MRS 03 (Artillery/Mortar Range, Potential Target Area A) was determined to require additional investigation and field work, the USACE choose Digital geophysical mapping and Surface / Subsurface Removal of Munitions of Explosive Concern (MEC) to a depth of 2 feet below ground surface with ICs as the remedial action.  MRS 04 (Artillery/Mortar Range, Potential Target Area B), was selected to also be investigated further with MEC Removal from the Surface with ICs to Protect Current and Future Site Users chosen as the remedy. 

ADEQ approved the Sahuarita Air Force Range Quality Assurance Project Plan (QAPP) work plan on June 14, 2017. Technical Project Planning (TPP) and Public Meetings were held in July 2017.  Stakeholders, including ADEQ, City of Tucson, AZ State Lands Department and USACE, discussed the QAPP work plan document during both of these meetings and field work began in July

A stakeholders group has met yearly since July 2001 with ADEQ, USACE and the U.S. Environmental Protection Agency (EPA). The stakeholder's group includes members of tribal nations, U.S. Fish and Wildlife Service, U.S. Forest Service, Arizona State Land Department, U.S. Department of the Interior, U.S. Bureau of Land Management, Mohave County and Pinal County. The annual FUDS management action plan stakeholder's meeting or FUDS forum continues to meet each year.

Public meetings to inform the community of Kingman Gunnery range, Fort Huachuca and Sahuarita Air Force Range site activities are ongoing.  Public involvement plans for the RIs at Fort Huachuca and Kingman have been prepared by USACE.


Kingman Gunnery Range: Phase 2 RI sampling was planned for March 2020. However, due to the COVID-19 pandemic this investigation was postponed pending DOD guidelines. The RI sampling resumed in September 2020 and will continue until the end of the year. The USACE is continuing to draft the RI report for the 181 previously investigated parcels. The RI report is currently scheduled for ADEQ review in November 2020. An addendum to the RI will be submitted to ADEQ to address the remaining 60 parcels after sampling is completed.

Fort Huachuca: All four response areas are awaiting funding for the implementation of Institutional Controls and MEC removal where applicable.   

Sahuarita Air Force Range: The munitions field investigation commenced after the TPP and Public Meetings in July 2017. Results of the RI and lengthy field work are pending for late 2018.