Naval Air Station Patuxent River will host a public open house Tuesday to walk residents through its Air Installations Compatible Use Zones program, the Navy’s decades-old framework for managing how development near the base interacts with military flight operations.
The meeting runs from 4:30 to 6:30 p.m. Aug. 4 at the Frank Knox Building, just outside NAS Pax River’s Gate 2. Attendees will need a REAL ID-compliant form of identification to enter and should expect bag checks at the door. Base officials have described the format as an open house rather than a formal presentation, giving residents a chance to review AICUZ materials and ask questions of Navy planners directly.
AICUZ, pronounced “ay-kuz” within military circles, is a Defense Department program established to balance aircraft operations at military airfields with safety and quality of life in surrounding communities. Under Department of Defense Instruction 4165.57, which governs the program service-wide, each air installation periodically studies the noise and accident risk generated by its flight operations and maps that data into zones — including “clear zones” immediately around runways where the risk of an aircraft mishap is highest, broader “accident potential zones” extending along typical flight paths, and noise contours measured in day-night average sound levels. Those zones then inform recommendations for what kinds of development — housing, schools, hospitals, industrial uses — are considered compatible in each area, with the goal of preventing new construction from encroaching on the airspace the base needs to operate safely.
NAS Patuxent River has particular reason to keep those zones current. The installation is the largest employer in St. Mary’s County, supporting roughly 9,800 civilian employees, 5,700 contractors and 2,400 active-duty military personnel across more than 14,500 acres, and conducts more than 200,000 air operations annually as home to Naval Air Systems Command headquarters, the Naval Test Pilot School and multiple flight test squadrons. That combination of intensive flight testing and a rapidly growing county around it has made compatible land use a recurring point of engagement — and occasional friction — between the base and St. Mary’s County government in recent years.
The topic has come up repeatedly in joint meetings between Navy leadership and the Commissioners of St. Mary’s County. At a June 9 joint session at the Patuxent River Naval Air Museum, AICUZ and base encroachment were formal agenda items alongside the county’s ongoing Comprehensive Plan update, St. Mary’s 2050, and the Defense Community Infrastructure Program, which funds off-base improvements that support military installations. Base officials have previously briefed commissioners on updated accident potential zones, clear zones and high-noise areas as part of that ongoing coordination, and Navy planners have in past years proposed measures such as required AICUZ disclosure statements for leases on property within the zones, intended to make sure residents and tenants are aware of aircraft noise and safety considerations before moving in.
Local planning documents formally recognize the relationship as a two-way commitment. St. Mary’s County’s own land-use planning materials, developed with input from Navy planners, call for continued coordination with NAS Pax River to protect open space within the AICUZ, support Defense Department efforts to preserve land and habitat buffers around the installation through the Pentagon’s Readiness and Environmental Protection Integration program, and clarify local zoning regulations to ensure new development remains compatible with the base’s noise and safety requirements.
Tuesday’s open house gives residents — particularly those in Lexington Park and other communities bordering the installation — a chance to see current AICUZ maps and ask Navy planners directly how the zones might affect a specific property or development proposal. Base officials have said such sessions are part of a broader effort to keep the community informed as the Navy periodically updates its AICUZ studies to reflect changes in aircraft type, flight patterns and testing activity at the installation.
Additional information on AICUZ boundaries affecting specific St. Mary’s County properties is available through the county’s geographic information system mapping tools. Residents unable to attend Tuesday’s session can direct questions to NAS Patuxent River’s Community Planning Liaison Officer, the Navy’s designated point of contact for AICUZ-related inquiries from surrounding communities.
