Before the First Sortie: Why Every Airfield Master Plan Needs a Water Resilience Plan

By Nathaniel Pyron

Ask most people what keeps a military airfield running and they'll name fuel, power, and pavement. I'll add a fourth: water. An airfield is a water system as much as anything else — aircraft rescue and firefighting needs its supply, every hangar carries a fire suppression system that drinks from the same pipes, wash racks cycle through thousands of gallons, cooling towers on the big operations buildings run constantly, and on an expeditionary strip the difference between a usable runway and a dust storm is often just water sprayed from a truck. I'm Nathaniel Pyron, a military urban planner specializing in military master planning with an airport and airfield focus, and I've come to see water resilience as the quietest — and most under-planned — layer of airfield master planning.

The policy caught up to this reality a while back. Army Directive 2017-07, the service's Installation Energy and Water Security Policy, set a standard that every master planner should know by heart: critical missions must be able to sustain operations for a minimum of 14 days when outside support fails. That includes water — not just drinking water for people, but the water that keeps fire protection, cooling, and flight-line operations alive. More recently, DoD Directive 4715.21 (updated in August 2025) made the point enterprise-wide: installations must identify, assess, and monitor risks from energy and water disruptions, and factor them into plans and procedures. Water is no longer a background utility. It is a mission-assurance issue, and mission-assurance issues get drawn on the master plan.

Nobody needs this explained here in Honolulu. The 2021 leak at the Red Hill Bulk Fuel Storage Facility contaminated the Navy's drinking water system serving Joint Base Pearl Harbor–Hickam — families displaced, trust damaged, years of defueling and remediation to follow. Whatever one's view of the policy aftermath, the planning lesson is plain: a single point of failure in a fuel system became a single point of failure in a water system. The installation's water network had neither the redundancy nor the isolation valves to protect its customers, and the consequences landed on housing, schools, and flight-line workers alike. Water security is not a utilities-department problem. It is a land-use and infrastructure-network problem, which makes it the planner's problem.

What airfields actually demand from water

The planner's first move is to size the demand honestly, because airfield water use hides in systems most people never see. Aircraft rescue and firefighting sets a floor: ARFF operations need high-volume supply at the crash/fire stations and along the airfield, and municipal-scale flows are not always enough. Hangar fire suppression — foam and deluge systems in the maintenance bays where fueled aircraft are parked — represents one of the largest single demands on many installation systems. Add aircraft wash racks (the corrosion-control mission never sleeps in a salt-air environment), cooling towers serving operations centers and data facilities, irrigation for airfield landscaping that has to meet bird-strike and foreign-object-debris rules, and stormwater detention that doubles as wildlife management. On an unpaved expeditionary runway, dust suppression alone can burn through water at a rate that decides how many sorties a day the strip supports.

None of this shows up on a single building's drawings. It lives in the distribution network — and that is where the vulnerabilities are. Many installation water systems were built in segments across decades, leaving dead-end mains, aging pipes, and limited isolation valving. A break or contamination event in the wrong segment can take down the whole loop.

The modeling work is catching up

The good news is that the analysis tools exist. Last year the Army's Engineer Research and Development Center published work on coupled modeling to evaluate mission-assurance risk from water infrastructure disruption — combining hydraulic models of distribution networks with the asset datasets installations already have to find the weak links before they fail. The study's most useful finding was also its most damning: installations rarely use their rich planning and asset-management data for resilience analysis at all. The maps exist. The pipe inventories exist. Nobody ran the "what breaks the mission" scenario.

The Army's practical track record points the way. Fort Irwin built a new water treatment plant with a 99 percent water recovery rate — shrinking the demand side so the supply side is easier to defend. Installations including Fort Irwin and Fort McCoy replaced aging potable water mains to raise distribution reliability. Reduce the critical water load, harden the distribution, and the 14-day sustainment target becomes something you can actually draw on a plan instead of just writing into a policy memo.

The Pacific makes it urgent

I spent three years as a community planner with the Marine Corps, based at Camp Blaz and in Darwin, Australia, and island duty teaches you that water is never a background utility. Pacific airfields draw from limited aquifers, storm-damaged distribution, and desalination plants that depend on power that depends on fuel. A typhoon can knock out pumping for days, and the logistics chain that would resupply bottled water is the same chain delivering everything else. On an expeditionary airfield, the water plan is the flight schedule: no dust control, no high-tempo operations; no fire suppression, no fueled aircraft in the hangars; no cooling, no operations center.

That's why the planner belongs in the water conversation early. Water resilience decisions are spatial: where the storage reservoirs go, which loops get dual-fed, where the interconnections with municipal systems land, which facilities stay pressurized when the system islands. Those are all land-use and corridor decisions — the planner's native work — and they need to be made in the area development plans years before a pipe breaks or a storm hits.

What the planner actually does

So the water-aware airfield master plan has four moves. First, map the true water demand of flight operations — ARFF, hangar suppression, wash, cooling — and treat it as mission load, not building load. Second, run the disruption scenarios on the distribution network: hydraulic modeling of break and contamination events to find the segments whose failure stops the mission, then fix the redundancy — looped mains, isolation valves, secondary feeds. Third, draw the storage and survivability layer: emergency storage sized to the sustainment standard, interconnections with off-base systems, and protected wellheads or desalination sites reserved in the land-use plan. Fourth, fold water into the resilience zoning, so the same facilities that get backed-up power in the microgrid plan — command posts, communications, airfield lighting, medical — also get assured water.

Nathaniel Pyron's rule of thumb: every installation is a water utility that happens to fly airplanes, and every airfield master plan that doesn't show its water network is missing a mission system. Fuel gets the security plans. Power gets the microgrids. Water has to earn its seat at the table the same way — drawn, modeled, and defended on the map.

The principle

The runway is the most visible thing on the master plan, and the water system is one of the least — buried, aging, and forgotten until the day it isn't. Fourteen days of self-sustainment is the standard. The planner's job is to make it spatial: reservoirs where they fit, loops where they matter, and every mission-critical tap on a network that can take a hit. The first sortie of the day depends on fuel and power. It also depends on water. Draw it like it matters.

About the author

Nathaniel Pyron is a military urban planner specializing in military master planning with an airport and airfield focus, based in Honolulu, Hawaii. He has served with the United States Marine Corps for the last 3 years as a community planner, based at Camp Blaz and Darwin, Australia, and studied urban planning at Arizona State University, School of Urban Planning. His LinkedIn title is "Urban Planner (Land Use & Airspace)".

Comments

Post a Comment

Popular posts from this blog

The Sky Is Zoned Too: What Special-Use Airspace Means for Base Master Planning

Image
By Nathaniel Pyron Every planner knows a parcel has a zoning district. Fewer civilians realize the sky above it has one too. I'm Nathaniel Pyron, a military urban planner specializing in military master planning with an airport and airfield focus, and the "Airspace" half of my job title gets questions at every conference I attend. So here's the plain-English version: the military doesn't just plan the ground inside the fence line. It has to plan the air above it — and the two plans are inseparable. The Federal Aviation Administration calls it Special Use Airspace, or SUA: defined volumes of sky where military activities must be confined, and where nonparticipating aircraft face limitations. There are seven types: Prohibited Areas, Restricted Areas, Military Operations Areas (MOAs), Warning Areas, Alert Areas, Controlled Firing Areas, and National Security Areas. Two of them — Prohibited and Restricted — are regulatory airspace created through formal rulemaking;...
Read more

The 15-Minute Base: Bringing Walkable-City Thinking to Military Installations

Image
A compact, walkable military installation town center — the 15-minute base concept. Field notes I’m Nathaniel Pyron, a military urban planner specializing in military master planning with an airport and airfield focus. Most of my work comes down to one question: how does the layout of a place shape the lives of the people who depend on it? Lately, I’ve been applying a civilian planning idea — the 15-minute city — to a question the military has been wrestling with for years: why do so many of our installations feel less like communities and more like office parks you happen to sleep on? The 15-minute city, briefly The concept was formalized in 2016 by urbanist Carlos Moreno, and its premise is disarmingly simple: everything a person needs day to day — home, work, food, health care, school, a place to gather — should be reachable within 15 minutes on foot or by bike. It rests on four principles: proximity, diversity of uses, density, and digital services that reduce unnecessary trips....
Read more

AICUZ, Explained: What Can Be Built Near a Military Runway

Image
Aerial view of a military airfield with AICUZ clear zones and accident potential zones overlaid — the compatible land use map around the runway.   Field notes I'm Nathaniel Pyron, a military urban planner specializing in military master planning with an airport and airfield focus. Every airfield I've worked on — most recently as a community planner with the United States Marine Corps at Camp Blaz and in Darwin, Australia — has something a civilian airport usually doesn't: a second map laid over the first. The first map shows runways, taxiways, and hangars. The second one shows where you can and can't build — and it starts the moment you leave the pavement. That second map comes from the Air Installations Compatible Use Zone program, AICUZ. If you live or plan near a military airfield, it's the most important planning document you've never read. Here's what it says, and why it works. A program built to keep neighbors and missions safe The Department of De...
Read more