Airport Cleaning During Snowstorms: A High-Speed Operation to Ensure Flights

A snowstorm for a modern airport is not a reason to stop operations, but a complex but routine engineering task solved with military precision and speed. The process of snow removal on the runway is a synchronized operation of special equipment, meteorological services, and controllers, where each element is subordinate to a single goal: keeping the runway, taxiways, and aprons in a state as close to dry as possible. A delay of a few minutes here results in millions of dollars in losses and a chain reaction of disruptions in the global aviation network.

Phase 1: Preparation – Work Before Snow

The effectiveness of snow removal is determined by actions taken in advance.

Monitoring and forecasting. The airport meteorological service operates based on its own sensors installed around the perimeter of the field and data from national meteorological agencies. It is not only the expected precipitation that matters, but also the temperature of the runway surface, dew point, wind speed, and direction. The decision to start snow removal is made a few hours before the snowstorm.

Assembling the "snow caravan" (Snow Team/Fleet). This is a special column of equipment, the composition of which is strictly regulated. A typical caravan includes:

Rotary Snowploughs: Powerful machines with a rotating screw and rotor capable of throwing wet and compacted snow up to 50 meters. This is "heavy artillery" for heavy snowfall.

Plough Blowers: Machines that combine an shovel for snow gathering and a fan for its throwing.

Pavers/Tampers: Compact the loose snow to facilitate its subsequent cutting.

Chemical reagent spreaders. They do not use ordinary salt, which causes corrosion of the aircraft skin. Special liquids based on potassium acetate or glycol, as well as solid granulated reagents (urea, potassium formate) are used. Their task is to prevent the formation of a "snow-surface" bond, so that snow can be easily removed mechanically.

Phase 2: Operation – Snow Removal During a Snowstorm

Snow removal is carried out on the principle that "the snowflake should not have time to stick".

The "Follow-the-storm" tactic. The snow removal column is formed in strict order and moves along the runway in a single formation ("train"). Machines go with a minimum interval, covering the entire width of the runway (from 45 to 60 meters). In one pass, they perform a full cycle: cutting, removal, and treatment with a reagent. Work is carried out around the clock as long as it snows.

Priority. The main runway is cleared first, then the parallel one (if there is one), then the critical taxiways leading to it. After that, the rest of the taxiways and aprons. Often, two columns working towards each other are used to double the speed.

Quality control. After each pass, the coefficient of friction (friction) of the surface is measured by special friction machines. Data is transmitted in real time to the control service. A minimum coefficient of friction (usually 0.3-0.4) is required for landing. If the indicator is below, the cleaning continues or the runway is closed.

Phase 3: Logistics and Snow Disposal

Removing snow from the airport territory is a task almost as important as its removal. Snow from the runway cannot be stored nearby due to the risk of attracting birds and creating obstacles. It is transported to special snow dumps outside the airport or, more effectively, melted immediately at stationary snow melting stations. In Helsinki-Vantaa Airport (Finland), a system of heated aprons is used for cleaning, and snow from the runway is removed and melted using excess heat from server centers.

Interesting Facts and Examples:

"20-minute rule" in Switzerland: In large airports such as Zurich, there is an internal standard: the runway must be fully cleared and put into operation within 20 minutes after the end of an intense snowstorm. This requires perfect coordination and preparation.

Thermal chambers in Japan: In airports prone to snowstorms (such as Sapporo New Chitose), giant hangars-snow melting stations are used. Snow is loaded inside, where it melts under the action of heat guns or heat recovery systems.

"Chemical fluid" technology in the USA and Canada: Before a snowstorm, the runway is treated with anti-icing fluid of the type "Kilfrost" or "Safewing". It forms a temporary film that prevents snow and ice from sticking for several hours, making mechanical cleaning easier.

Human factor: Despite automation, the final inspection of the runway is always carried out by an inspector on a special vehicle or even on foot to visually ensure the absence of foreign objects (FOD - Foreign Object Debris), ice, or uncleared areas.

Conclusion: Technological Balance

Snow removal at the airport is a continuous race against time and nature, where victory is determined not by the power of a single machine, but by the coordination of the system. This is a balance between preventive chemical treatment, high productivity of mechanical cleaning, and operational logistics. Modern airports no longer consider snow as an act of God, but as a planned seasonal phenomenon to which they prepare in advance, investing in specialized equipment, training personnel, and creating infrastructure for disposal. Thanks to this, even in the face of the strongest snowstorms, the largest hubs in the world maintain their operability, ensuring global mobility.

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