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System installed in Boca Chica uses large volumes of water, steel plates, and containment structures to protect the Starship’s orbital platform against heat, vibration, and acoustic energy during static tests and launches.
SpaceX has installed in Boca Chica, Texas, an artificial deluge system to protect the orbital platform used by the Starship/Super Heavy, a rocket and booster set developed by the company for large-scale flights.
The structure uses water-cooled steel plates to reduce the impact of heat, sound, and exhaust generated at the moment of engine ignition, according to documents from the United States Federal Aviation Administration, the FAA.
The solution was integrated into the base after the April 20, 2023 launch, when the first integrated flight of the Starship/Super Heavy damaged the foundation of the platform in Boca Chica, in Cameron County.
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According to the FAA, SpaceX reinforced the foundation with thicker concrete, added support stakes, and installed metal plates over the area as part of the changes made to the launch infrastructure.
The system operates in a stage prior to liftoff, when the base needs to withstand forces capable of affecting concrete, steel, pipelines, and equipment near the launch structure.
In the case of the Super Heavy, the ignition concentrates dozens of Raptor engines under a fixed platform, which requires thermal, acoustic, and structural protection mechanisms before the vehicle leaves the ground.
How the SpaceX platform deluge works
In practice, the water exits tanks installed on the ground, passes through a network of pumps, valves, sensors, and pipelines, and reaches the steel plates positioned under the launch platform.
The discharge occurs through openings in the metal structure itself, forming a protective layer between the steel and the exhaust jet released by the engines during ignition.
According to the FAA, the goal is to quickly cool the area, absorb part of the sound energy, and reduce the effects of the heat produced during static tests and launches.
Without this cooling element, the plates would be more exposed to severe damage and could lose their reusable condition after ignition events, according to the agency’s technical evaluation.
The maximum volume described by the FAA in 2023 is approximately 358,000 gallons of potable water just in the deluge system used on the steel plates.
Converted, this volume is equivalent to about 1.35 million liters, an amount released in a short interval to create a temporary hydraulic barrier under the rocket.
The estimate varies depending on the type of operation performed on the platform, as static tests and launches require different volumes of water in the protection system.
For a static engine test, the FAA cites about 72,000 gallons, or approximately 272,000 liters, applied during the operation of the system.
In a launch, the estimated volume rises to 132,000 gallons, close to 500,000 liters, due to the operational conditions associated with the liftoff of the Starship/Super Heavy assembly.
For the environmental analysis, the agency considered a maximum scenario of 361,000 gallons per operation, adding the main deluge and a separate detonation suppression system.
Water also reduces the risk of detonation at ignition
The detonation suppression system has a distinct function from the main deluge, although it also uses water during ignition events at the Boca Chica orbital platform.
According to the FAA, this mechanism sprays about 3,000 gallons of water towards the engines to reduce the possibility of detonations caused by free methane mixed with air.
Another mechanism, called FireX, is treated separately by the agency and is part of the fire response on the platform, without replacing the cooling of the metal plates.
This system would only be activated in case of fire on site, while the main deluge operates as part of the preparation for static tests and launches.
The water flow begins before ignition, according to the technical description presented by the FAA in the environmental reassessment related to the Starship/Super Heavy program.
The agency reports that the discharge starts five seconds before the engines are activated, when the water is already flowing through the tanks and distribution network to the platform nozzles.
During the operation of the engines, most of this volume comes into contact with extreme heat and turns into vapor and mist near the vertical launch area.
According to the agency’s analysis, about 92% of the 358,000 gallons of the deluge system can be vaporized when the engines are running.
The remainder can be collected by containment structures or dispersed in nearby areas, according to the operational conditions and scenarios evaluated by the FAA.
Boca Chica has water retention and environmental control
The vertical launch area in Boca Chica includes containment structures, retention basins, ponds, and berms to capture part of the water used during operations.
The FAA document states that the collected water can return to the tanks if it meets the quality standards set by the Texas Commission on Environmental Quality, the TCEQ.
When the water does not meet the required criteria, the material must be removed from the vertical launch area and sent for industrial treatment off the platform.
The agency also notes that the containment structures are impermeable, a measure adopted to prevent the percolation of contaminants into the soil and groundwater.
The pressure used to expel the water depends on specific components of the system, including tanks, pumps, valves, sensors, and pipes connected to the metal structure.
Among the items described is a nitrogen-pressurized tank at 3,000 pounds per square inch, connected to the water tanks to provide expulsion force when the deluge is activated.
Sensors, valves, flow meters, and a control unit monitor levels, pressures, flow, and any anomalies during the system’s operation.
With this set of equipment, the operation can trigger or stop the discharge, adjust the water distribution, and monitor the network’s performance during ignition events.
Why water is used in launch bases
The use of water systems is not exclusive to SpaceX and appears in launch and test facilities in different countries, according to the FAA.
The agency cites the Kennedy Space Center in Florida, the Vandenberg Space Force Base in California, the Baikonur Cosmodrome in Kazakhstan, and the Satish Dhawan Space Centre in India.
In these facilities, water systems are used for operational safety, vibration absorption, and protection of infrastructure subjected to heat, noise, and mechanical energy during tests and launches.
In the case of the Starship/Super Heavy, the steel plates are directly exposed to the environment created by the engines, making water cooling a central part of the base’s protection.
During ignition, the metallic surface can also undergo ablation, a process in which part of the material is eroded by heat and mechanical force during operation.
The FAA states that the Raptor engines use liquid oxygen and liquid methane as propellants, with no heavy metals in the fuel or exhaust plume.
Even so, the operation requires control of water, vapor, mist, residues, and containment, because the platform is subjected to concentrated forces in a short time interval.
The 2023 reassessment indicated that the system could operate up to 30 times a year within the scenario analyzed for the orbital platform, including static tests and launches.
In April 2025, the FAA’s final environmental assessment began to consider a proposal for a higher cadence in Boca Chica, with an increase in the maximum water volume from 361,000 to 422,000 gallons in future scenarios.
The launch operation of the Starship/Super Heavy depends, in addition to the engines, on a ground infrastructure prepared to withstand heat, vibration, sound, and pressure during ignition.
In this arrangement, the deluge system acts to preserve the orbital platform before, during, and after the engine ignition, keeping the structure in operational conditions according to the scenarios evaluated by the FAA.
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