Drone Rules for As Três Caixas d'Água
The airspace over and surrounding the Monumento das Três Caixas d’Água (Porto Velho, RO) is classified as a highly restricted Critical Airport Approach Buffer, Cultural Heritage, and High-Density Urban Safety Zone.
The Monumento das Três Caixas d’Água (affectionately known as the Três Marias) is the central historical landmark of Porto Velho, Rondônia. Imported from the United States and erected between 1910 and 1912 by the Madeira-Mamoré Railway Company, these three elevated iron water tanks are featured on the municipality's official flag and coat of arms, symbolizing the birth of the Amazonian capital.
Operating an unauthorized civilian drone in this square is strictly illegal due to severe logistical and aeronautical constraints:
Direct Runway Landing Funnel: Geographically, the monument sits directly within the critical low-altitude approach corridor for Porto Velho International Airport - Governador Jorge Teixeira de Oliveira (PVH). Commercial passenger flights and heavy military transport aircraft slice through this specific city sector at very low altitudes during their final descent. An uncoordinated drone here creates an instant risk of a catastrophic aviation strike.
Proximity to Government and High-Voltage Infrastructure: The plaza sits adjacent to state administrative structures, historical assets, and a dense network of urban power lines. The high potential for radio frequency interference in this central grid poses a severe risk of drone "flyaways" or sudden battery drops into busy pedestrian avenues.
The airspace is actively monitored by airport control radars and municipal security networks. Any civilian drone attempting to fly over the Três Marias without an exceptional, specialized tactical authorization cleared through DECEA's SARPAS NG will be immediately grounded. Operators face equipment confiscation and severe federal penalties under DECEA instruction ICA 100-40.