Lar Dam is a high-relevance water asset in the Hormuz Graph because it sits in the Alborz highlands between Tehran’s demand pressure and northern watershed systems. Its role connects mountain water storage, urban-services resilience, environmental sensitivity, and long-distance water management affecting the capital-region economy. The asset is analytically important because it shows how Tehran’s water security depends partly on infrastructure outside the city itself, linking Mazandaran-side geography, protected upland ecosystems, public utilities, and urban consumption risk in one system.