Detailed engineering design consultation for the off-plot Treated Sewage Effluent (TSE) distribution system under the Green Riyadh Program – Lot 5. Scope includes hydraulic design of main and secondary pipelines (over 470 km), pumping stations, reservoirs, intake basins, and related infrastructure connecting Manfuha, Heet, and Al Ha'ir WWTPs to key sites across Riyadh