This project involved redesigning the water supply infrastructure for a newly formed development plot in Sofia’s Botanical Garden area. The work was required following changes to the detailed development plan and the local street layout.

The main engineering challenge was to adapt an existing conceptual utility design to the current planning framework. The originally proposed connection to a primary water main could not be implemented because the planned street infrastructure had not been constructed. A new supply strategy was therefore developed using the existing local water distribution network.

A complete hydraulic model of the water supply system was prepared in Urbano Hydra. The assessment covered the entire 42.92-hectare service area and included demand calculations, pressure checks, normal operating conditions, fire-flow scenarios, and verification of the existing network’s ability to accommodate the additional development.

The analysis demonstrated that part of the existing 110 mm water main needed to be upgraded to 160 mm. This improvement ensures adequate operating pressures and reliable water supply for the planned residential development. The design also includes a new 110 mm water main, fire hydrants, and the required connections to the existing infrastructure.

A stormwater drainage solution was also developed for the new cul-de-sac. Rainfall runoff was calculated and the capacity of the proposed storm sewer was verified.

The project demonstrates an integrated approach to utility infrastructure design, combining urban planning, hydraulic modelling, network assessment, and targeted system upgrades to deliver a reliable and future-ready solution.