Design and Tender Documentation was to be developed for:
- WS.07: a gravity transmission main (DN400, PN10, L ~ 4.2 km) from the main water source to the supply zone and a Break Pressure Tank (BPT) of 100 m³
- WW.09: priority extension of the wastewater collection system in the town center (~ 21 km long) and separation of mixed wastewater system into a separated system
- Two Works and two Tender Documentations were elaborated; the Works were structured as follows:
- Works TD for Water Supply (WS.07)
- Works TD for Wastewater (WW.09), divided into Sections
- Section A: FIDIC Red Book; DD Sewerage System Central & Industrial Zone and Potkrajci 1st Branch, which consists of two Lots:
- Lot 1: Central Zone and Potkrajci 1st Branch
- Lot 2: Industrial Zone
- Section B: FIDIC Yellow Book; Conceptual Design stormwater and Potkrajci 2nd Branch
- Section A: FIDIC Red Book; DD Sewerage System Central & Industrial Zone and Potkrajci 1st Branch, which consists of two Lots: