Technical Specifications

1. Water Supply System Extension:

• The proposed water supply network extension consists of 32 sections containing PEID pipes with variable diameters between DN75 and DN110, executed over a length of L = 16,288 m.
• The valve chambers will have the following plan dimensions depending on the valve equipment: 1.4x1.4x1.7 m, or 1.4x1.4x2.0 m, or 1.4x1.4x2.2 m, or 1.4x1.4x2.5 m, or 1.5x1.5x2.0 m. These will be constructed from concrete grade C16/20, with reinforcement made of OB 37 and PC 52. The chamber base slab will be 20 cm thick, walls 15 cm thick, and the slab 10 cm thick.
• 31 above-ground fire hydrants, diameter 80 mm, will be installed on the distribution network.
• The designed water supply network includes two types of crossing works: crossings of county roads and crossings of drainage ditches. Their locations are shown in the proposed works plans.
• The county road crossing will be carried out using horizontal drilling method, complying with STAS 9312-87 standards. The pipe protection crossing the road is proposed as an OL metal pipe DN 250 mm.
• The drainage ditch crossings will also be done by horizontal drilling using an OL protective pipe with DN 250 mm.
• Branch chambers will total 720 units, with 1 inlet and 2 outlets, D = 200/160 mm, with Monostrat upper adjustment pieces, height = 1300-1500 mm.

2. Sewerage Network Extension:

• The designed domestic sewerage network consists of 51 main and secondary collectors made from PVC SN8 pipes, DN 250x7.3 and DN 200x5.9, with a total length of L = 15,983 m.
• 367 inspection chambers made from prefabricated elements will be installed at maximum distances of 50 m apart, with some sections allowing up to 80 m depending on terrain slope.
• Wastewater pumping stations (S.P.A.U.) – 8 units.
• PEID pressure pipeline, PN10, DN63 – DN75, SDR 17, length = 2,935 m.
• The chambers are made from prefabricated pipes with sockets and spigots, numbering 367 units, consisting of a base, straight elements, eccentric cones, and fitted with frames and trafficable or non-trafficable covers as appropriate, with access via ladders.
• The designed sewerage network includes three types of crossings: county roads, communal roads, and drainage ditches, as detailed in the proposed works plans.
• The county road crossing will be executed by horizontal drilling, complying with STAS 9312-87. The protection pipe crossing the road is proposed as an OL metal pipe DN 406 mm.
• The crossings of communal roads and drainage ditches will also be done by horizontal drilling, with OL protective pipes DN 406 mm.
• Connection chambers – 240 units – PVC Ø 315 mm with composite covers, with 1 inlet and 3 outlets. These chambers have Monostrat upper adjustment pieces, Class A15. Chamber height is adjustable between 800 and 1250/1800 mm.
• 10 valve chambers have been provided on the pressure pipeline of the pumping station, for wastewater discharge in case of failures. These chambers will be built from reinforced concrete, class C20/25 for structure and C8/10 for leveling concrete, with plan dimensions 1.2x1.5x2.00 m, executed monolithically.