Design and construction of a section of the third metro line from Shipka Street, through the Slatina district, to Tsarigradsko Shose Boulevard with six metro stations as separate items Design and construction of a metro section from km 0+000.00...

Design and construction of a section of the third metro line from Shipka Street, through the Slatina district, to Tsarigradsko Shose Boulevard with six metro stations as separate items Design and construction of a metro section from km 0+000.00 to km 1+904.00 with two underground metro stations /MS1 and MS2/ and an inter-station ventilation facility
The metro section is 1904 m long. MS1 has a length of 142 m and a gross built-up area (GBA) of 6636.60 sq m. MS2 has a length of 120 m and a GBA of 5097.00 sq m. The ventilation shaft (VS) has clear plan dimensions of 8.80 m x 30.00 m. MS1 is located at the intersection of Geo Milev St. and Cherkovna St. with Sitnyakovo Blvd. Under Sitnyakovo Blvd. there is an existing underpass, which is partially demolished to provide access to the MS1 vestibule. MS2 is located under Geo Milev St. immediately next to the intersection with N. Copernicus St. The metro stations are monolithic reinforced concrete structures. MS1 provides for a traction substation, and MS2 - a substation. The working design, construction, supply of necessary equipment, commissioning tests, and commissioning must be executed in the following parts: Geological and hydrogeological surveys; Alignment, profile, and alignment plan; Geodesy; Architecture; Structures; Track; Contact network – mechanical and electrical part; Electrical systems and installations; Water supply and sewerage (WSS); Heating, ventilation, and air conditioning (HVAC); Automation and telemechanics; Specialized low-voltage and audiovisual systems; Passenger control and fare collection system; Health and Safety Plan (HSP) with temporary traffic organization; Reconstruction of infrastructure within the scope of construction; Vertical planning and landscaping; Fire safety