Tenders Are Invited For Reconstruction And Rehabilitation Of The Internal Distribution Water Network Within ... in Bulgaria

Work Detail

Villa Zone Zelin Is Located In The Immediate Vicinity Of The Town Of Botevgrad - South Of It. The Predominant Development Is Below The Level Of The Hemus Motorway, But The Area Extends Above It. The Natural Features (Relief, Forest Vegetation, Etc.), Communication (Transport Connections) And The Proximity To The Capital Justify The High Interest In Building Single-Family Residential Buildings In The Area. Zelin Is Supplied With Water From Several Water Sources (River Catchments): Mechata Dolina Catchment, Stublensko Catchment On Zelinska Reka And Catchment Of Echemishka Reka, Located Between Zhenska Polyana And Gumnishta (Bukanin Dol). The Waters From Mechata Dolina Enter The Nr At An Elevation Of 580 M, And The Waters From Stublensko And Echemishka Enter The Nr Zelin (V=2X150m3) At An Elevation Of 525 M. In The Dry Period, The Zelin Network Is Also Supplied With Water From The Extended Water Supply System From The Bebresh Dam. A Pumping Station With A Collection Tank Was Built At An Elevation Of 420 M, Which Increases The Pressure Of The External Supply Water Pipe During This Period. The Existing Network Does Not Supply All Properties And At The Same Time Cannot Satisfy The Needs Of Already Connected Consumers. The Large Difference In The Minimum And Maximum Altitude In The Settlement Implies Water Supply To Separate Areas By Pressure, But These Are Not Separated And The Necessary Independent Power Supplies Are Not Provided For Them. Fire Hydrants - Dn 80 - Above Ground Are Planned, Which Are Located No More Than 150 M Apart. All Phs Should Be Equipped With A Φ80 Mm Shut-Off Valve. In Places, The Distances According To Ordinance No. 8 Cannot Be Observed, Due To The Reduced And Non-Standard Dimensions Of The Roadway And Due To The Illegal / Non-Standard Placement Of A Large Number Of Wires In It, As Well As The Avoidance Of Collisions With Existing Ones. The Construction Of The Water Supply Network Is Almost 90%, But It Is Mainly Represented By Amortized Pipes Of Ac, Steel And Galvanized Steel. Partial Reconstructions With Pehd Were Made At The Sites Of Accidents That Occurred. The Routes Of The Water Pipes Predominantly Pass Outside Street Regulation, And Their Diameters Do Not Comply With The Regulations. A Main Water Supply Branch With A Diameter Of Pehd Dn200 Was Also Built, Which Can Supply Water Quantities From The Mechata Dolina Catchment To Pspv Chekanitsa 2 (Sliviwe), I.E. It Is Transit Highway In Nature And Carries Raw Untreated River Water. On The Territory Of The Villa Area, There Is A Partially Built, Put Into Operation Sewage System, Which Flows Into The Urban Network Of The Town Of Botevgrad And From There Into The Botevgrad Wwtp. Frequent Accidents, Shortage Of Water Quantities And Pressure In The Network And Overall Low Quality Of The Provided Service Were Noted. The Existing Network Does Not Supply All Properties And At The Same Time Cannot Satisfy The Needs Of Already Connected Consumers. A Complete Description Of The Subject Of The Order Is Presented In Detail In The Technical Specification And The Prepared Investment Project - An Integral Part Of The Documentation.

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