Managing And Exercising Investor Supervision Over The Design And Performance Of Works For The Investment Task As Part Of The Project Entitled: "Creation Of The Łomża - Białystok Communication Route Through Revitalization Together With The Electrification Of Railway Line No. 49 Łomża - Niadowo And Electrification And Reconstruction Of The Infrastructure Of Passenger Service On The Railway Line No. 36 On The Śniadowo -Łapy Section" [...]