The project is aimed at improving the living conditions of the critically endangered water macrophyte – the rdest of the long-leaf (Potamogeton praelongus) and the rdest of the Alpine (Potamogeton alpinus) in the left-bank blind arm Orlice near Hradec Králové. The site is part of the rescue program for rdest long-leading in the MoE CR’s gesture. At the same time it is defined as Transitionally Protected Area Arm at the Silver Creek and is part of EVL Orlice and Labe within the NATURA 2000 system.