Subject

OPreparation of complete technical documentation together with accompanying services, including author's supervision over the implementation of the project "Construction of a dry flood protection reservoir Boboszów on the Eastern Neisse River".

THE PURPOSE OF THE INVESTMENT

The direct benefit of building a dry "Boboszów" flood protection reservoir on the Nysa Kłodzka River is the flood protection of Boboszów and Międzylesie towns and, together with the "Roztoki Bystrzyckie" reservoir, also of Bystrzyca Kłodzka and indirectly of Kłodzko towns located in the Międzylesie commune, Kłodzko County in the Lower Silesia Voivodeship. These towns were particularly affected by the great flood of 1997.

Scope of the development

The scope of the development included:

Basin facilities design, in particular:

• Design of the earth dam including the formation of the upper position (the foreground of the dam) and the lower step.
• Design of drain devices consisting of an inlet section, a tunnel (flow channels with floodlights, communication gallery with the entrance building) and an outlet section (an outlet trough with a transition section) and overflow devices located along the abutment of the right dam in the form of a slope overflow with a service bridge.
• Project of a fragmentary regulation of the Eastern Neisse River bed in the lower and upper step position.
• Design of service roads.
• Design of the back-up building.
• Design of forming reservoir basin.
• Design of control and measurement devices and object automation.
• Design of planting and shaping of green elements in the area of the planned investment.
• Project of technical infrastructure installation in the scope of construction of new networks for the needs of the designed object related to the connection of the object to the electrical and telecommunication network, power supply, lighting, control and sanitary installations.

Design of redeployment or demolition of existing elements colliding with the investment, in particular:

• Project of cable MV 20kV overhead line - demolition and construction in the new location.
• Project of repositioning an overhead and cable low-voltage line - demolition and construction in a new location.
• Project of repositioning an overhead telecommunication line - demolition and construction in a new location.
• Design of demolition of buildings and cubature buildings together with utility buildings and connections colliding with the planned investment.
• Design of a new section of the municipal road No. 119952D in a location not colliding with the designed 1.2km long reservoir.

Project of technological works related to the implementation of the investment, in particular:

• The project of repositioning the river bed of the Eastern Neisse River in the section colliding with the investment for the time of construction of discharge equipment.
• Design of building pits (foundation pits) for the construction of dams and discharge devices.
• Design of service roads related to the implementation of the investment.

Under the contract, a multi-variant concept was developed, a project information sheet, an environmental impact report with a decision on the environmental conditions for the execution of the project, water law reports for the execution of water structures with a decision on the water law permit, a construction project with a decision on the permit for the execution of the flood control project, executive documentation, cost, specifications for the execution and acceptance of works.

Basic parameters of the objects

Technical parameters of the basin:

• Hydrotechnical class of embankments - II and III class.
• The authoritative flow with a probability of occurrence of p= 0.5% - Qm = Q 0.5% = 51.0 m3-s-1.
• Control flow with probability of occurrence p=0.2% plus estimation error - Qk = Q 0.2+? = 89.0 m3·s-1.
• Max. water damming level - 499.70m above sea level
• Reservoir capacity with maximum filling - 1.42 million m3.
• Reservoir area with maximum filling - 21.20 ha.

Technical parameters of the dam:

• Dam length - 230.0m;
• Maximum dam height - 17.0m;
• The dam body - earth.
• Substrate sealing - waterproof membrane.
• Body sealing - PVC screen topped with a sill.
• Drain removal - stone drainage, relief wells.

Technical parameters of discharge equipment:

• Total length of discharge equipment - 137.20 m;
• Dimensions of the main drain adit clearance - 4.00 m x 4.00 m.
• Dimensions of the emergency drain adit clearance - 1.70 m x 2.90 m.
• Dimensions of the gallery clearance - 1.70 m x 3.20 m.
• Total length of overflow devices - 311.40 m
• Length of the main overflow - 18.00 m.
• Length of emergency overflow - 14.00 m.