Standard Maintenance Services. Construction maintenance works for the buildings, including but not limited to the following: Cleaning the building indoor and outdoor areas; water blasting; waterproofing; roof insulation; painting; repair and maintenance of the electrical and plumbing facilities; restorations / reconstructions of local damages on walls, roofs and fences; coatings; window and door frame replacements; tile placement/replacement; painting of metal fixtures (pipes, rails, bannisters), metal structures etc. Supervising and monitoring the structural elements of the aqueducts, which includes but is not limited to the following tasks: o Inspecting the aqueduct for any overflow, subsidence, damages etc. o Inspecting and cleaning the grates o Periodically clearing the vegetation that is in contact with the channel slopes o Carrying out extended interventions (cleaning, repairing, waterproofing) o Carrying out local restorations and small-scale interventions on the structural elements of the aqueducts o Carrying out topographic surveys Drainage structures o Opening new trenches and excavating new ones to collect ▇▇▇▇▇▇▇▇▇▇ o Cleaning the culverts using mechanical and manual means Excavations - Backfilling o Deepening - widening - cleaning of river or torrent beds o Trench excavating and backfilling Reconstructing and maintaining access/inspection roads at the aqueducts and the EWSS facilities Installing, maintaining and replacing security measures along the aqueduct Such measures include but are not limited to the following: o Maintaining or building safety walls, rails and fences in every facility. o Installing warning/prohibition signs Concrete laying / reinforcements Waterproofing Sandblasting, water blasting and painting to maintain metal fixtures. Piping structures o Repairing and replacing pipes of different cross-sections in cases of damage o Installing new water supply pipes o Installing new drain pipes o Carrying out the general repair and maintenance of the expansion joints o Installing water connections o Maintaining - repairing - replacing gate valves and bleed valves o Maintaining - repairing - replacing sluice gates o Maintaining the ▇▇▇▇▇ and other operational elements of the aqueducts Keeping the pumping station facilities in constant operational readiness: o The electromechanical and hydromechanical facilities of the pumping stations (substations, transformer, pumping stations distribution switchboards and control panels, pump motors, gate valves, floating pumping stations, floaters, hydraulic shock protection systems, etc.) Maintenance of the Metering System (level indicators, flow meters, water quality instrumentation etc.) Waterproofing interventions for sealing leaks at the open aqueducts o Repairing/waterproofing leaks inside the aqueducts, using suitable divers. o Repairing/waterproofing leaks outside the aqueducts, using suitable waterproofing materials. Maintenance of fixed and automatic grates o Maintaining the oil dynamic unit and the hydraulic circuit o Maintaining the conveyor belt and other accessories o Maintaining the electrical panels o Replacing the fixed grates with automatic grates in areas of special operational concern Clearing the grounds and cutting down trees along the aqueducts The cost of standard maintenance also includes the cost of replacement any equipment that cannot be repaired or maintained, except for the replacement of large pumping systems over 1,000 HP (Viliza- Asopos section), which are given in the following table. Power (HP) Operating voltage(V) Number of similar pumps Installation 1,850 6,000 4 A1, New Asopos pumping station 1,850 3,000 4 A0, Old Asopos pumping station 1,700 3,000 3 Viliza central pumping station
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Standard Maintenance Services. Construction maintenance works for the buildings, including but not limited to the following: Cleaning the building indoor and outdoor areas; water blasting; waterproofing; roof insulation; painting; repair and maintenance of the electrical and plumbing facilities; restorations / reconstructions of local damages on walls, roofs and fences; coatings; window and door frame replacements; tile placement/replacement; painting of metal fixtures (pipes, rails, bannisters), metal structures etc. Supervising and monitoring the structural elements of the aqueducts, which includes but is not limited to the following tasks: o Inspecting the aqueduct for any overflow, subsidence, damages etc. o Inspecting and cleaning the grates o Periodically clearing the vegetation that is in contact with the channel slopes o Carrying out extended interventions (cleaning, repairing, waterproofing) o Carrying out local restorations and small-scale interventions on the structural elements of the aqueducts o Carrying out topographic surveys Drainage structures o Opening new trenches and excavating new ones to collect ▇▇▇▇▇▇▇▇▇▇ o Cleaning the culverts using mechanical and manual means Excavations - Backfilling o Deepening - widening - cleaning of river or torrent beds o Trench excavating and backfilling Reconstructing and maintaining access/inspection roads at the aqueducts and the EWSS facilities Installing, maintaining and replacing security measures along the aqueduct Such measures include but are not limited to the following: o Maintaining or building safety walls, rails and fences in every facility. o Installing warning/prohibition signs Concrete laying / reinforcements Waterproofing Sandblasting, water blasting and painting to maintain metal fixtures. Piping structures o Repairing and replacing pipes of different cross-sections in cases of damage o Installing new water supply pipes o Installing new drain pipes o Carrying out the general repair and maintenance of the expansion joints o Installing water connections o Maintaining - repairing - replacing gate valves and bleed valves o Maintaining - repairing - replacing sluice gates o Maintaining the ▇▇▇▇▇ and other operational elements of the aqueducts Keeping the pumping station facilities in constant operational readiness: o The electromechanical and hydromechanical facilities of the pumping stations (substations, transformer, pumping stations distribution switchboards and control panels, pump motors, gate valves, floating pumping stations, floaters, hydraulic shock protection systems, etc.) Maintenance of the Metering System (level indicators, flow meters, water quality instrumentation etc.) Waterproofing interventions for sealing leaks at the open aqueducts o Repairing/waterproofing leaks inside the aqueducts, using suitable divers. o Repairing/waterproofing leaks outside the aqueducts, using suitable waterproofing materials. Maintenance of fixed and automatic grates o Maintaining the oil dynamic unit and the hydraulic circuit o Maintaining the conveyor belt and other accessories o Maintaining the electrical panels o Replacing the fixed grates with automatic grates in areas of special operational concern Clearing the grounds and cutting down trees along the aqueducts The cost of standard maintenance also includes the cost of replacement any equipment that cannot be repaired or maintained, except for the replacement of large pumping systems over 1,000 HP (Viliza- Asopos Yliki section), which are given in the following table. Power (HP) Operating voltage(V) Number of similar pumps Installation 1,850 6,000 4 A1, New Asopos 2,500 6,600 5 Yliki central pumping station 1,050 500 2 Yliki central pumping station 1,850 3,000 4 A0, Old Asopos 6,300 6 ΑΔ1 pumping station 1,700 3,000 3 Viliza central 1,850 6,300 6 ΑΔ2 pumping station 1,850 6,300 6 ΑΔ3 pumping station
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Standard Maintenance Services. Construction maintenance works for the buildings, including but not limited to the following: Cleaning the building indoor and outdoor areas; water blastingspraying; waterproofing; roof insulation; painting; repair and maintenance of the electrical and plumbing facilities; restorations / reconstructions of local damages on walls, roofs and fences; coatings; window and door frame replacements; tile placement/replacement; painting of metal fixtures (pipes, rails, bannisters, etc.), metal structures etc. Supervising Maintenance of electromechanical installations o Replacing the lamps at the lighting systems (safety lights in underground areas, external lights, street lights, building lighting systems). o Maintaining the elevator. o Maintaining, repairing and monitoring upgrading the structural elements electrical panels; installing new electrical panels to ensure proper operation of the aqueducts, which includes but is not limited dam facilities or their conformance to the following tasks: o Inspecting the aqueduct for any overflow, subsidence, damages new regulations and provisions etc. o Inspecting Restoring the communications system proper operation within the underground areas, by using only the consumables for the systems that are already installed. Procuring and cleaning the grates installing new devices or designing and implementing a new system, when repair is not possible. o Periodically clearing maintaining, restoring proper operation and procuring monitoring instrumentation for the vegetation dam performance, and early warning systems for the populations downstream of the dams. o Periodically maintaining and restoring the proper operation of the installed meteorological stations and the other measuring instruments that is are necessary to prepare the water resource Management Plans, as well as procurement of new equipment to replace or expand the stations. o Replacing the metal cable trays inside the galleries, due to oxidation. o Maintaining the drainage pumps, in contact accordance with the channel slopes o Carrying out extended interventions (cleaningmanufacturer’s instructions or the operating hours and procuring new pumps, repairing, waterproofing) o Carrying out local restorations when maintenance and small-scale interventions on the structural elements of the aqueducts o Carrying out topographic surveys Drainage structures o Opening new trenches and excavating new ones to collect ▇▇▇▇▇▇▇▇▇▇ o Cleaning the culverts using mechanical and manual means Excavations - Backfilling o Deepening - widening - cleaning of river or torrent beds o Trench excavating and backfilling Reconstructing and maintaining access/inspection roads at the aqueducts and the EWSS facilities Installing, maintaining and replacing security measures along the aqueduct Such measures include but are repair is not limited to the following: possible. o Maintaining or building safety walls, rails and fences in every facilitythe sluice gates. o Installing warning/prohibition signs Concrete laying / reinforcements Waterproofing Sandblasting, water blasting and Changing the oil the hydraulic circuits; inspecting the screw connections; painting to maintain the metal fixtures. Piping structures o Repairing Recharging the fire extinguishers and replacing pipes of different cross-sections in cases of damage o Installing procuring new water supply pipes o Installing new drain pipes o Carrying out fire extinguishers to replace the general repair and maintenance of existing ones due to aging or to improve the expansion joints o Installing water connections o Maintaining - repairing - replacing gate valves and bleed valves o Maintaining - repairing - replacing sluice gates o Maintaining the ▇▇▇▇▇ and other operational elements of the aqueducts Keeping the pumping station facilities in constant operational readiness: o The electromechanical and hydromechanical facilities of the pumping stations (substations, transformer, pumping stations distribution switchboards and control panels, pump motors, gate valves, floating pumping stations, floaters, hydraulic shock protection systems, etcfire suppression system.) Maintenance of the Metering System (level indicators, flow meters, water quality instrumentation etc.) Waterproofing interventions for sealing leaks at the open aqueducts o Repairing/waterproofing leaks inside the aqueducts, using suitable divers. o Repairing/waterproofing leaks outside the aqueducts, using suitable waterproofing materials. Maintenance of fixed and automatic grates o Maintaining the oil dynamic unit and the hydraulic circuit o Maintaining the conveyor belt and other accessories o Maintaining the electrical panels o Replacing the fixed grates with automatic grates in areas of special operational concern Clearing the grounds and cutting down trees along the aqueducts The cost of standard maintenance also includes the cost of replacement any equipment that cannot be repaired or maintained, except for the replacement of large pumping systems over 1,000 HP (Viliza- Asopos section), which are given in the following table. Power (HP) Operating voltage(V) Number of similar pumps Installation 1,850 6,000 4 A1, New Asopos pumping station 1,850 3,000 4 A0, Old Asopos pumping station 1,700 3,000 3 Viliza central pumping station
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Standard Maintenance Services. Construction maintenance works for the buildings, including but not limited to the following: Cleaning the building indoor and outdoor areas; water blasting; waterproofing; roof insulation; painting; repair and maintenance of the electrical and plumbing facilities; restorations / reconstructions of local damages on walls, roofs and fences; coatings; window and door frame replacements; tile placement/replacement; painting of metal fixtures (pipes, rails, bannisters), metal structures etc. Supervising and monitoring the structural elements of the aqueducts, which includes but is not limited to the following tasks: o Inspecting the aqueduct aqueducts for any overflow, subsidencesedimentation, damages damages, landslides and any type of risk in the wider area etc. o Monitoring and systematically recording leaks and any type of risks. o Inspecting and cleaning the grates o Periodically clearing the vegetation that is in contact with the channel slopes o Carrying out extended local interventions (cleaning, repairing, waterproofing) o Carrying out local restorations and small-scale interventions on the structural elements of the aqueducts o Carrying out topographic surveys Drainage structures o Opening new trenches and excavating new ones to collect ▇▇▇▇▇▇▇▇▇▇ o Cleaning the culverts using mechanical and manual means Measurement drills o Performing rotary drilling of exploratory boreholes and control boreholes o Carrying out rotary percussive drilling to install instruments Excavations - Backfilling o Deepening - widening - cleaning of river or torrent beds o Trench excavating and backfilling Reconstructing and maintaining access/inspection roads at the aqueducts and the EWSS facilities Installing, maintaining and replacing security measures along the aqueduct Such measures include but are not limited to the following: o Maintaining or building safety walls, rails and fences in every facility. o Installing warning/prohibition signs Concrete laying / reinforcements Waterproofing Sandblasting, water blasting and painting to maintain metal fixtures. Piping structures o Repairing and replacing pipes of different cross-sections in cases of damage o Installing new water supply pipes o Installing new drain pipes o Carrying out the general repair and maintenance of the expansion joints o Installing water connections o Maintaining - repairing - replacing gate valves and bleed valves o Maintaining - repairing - replacing sluice gates o Maintaining the ▇▇▇▇▇ and other operational elements of the aqueducts Keeping the pumping station facilities in constant operational readiness: o The electromechanical and hydromechanical facilities Maintenance of the raw water pumping stations o Repairing damages in pipes o Repairing damages in the electromechanical equipment o Upgrading and replacing the electromechanical equipment (substationspumps, transformermotors, pumping stations distribution switchboards and control electrical panels, pump motorstransformers), gate valves, floating except for the replacement of large pumping stations, floaters, hydraulic shock protection systems, etc.over 1,000 HP at the Yliki branch o Repairing and upgrading the supervisory system (SCADA) Maintenance of regulating structures (inverted V type, energy dissipators) o Repairing damages in pipes o Repairing damages in the Metering System electromechanical equipment o Maintaining, upgrading or replacing the metal sluice gates (level indicators, flow meters, water quality instrumentation etc.if required) Waterproofing interventions for sealing leaks at the open aqueducts o Repairing/waterproofing leaks inside the aqueducts, using suitable divers. divers o Repairing/waterproofing leaks outside the aqueducts, using suitable waterproofing materials. Maintenance of fixed and automatic grates o Maintaining the oil dynamic unit and the hydraulic circuit o Maintaining the conveyor belt and other accessories o Maintaining the electrical panels o Replacing the fixed grates with automatic grates in areas of special operational concern Clearing the grounds and cutting down trees along the aqueducts Maintaining the automation systems Maintaining the Metering System (level indicators, flow meters, water quality instrumentation etc.) Maintaining the hardware and software of all information systems The cost of standard maintenance also includes the cost of replacement replacing any equipment that cannot be repaired or maintained. The main purpose of the facilities in the Lake Yliki area is the safe transfer of raw water, except through pumping, as a backup water resource for the replacement Athens water supply network. Since the key objective of large the water supply system is to mainly operate in free-flow and avoid the use of pumps that have associated electricity costs, during Standard Operation the pumping systems over 1,000 HP stations are normally kept at a state of operational readiness, to handle emergencies. In some cases, during Standard Operation, the pumping stations operate at a low pumping level. This is done in order to achieve the sufficient and necessary water flow at the Yliki aqueduct, to limit, to the extent possible, water quality degradation, due to stagnancy and intense solar radiation, especially during the warmer months (Viliza- Asopos sectionSpring to Autumn) and to ensure the structural stability of the aqueduct. If the Contractor deems it necessary, in order to ensure the functionality of the pumping stations, test operation of the facilities is carried out. This way, the Yliki branch upstream of Viliza must always be kept at a state of readiness, in terms of the quality of the supplied water, and the System must be able to immediately transfer adequate quantities to ensure the alternative supply. The Distomo aqueduct and the pumping facilities of the Copais field are used to transfer raw water from the underground aquifer, through pumping, up to the Mornos Aqueduct (Distomo area). The operation of these facilities is always considered an Emergency Operation. In accordance with Table 3, which the well drills on the Copais field are given in inoperative today, and the following table. Power (HP) Operating voltage(V) Number of similar pumps Installation 1,850 6,000 4 A1Contractor shall not be obliged to repair, New Asopos operate and maintain either them or the accompanying pumping station 1,850 3,000 4 A0stations ΑΔ1, Old Asopos pumping station 1,700 3,000 3 Viliza central pumping stationΑΔ2 & ΑΔ3.
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