Cabinet of Ministers Regulations No. 505 in 2015 (September 1. No 44 6) provisions for the Latvian et seq of the LBN 229-15 "class A hydroelectric waterworks control ' Issued in accordance with article 5 of the law on construction of the first part of paragraph 3 of rule 1 et seq of Latvia confirmed the LBN 229-15" class A hydroelectric waterworks control "(hereinafter referred to as the LBN 229-15 et seq). 2. The Ministry of economy in cooperation with the relevant technical standards Committee recommends that national bodies for standardisation in relation to these provisions, the reliance and designing standard applicable list. 3. National standardization body in www.lvs.lv tīmekļvietn published their national list of the standards applied by the LBN 229-15 et seq. 4. Projects which are developed in or submitted to the būvvald reconciliation rules for the entry into force of the corresponding period in the normative requirements need not be processed according to LBN 229-15 et seq. of the Newsletters of the Rashness of the Prime Minister's economic Minister Dana Reizniec-oak approved by Cabinet on 1 September 2015 for Regulation No. 505 Latvian et seq of the LBN 229-15 "class A hydroelectric waterworks control" i. General questions 1 et seq (A) determine the requirements of the new class , pārbūvējam and renewable hydroelectric waterworks structures (hereinafter referred to as the waterworks building) design. 2. the terms used in the et seq: 2.1 estimates the size of the hydrographical determine the probability of exceeding the calculated hydrologic measurements (flow rate, water level), which serves as the basis for the waterworks structures important for determining the size and water resource planning. The following estimates for the hydrological values: 2.1.1. calculate the size – the size of hydrologic, which do not allow for any deviations from the designed operating mode; 2.1.2. test hydrological values – values that are non-essential deviations from the designed operating mode, but does not lead to the construction of an emergency; 2.2. the maximum possible flood – floods, calculated theoretically as can be expected, if you match the least favourably meteorological and Hydrographical conditions in any specific area is feasible; 2.3. the guaranteed minimum flow rate – 30 days of summer period minimum flowrate with 95% probability of being exceeded that by controlling runoff, watercourse, always keep if warranted by the river pietec, in the natural evaporation and lower water levels of the service reservoir; 2.4. Hydro-cascade – position of several hydroelectric plants on the same watercourse in such away that the action of one hydroelectric power presents a risk the risk or affect other hydroelectric power stations; 2.5.-the extreme permissible choked State, which should not be exceeded and which correspond to a specific building or structural part of the performance. Bearing capacity is determined according to the damage, not the offset or flexible deformation (which may be regarded as damage) possibility; 2.6. the normal uzstādinājum level-maximum water level under normal operating conditions, the reservoir supports the construction of the waterworks; 2.7. the risk of hazards-a situation which can occur when one of the hidrotehniskaj structures lose stability or strength, and uncontrolled water leak, which could pose a threat to the life and health of the population and the physical and legal persons as well as damage to the environment; 2.8. the flow rate – the amount of water per unit time escapes through the watercourse or the active construction of the cross-sectional area. 3. the Waterworks project in construction, taking into account the predicted effects according to the statutory construction of the essential requirements to the construction at the waterworks structures construction throughout their economically-based life under normal operating conditions ensure a working hydroelectric power high efficiency, reliability, and ease of installation of structures and safety monitoring and operation. 4. the construction of the waterworks project in such a way as to reduce the adverse effects of buildings on the environment. 5. Waterworks in the design of the structure of the standards applicable to national standardisation bodies list of published in the www.lvs.lv tīmekļvietn. 6. Essential requirements hidrotehniskaj structures are taken into account in developing projects under construction with the essential requirements by establishing the operational envelope of the hydroelectric power station and safety oversight. 7. Complex hidrotehniskaj structures (especially if a construction project for new constructions or constructive solutions, the organisation of work in the project for the new works and new technological the equipment or if the work to be conducted under specific conditions) the work of the organisation in the project include research or technological recording developments results, conclusions and recommendations. II. basic conditions of calculation designing the waterworks in 8 buildings, constructions, the base and not exceeding the acceptable choked. Choked is not exceeded, if the following condition is met: x ≤ R × F γlc/γlc – which γc γn loads combination coefficient is 1.0-loads for pamatsakārtojum: under normal operating conditions the first choked, as well as the other choked; 0.95-loads of pamatsakārtojum works and repair during the first choked; 0.90-loads the specific lineup; F-size calculations for generalized force (force, torque, voltage), deformation or other parameter that evaluates choked; R-size calculations for bearing capacity of generalized deformation or other parameter; coefficient γc – working conditions according to the constructions, constructions or the base type, media type, the calculation schema, type zoom choked and other factors. The size of the coefficient fixed in the geotechnical design et seq; γn-safety factor corresponding to the consequences that will arise, reaching choked. The calculation after the first factor γn = 1.25 choked. 9. Calculations make such a combination of factors: assignment 9.1. first (not good) loads and effects choked pamatkombinācij: 9.1.1. normal operating conditions γlc = 1.0; 9.1.2. the construction, conversion or renovation during the γlc = 0.95; 9.1.3. the effects of the loads and specific combination γlc = 0.90; 9.2. calculation after the second (operating) choked γlc = 1.00.10. safety coefficients for the calculation of materials resistance and soil characteristics to take pursuant to the determination and the applicable standards et seq. Calculate the resistance of the individual materials and the bottom States allow the following test results for statistical processing. 11. the calculation of the load is obtained by multiplying the regulatory burden with the overload factor γf. 12. the Waterworks structures, buildings and base the calculation on the second choked assumes that overload factor and safety factor of γf values materials and soil is 1.0, excluding the applicable standards in certain cases. 13. the Waterworks structures calculations used loads and effects of pamatkombinācij and special combinations. 14. The assignment involves standing, pamatkombinācij variable and variable long-term temporary stresses and exposure. The special combination of long standing, include the variable and variable temporary stresses and effect change one of them to load or the special effects. Special load acting in an emergency or natural disaster. 15. Load and exposure calculations assumes the worst, but the circumstances – the real loads combination separately works, maintenance and repair time. 16. The dam of a hydroelectric dam and the height and the caurvad of the novadbūv's ability to calculate and verify with the estimates for the size of the hydrological annual exceedance probability p is 0.1%. 17. Estimates for the size of the hydrological determined using mathematical statistics methods in accordance with direct gauge observations, empirical formulas and izolīnij card or line extension of observations statistical methods appropriate for drainage systems et seq and hidrotehniskaj structures. 18. the Waterworks structures test hydrological values determined that annual exceedance probability p of 0.01%, that is, with the special climatological phenomena or maximize techniques set the maximum possible size of the flood. Hydrological and climatic data, if the reliability of this calculation is equivalent to the greater of the certain, accepted sizes. If the statistical calculations require hydrological data reliability is higher than maximised the climatic data reliability, adopted by mathematical statistical methods with the calculated maximum flow rate 0.01% annual exceedance probability. 19. Loads and effects, which include waterworks structures and their structural strength and stability estimate shall be adopted in accordance with the drainage systems of the et seq and hidrotehniskaj structures and the applicable standards. III. Environmental requirements in the design the design of the 20 waterworks construction, evaluates the construction and operation of the environmental impact of water and the adjacent territory. 21. The design of waterworks shipbuilding, choose the technical solution, which allows it to operate as the natural watercourse of pietec mode to holder housing during operation to ensure construction and environmental protection laws regulating the minimum ecological flow rate guaranteed or watercourse downstream of hidrotehniskaj structures, ensuring minimal impact on their operations conduit downstream structures concerned. 22. Designing hydroelectric cascade waterworks of the construction workers, provides for coordinated action in different ūdenīgum periods. On the basis of the threat risk assessment, determines what actions can be taken with hydro-cascade at the bottom of the existing hidrotehniskaj structures, if hydro cascade top existing waterworks constructions accident. 23. Designing structures, waterworks delivers fish and fish resource protection measures and migration opportunities according to the drainage systems et seq and hidrotehniskaj structures: 23.1. provided in the device, which prevents fish from entering the Chamber in hydropower turbines with a total installed capacity of two megawatts or less; 23.2. constructing paths or fish provides a location for fish migration path water facilities construction with fisheries, where it is requested the opinion of the fisheries inspection activities impact on fish resources. IV. risk assessment of risks 24. assessed the risk of hazards from conception to construction of buildings acceptance into two stages (each of which is determined by different risk level of detail): 24.1. hazard risk assessment a minimum composition construction stage; 24.2. the threat risk assessment, creating the structure safety in the waterworks simultaneously with the building ready for commissioning. 25. risk assessment of risks to assess the conditions that can cause crash structures. the waterworks The assessment determines the waterworks structures constructive elements, which have the greatest likelihood of accidents, and constructive elements that the crash would have the most appludinājum. 26. risk assessment of risks in projects carried out using the flow rate in accordance with paragraph 18 et seq characteristics according to the scenario with the instantaneous collapse of structures subject to the greatest pressure. 27. In drawing up the waterworks structures, safety programs, the risk of exposure is assessed according to the following scenarios: 27.1. the dam overflows with the lowest at that period, if the flow rate accepted in accordance with paragraph 18 et seq of the characteristics and the applicable standards; 27.2. building or constructive element in the crash, which can result in the downstream of the most appludinājum, if at the time of the accident have normal levels of uzstādinājum and pietec up the annual average flow rate corresponds to a 5% annual exceedance probability; 27.3. intensive reservoir runs through all the water novadbūv with full aperture, if at the beginning of the work is a normal level of uzstādinājum and pietec of the river meets the maximum flow rate for the year by 25% annual exceedance probability: 27.3.1. While all the turbines; 27.3.2. If the turbine does not work. 28. the Present and 27.2 27.1 et seq., in the cases referred to evaluate emergency control under the waterworks or constructive element breaking scenarios. Economy Minister Dana Reizniec-oak