云贵鄂渝水土保持项目大坝安全指南

Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized YPWR_SD_DS (CHS) E1238, Vol. 6 2005 12 14  1 1 1991 2 1995 3 OP 4.37 1 1-1 15 15 1-2 6ü10 1-3 6ü 10 1-4 10ü 15 1 2 2 2-1 2-2 7 9 1 2 3 4 5 3 üü 3-1 3-2 1 2 3 4 (5) 6 3-3 1 2) 3 4 5 6 7 3 8 4 3-4 3-5 3-6 4 9 21.4 3 140 5 (a) (b) • • (c) (d) (e) (f) 1-1    1.1  1.2    1.3   1.4   1.5                D E D E   D  E F  G H  D D J 65 65v L  65DÃ ,                                                                                   F  G     3  ,     W      0&8 E $'$6 F BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB D E  F    ,, ) ,,,     D E             ,9   D E F G H I  9            5 Name. Province County Subwatershed Total Dam type Height Time of Downstream Recent dam saftey Actions / Reservoir Related Capacity completion Populaton review( taken to (10^ treat the m dam 6 m3 Time Result LongQin Yunan HeJieChong 0.22 Homogeneous 21.5 1982 900 1999 I Category gBa Muding Earth Dam DaZa Yunan HeJieChong 0.01 Homogeneous 11.6 1955 200 2001 I Category Muding Earth Dam YangBei Yunan HeJieChong 0.01 Homogeneous 11.0 1973 80 2001 I Category LongJingBa Muding Earth Dam ChaHeZha Yunan PaiFang 0.40 Homogeneous 18.3 1962 2500 2000 II Category Muding Earth Dam JinLongZha Yunan PaiFang 0.26 Homogeneous 18.1 2000 1500 2001 I Category Muding Earth Dam WangLong Yunan PaiFang 0.12 Homogeneous 15.0 1992 120 2000 I Category JingBa Muding Earth Dam BaiJieCh Yunan MiCun 0.10 Homogeneous 18.0 1959 650 2001 II Category ong Muding Earth Dam  HuaYuan Yunan MiCun 0.16 Homogeneous 22.0 1976 2000 2001 I Category Muding Earth Dam QingLongZha Yunan MiCun 0.24 Homogeneous 23.0 1987 2000 2001 I Category Muding Earth Dam YuanFengZh Yunan PuCun 0.10 Homogeneous 17.0 1960 1050 2001 II Category a Muding Earth Dam LeSheZha Yunan FengLe 0.30 Homogeneous 16.0 1986 1200 2001 I Category Muding Earth Dam LongWangZh Yunan FengLe 0.12 Homogeneous 18.0 1973 810 2001 I Category a Muding Earth Dam XiaoJiuLong Yunan GaoPing 0.60 Homogeneous 28.0 1960 2100 2001 I Category Muding Earth Dam XinCun Yunan BeiTing 0.15 Homogeneous 12.0 1958 1950 2000 I Category Muding Earth Dam ZhaoDaBa Yunan XinQiao 0.21 Homogeneous 16.0 1958 1846 2001 I Category Muding Earth Dam WeiXing Yunan XinQiao 0.24 Homogeneous 12.0 1971 480 2001 I Category Muding Earth Dam BanChongBa Yunan XinQiao 0.10 Homogeneous 18.0 1958 563 2000 I Category Muding Earth Dam YangPai Yunan Yao 40.00 Homogeneous 17.5 1955 100841 2000 II inner Category slope, An GanChongQing\Lon Earth Dam bottom gQuan\DaKangLang reinforced HuJiaSh Yunan Yao GuanZh 13.10 Composite Dam 39.0 1982 18700 2000 II Spillway Category re-built an An uang\GuanYinQing  HongMei Yunan Yao GuanZh 15.92 Clay Core Dam 48.8 1997 20000 2000 I Category An uang\GuanYinQing LiYuan Yunan Yao GuanZhuang 4.64 Homogeneous 20.0 1963 19000 2000 I Category An Earth Dam DaKangL Yunan Yao DaKangLang 2.18 Homogeneous 21.0 1957 12000 2000 I Category ang An Earth Dam YiHaiZi Yunan Yao LongMaQing 0.63 Homogeneous 18.0 1959 2000 I Category An Earth Dam LongMa Yunan Yao LongMaQing 0.11 Homogeneous 12.5 1990 1000 2000 I Category Qing An Earth Dam PaiShaH Yunan Yao LongMaQing 1.54 Masonry 12.0 1960 300 2000 I Category e An Gravity Arch Dam XiaoHeiB Yunan Yao LongQuan 0.46 Homogeneous 12.5 1964 1000 2000 I Category a An Earth Dam MaLiu Yunan Yuan 19.82 Clay Core Dam 55.8 1990 117677 1994 III seepage Category control Mou LongQuan\MoKe\L ongShan\JinLei\NiuJi eHe\MaoBieHe BingJian Yunan Yuan 17.84 Clay Core Dam 42.0 1982 2000 III reinforced Category Mou LongQuan\MoKe\L ongShan\JinLei\NiuJi eHe\MaoBieHe  LaoBaSh Yunan SheDian 19.80 Homogeneous 20.4 1963 3440 2003 III Category an Dayao Earth Dam County DaPoBa Yunan XiaoHongShan 0.35 Homogeneous 12.0 1969 90 Dayao Earth Dam County LengShui Yunan XiaoHongShan 0.30 Homogeneous 10.5 1969 150 Qing Dayao Earth Dam County DaYaKou Yunan XiaoHongShan 0.25 Homogeneous 15.6 1981 78 / Dayao Earth Dam County WenCha Yunan PingDi 3.60 Homogeneous 15.0 1958 300 / ngGong Dayao Earth Dam County XiaoCun Yunan XiaoHongShan 0.48 Homogeneous 12.0 1959 600 Dayao Earth Dam County HeiGa Yunan PingDi 1.58 10.3 1959 289 / YaKou Dayao County ShiBanQi Yunan PingDi 1.77 15.0 1959 150 / ng Dayao County XiaoXinJi Yunan PingDi 0.22 Homogeneous 11.2 1963 78 e Dayao Earth Dam County Yunan 12.25 Homogeneous 43.8 1996 6000 2004 I Category Yongshan Earth Dam ZaXi Yunan Weixin 0.14 Double-Arch Dam 44.0 2000 30000 2000 I Category MuLangHe Xingyi ShuangQiao 471 Concrete Double- 70.5 1999 19234 Under- / constructio Guizhou Arch Dam n  XinXiHu Xingyi FengTang 272 Concrete Core 42.1 1957 150000 1999 III Reinforced Category Guizhou Earch-fill Dam FaNi ChangErYing 122.5 Inclined clay dam 28.4 1995 900 / Guizhou Xingren HeJiaWa BaiTun 13.8 Homogeneous 16 1962 800 / n Guizhou Xingren Earth Dam TangBaC BaiTun 23.1 Homogeneous 16 1959 850 / hong Guizhou Xingren Earth Dam YangGua BaiTun 11 Homogeneous 20 1968 340 / nTian Guizhou Xingren Earth Dam QingShu ZheGuYuan 39.7 Homogeneous 29.5 1975 30000 2004 III Reinforced Category Zi Guizhou Xingren Earth Dam ShiZiTan Chong TiaoShi 1027.00 52.0 1956 30000 1995 I Category Qing Changshou Panel rock-fill dam ( Oblique wall of prevention of seepage of armored concrete ) LuoJiaQi Chong MaAnHe 5.52 Masonry Arch Dam 28.3 1979 1400 2003 I Category ao Qing Rongchang SanQiSi Chong ZhaoShiHe 13.90 Material dam of 23.6 1983 129700 2000 III Category Qing Rongchang many kinds of soil  HongMei Chong ZhaoShiHe 3.79 Homogeneous 17.0 1975 3000 2001 III Category Qing Rongchang Earth Dam LiangCha Chong XiaoJiaWan 3.70 Composite Dam 44.3 1984 25000 2000 III T Category Qing Yubei he dam renovating LouTan Chong YangShiPan 1.37 Homogeneous 15.0 1966 800 2001 I Category Qing Jiangjin Earth Dam HePing Chong YangShiPan 0.80 Homogeneous 12.6 1960 600 2002 II Reinforced Category Qing Jiangjin Earth Dam TianPing Chong YangShiPan 0.10 Homogeneous 12.0 1976 400 2002 III Reinforced Category Qing Jiangjin Earth Dam QingGan Chong SanPaoHe 0.11 Homogeneous 10.8 1971 200 2002 III Reinforced Category gLin Qing Jiangjin Earth Dam GuanYin Chong XianYu 0.15 Homogeneous 12.9 1958 300 2002 III Reinforced Category Miao Qing Jiangjin Earth Dam DaTong Chong ErXi 2.04 Homogeneous 13.3 1960 800 2001 II Reinforced Category Qing Jiangjin Earth Dam MaoGou Chong ErXi 0.19 Homogeneous 21.8 1979 600 2002 III Reinforced Category Qing Jiangjin Earth Dam MenKan Chong ErXi 0.36 Homogeneous 24.1 1957 500 2002 II Reinforced Category Tan Qing Jiangjin Earth Dam DaShan Chong ErXi 0.27 Homogeneous 10.6 1963 300 2002 III Reinforced Category Qing Jiangjin Earth Dam GaoTan Chong XianYu 0.60 Homogeneous 25.6 1978 400 2002 II Reinforced Category Qing Jiangjin Earth Dam SanCha Chong Gaozi 0.66 Homogeneous 22.4 1982 300 2002 III Reinforced Category He Qing Jiangjin Earth Dam  ZaoJiaoP Chong ZhouJiaGou 1.07 Homogeneous 35.5 1989 180000 2004 III Reinforced Category ing Qing Kaixian Earth Dam County YouPuZu Hubei ZhaiGang 16.32 Clay core Dam 18.7 1965 1500 2004 II Reinforced Category i Xishui YuJiaYan Hubei YuYanHe 34.50 Clay core Dam 18.7 1975 6400 2004 II Reinforced Category Xishui ShengJia Hubei DaoLiu 11.11 Clay core Dam 20.7 1964 1500 2004 II Reinforced Category Chong Xishui ShanDuX Hubei SanDuXia 56.40 Masonry 14.0 1964 25000 2002 III Reinforced Category ia Lichuan Gravity Arch Dam WuJinGo Hubei WuJinGou 10.20 Earth-fill Dam 24.0 1989 1200 / u Lichuan YanBaoD Hubei YanB 46.50 Clay core Dam 45.8 1971 30000 1981 III Reinforced Category i Hongan aoDi\YanDianHe ShiZiCho Hubei XiongHe 3.48 Clay core Dam 39.4 1958 10000 1989 II Reinforced Category ng Hongan YPWR_SD_DS (ENG) Changjiang/Pearl River Watershed Rehabilitation Project Guidelines for Dam Safety Central Project Implementation Offoce, Changjiang/Pearl River Watershed Rehabilitation Project 2005. 12. 14  Appendix 1 Changjiang/Pearl River Watershed Rehabilitation Project Dam Safety Review Guidelines General These guidelines have been prepared in accordance with the following documents: (i) Regulation for Dam Safety Management promulgated by the China State Council in 1991; (ii) Methods of Dam Safety Review issued by the Ministry of Water Resources in 1995; and (iii) World Bank Operational Policy OP 4.37 on Dam Safety. 1. The guidelines are applicable to the following dams or dams under construction (DUC) on which the project is directly dependent: 1-1 Dams 15 meters and above in height and also those below 15 meters in height which are included for review based on safety considerations; 1-2 Dams which have not been subject to a safety review and have not been given a safety clearance during the past 6-10 years; 1-3 Dams which were subject to a safety review during the past 6-10 years and rated as ‘third category dams1’, and which have not been strengthened and have not been given a safety clearance; 1-4 Dams 10 m and above but below 15 m in height and with storage capacity of one million cubic metes and above would be subject to the Small Dam Safety Review Guidelines as per Annex 2. 2. Organization of Safety Review 2-1 A dam safety review would be organized and presided over by the authority responsible for its adminstration. The authority concerned would appoint relevant specialists to form an expert panel for the safety review.of the dam. 2-2 An expert panel generally comprises 7-9 specialists, and should include: (i) the technical person in charge from the authority responsible for the administration of the dam; (2) the technical person in charge and relevant technical specialists from the organization responsible for the operation and maintenance of the dam; (3) relevant specialists from the organizations responsible for the design and construction of the dam; (4) relevant specialists from a research institute or institution of higher learning; (5) relevant specialists from the dam safety authority. The expert panel should include specialists in the fields of hydrology, geology, hydraulic structures, mechanical and electrical engineering, and metalwork. The qualifications of the participating experts should be reviewed and cleared by the higher level authority responsible for dam administration. 1 See Appendix 1-1. Classification Criteria for Dam Safety. 3. Report on Dam Safety Review – Review Procedure and Contents of the Report 3-1 The authority responsible for the adminsistration of the dam would prepare the terms of reference for dam safety review and the work program, and appoint the expert panel. 3-2 The organization responsible for the dam operation and maintenance should furnish the following documents and materials for the safety review: (i) report on the dam operation and maintenance; (ii) information and data pertaining to survey, investigations and design of the dam; (iii) information and data pertaining to the construction of the dam (including a list of construction materials used); (iv) records and drawings provided during handing-over of the dam for operation; (v) materials and records pertaining to yearly operation and maintenance of the dam; and (vi) materials and records pertaining to the dam safety monitoring, data compiled, analysis of the data and results. 3-3 The organization responsible for the operation and maintenance of the dam would appoint a Water Conservation design institute, research institute, or institution of higher learning to carry out an analysis and evaluation of the dam safety and prepare a report thereof. The report should cover the following aspects: 1) Review of design floods, including review of hydrological computations and and resevoir operation study for flood control; 2) Review of seismic design, including earthquake intensity and the dam resistance to earthquake shocks; 3) Analysis and evaluation of technical quality, including technical quality of the dam during construction and at present; 4) Analysis of structural and seepage stability, including deformation of the dam; 5) Analysis of dam operation conditions, including analysis of ageing of works; 6) Overall assessment of dam safety and preparartion of a report presenting the findings on dam safety; 7) Operation & maintenance program, covering organizational structure, staffing, technical experts, O&M procedures and safety inspection system (see Appendix 3: Guide for Operation and Maintenance of Dams); 8) Emergency preparedness plan, specifying the roles of responsible parties when dam failure is considered imminent, or when expected flow release threatens downstream life, property, or economic operations that depend on river flow levels. It includes the following items: clear statements of the responsibility for dam operations decision making and for the related emergency communications; maps outlining inundation levels for various emergency conditions; flood warning system and its characteristics; and procedures for evacuating threatened areas and mobilizing emergency help and support and equipment (see Appendix 4: Guidelines for Emergency Preparedness Plan) 3-4 During dam safety review, when it becomes necessary to carry out supplemental investigations and tests in order to obtain further information to facilitate study and judgment, the organization responisble for operation and maintenance should appoint competent parties to carry out the work. The latter should carry out the required investigations and study and report on the results. 3-5 The authority responsible for the administration of the dam would organize a site inspection. The expert panel and the party responisble for preparing the dam safety analysis and evaluation report should participate in the site inspection. The organization responisble for the operation and maintenance of the dam should co-operate fully in this regard. Following the site inspection, a reported entitled ‘Dam Safety Site Inspection Report’ should be prepared. 3-6 The expert panel should review and hold discussions on the above-mentioned information, materials and reports, carry out a comprehensive overall evaluation of the dam safety, and determine the rating of the dam. Where a dam is rated as as a third category dam it is necessary that the maximum storage volume and maximum water level allowable prior to dam strenthening and rectification works being carried out be specified. The safety review report should be prepared and submitted to the higher level authority responsible for dam administration for review and record. 4. The project would finance the costs for dam safety review. The contract for dam safety review shall be arranged in accordance with the Guideline for Selection and Employment of Consultants by the World Bank. There are 9 dams needed to be further reviewed. The total estimated cost of review amounts 214 thoushand RMB and will be fully covered by the budget for safeguard activities (for details see appendix 5: list of project relevant dams). For the other 3 dams rated as the third category, it will cost around 1.4 million RBM for rehabilitation by estimation, the local authority responsible for dam administration will be reported and pool fund for rehabilitation. Thus the cost will not be included in the budget of this project. 5. Where it is necessary to carry out dam strengthening and rectification work following a dam safety review, the works should be funded by the government level responsible for the dam in which the dam is located. The government concerned would use funds from the following sources for this purpose: (a) Basic Construction Fund included in the budget of Finance Bureau (including special funds); (b) Water Conservancy Construction Fund, used for the construction of water conservancy works, obtained from the following two sources: • Local government funds (from fees collection); • Various funds levied for the construction of flood control works as approved by provicial government (fund, fees collection), consolidated as local water conservancy construction fund.. (c) Loan from domestic banks and non-bank financial institutions; (d) Funds raised by the issue of governmental bond with approved of the national government; (e) Funds raised from foreign governments or international financial institutions; (f) Other funds as approved for the construction of water conservancy projects (such as Food for Work Fund, Agricultural Development Fund, etc)  Appendix 1-1 Changjiang/Pearl River Watershed Rehabilitation Project Classification Criteria for Dam Safety First Category: Actual capacity to withstand design flood meets the standard and regulation as specified by the Ministry of Water Resources; the operation condition of dam is normal; no major technical problems exist and operation of the dam according to design is possible. Second Category: Actual capacity to withstand a flood magnitude is not less than that requried for the flood magnitude specified by the Ministry of Water Resources, defined as the recent period extraordinary flood adopted for dams undergoing strengthening and rectifcation works; the operation condition of dam is normal; no major technical problems exist and operation of the dam according to design is possible. Third Category: Actual capacity to withstand a flood magnitude is less than that required for the flood magniture specified by the Ministry of Water Resources, defined as the recent period extraordinary flood adopted for dams undergoing strengthening and rectifcation works; or there exist serious technical problems that will affect the dam safety and normal operation of the dam is not possible.  Appendix 2 Changjiang/Pearl River Watershed Rehabilitation Project Small Dams Safety Review Guidelines 1. Dams Subject to Review 1.6 These guidelines are applicable to those dams or dams under construction (DUC) on which the project is directly dependent: as defined in 1.2 below. The guidelines do not conflict with dam safety review requirements prescribed by the Ministry of Water Resources of China; 1.7 Dams which are 10 meters and above but are below 15 meters in height and with storage capacity of one million cubic meters and above are defined as small dams subject to these guidelines; 1.8 Dams as defined in 1.2 above which have not been subject to a safety review and have not been given a safety clearance during the past 6-10 years shall be subject to safety review; 1.9 Dams as defined in 1.2 above which were subject to a safety review during the past 6-10 years and rated as ‘third category dams2’ and which have not been strengthened and have not been given a safety clearance shall be subject to safety review; 1.10 Irrigation sub-projects served by existing dams can be included for implementation in the annual work plan only if such dams have been subject to the safety review procedures and rated as ‘first category dams’ or ‘second category dams’. 2. Organization of Safety Review 2.1 A dam safety review would be organized and presided over by the county Water Conservancy Bureau (WCB) concerned. The WCB would appoint an expert panel for the safety review.of the dam. 2.2 An expert panel would generally comprise 7-9 specialists and should include: (i) the technical person in charge from the authority responsible for the administration of the dam; (ii) the technical person in charge and relevant technical specialists from the organization responsible for the operation and maintenance of the dam; (iii) relevant specialists from the organizations responsible for the design and construction of the dam; (iv) relevant specialists from a research institute or institution of higher learning; (v) relevant specialists from the dam safety authority. 2.3 The expert panel should include specialists in the fields of hydrology, geology, hydraulic structures, mechanical and electrical engineering, and metalwork. 2 See Appendix 2-1: Classification Criteria for Dam Safety. 3. Review Procedure 3.1 Every dam shall be separately reviewed; 3.2 The basic procedure would be in accordance with the method of safety ranking, principally to understand the current status of a dam in respect of its relative safety so as to determine the extent of hazardousness. 3.3 Data collection The county WCB concerned would provide the following information and data: (a) Relevant engineering design reports/general engineering information and data (e.g., location, catchment area, dam height, total reservoir storage capacity, downstream population and irrigated area, etc.); (b) Materials of the original dam design, geological investigations, engineering survey; The organization/unit responsible for the operation and maintenance of the dam would provide the following information and data: (a) Construction records (including records of dam strengthening) and drawings (as-built drawings included); (b) Materials relating to operation and maintenance of the dam and reservoir, including changes which occurred during operation (observational data included), hazardous and abnormal situations that have taken place, water levels and flood discharges (including maximum water level and year of occurrence). 3.4 Supplemental Data Collection. The panel of experts should review the adequacy and quality of the materials, information and data collected. In the event that these are not sufficient for the purpose of assessing the stability and safety of the dam, they should prescribe the requisite hydrological, geotechnical and engineering survey data to be collected for study and analysis. Supplemental data required should be provided by the county WCB concerned. 3.5 Field inspection. The panel of experts would carry out field inspection. The areas to be inspected are: (a) Dam: year of construction; structure quality; seepage condition and trend; dam stability during operation; (b) Spillway: year of construction; structure quality; structural stability; (c) Outlet works: structure quality; operational conditions; structural stability; (d) Metal works. period in service; operational conditions of lifting mechanism; conditions of gates; (e) Dam monitoring facilities: operational conditions. 3.6 Safety evaluation and determination (b) Scoring of safety ranking would be carried out during field inspection. Following field inspection and interviews, reconnaissance, notes and video records, review of information land data, members of the panel would evaluate and fill out the hazardous  score sheet and provide their evaluation of the safety of the dam accordingly; (c) The score would be computed according to the following formula: g SR= (SR)i i=1 where (SR)i is the value scored for the i-th hazardous factor. Each hazardous factor is graded at three levels of hazardousness: low, medium and high. Each level is assigned numerical values starting from low to high. The extent of hazardousness of a dam is made up of several hazardous factors as shown in the following tables:  Table 1: Hazardous Factors and Assigned Values for Dam Hazardous Age of dam (Number of years) Structure quality factor 15 -29 5 -14 30 4 very poor Poor Average Good Hazard value 6Ã 3 1 0Ã 10 6 2 0 Hazardous Seepage pattern Structural stability factor increasing; increasing; stable; stable; settlement settlement settlement function- seepage at seepage at seepage seepage and but and ing Hazard high level low level at high at low slip-circle has cracks normal value level level failure stabilized 16 10 4 0 20 10 5 0 Table 2: Hazardous Factors and Assigned Values for Spillway Hazardous Age of spillway (number of years) Structure quality factor 10 -19 Hazard 20 5 -9 4 very poor poor Average Good value 6 3 1 0 10 6 2 0 Hazardous Structural stability factor bank slope unstable bank slope stable bank slope stable Hazard and and and value conditions of base slab poor conditions of base slab poor conditions of base slab good 15 5 0 Table 3: Hazardous Factors and Assigned Values for Outlet Works Hazardous Structure quality Operational condition factor very cracks and cracks and scouring and no cracks and Hazard poor Average Good poor scouring no scouring no cracks no scouring value 12 8 2 0 10 6 2 0 Hazardous Structural stability factor Hazard Unsatisfactory satisfactory value 10 0 Table 4: Hazardous Factors and Assigned Values for Metal Works Hazardous Period in service (number of Operational condition of lifting mechanism factor years)  operation operation malfunctioning fair; normal; Hazard 20 10 -19 5 -9 4 of lifting electricity Good maintenance value mechanism supply poor irregular 6 3 1 0 12 8 4 0 Hazardous Condition of gate factor rusting badly and gate get stuck rusting and leaking due to Hazard Good easily. faulty water stop value 10 5 0 (c) Safety evaluation. The SR scores by individual panel members would be computed. The average of these scores would be the basis used for evaluating and determining the safety of the dam. An average SR score of 42 and above indicates the dam is highly hazardous. (d) Review findings. Using the SR score as the basis, the panel of experts would take into account other factors not included in the above assessment and make an overall evaluation and findings of the safety of the dam, determine its category, and prepare a dam safety review report, to be reviewed and kept by the higher level authority responsible for the administration of the dam. There are 1 dam needed to be further reviewed. The total estimated cost of review amounts 12 thoushand RMB and will be fully covered by the budget for safeguard activities according to the Feasibility Study report (for details see list of appendix 5:list of project relevant dams).  Appendix 2-1 Changjiang/Pearl River Watershed Rehabilitation Project Small Dam Safety Review Guidelines Classification Criteria for Dam Safety First Category: Actual capacity to withstand design flood meets the standard and regulation as specified by the Ministry of Water Resources; the operation condition of dam is normal; no major technical problems exist and operation of the dam according to design is possible. Second Category: Actual capacity to withstand a flood magnitude is not less than that requried for the flood magnitude specified by the Ministry of Water Resources, defined as the recent period extraordinary flood adopted for dams undergoing strengthening and rectifcation works; the operation condition of dam is normal; no major technical problems exist and operation of the dam according to design is possible. Third Category: Actual capacity to withstand a flood magnitude is less than that required for the flood magniture specified by the Ministry of Water Resources, defined as the recent period extraordinary flood adopted for dams undergoing strengthening and rectifcation works; or there exist serious technical problems that will affect the dam safety and normal operation of the dam is not possible.  Appendix 3 Changjiang/Pearl River Watershed Rehabilitation Project Guide for Operation and Maintenance of Dams VI. Organizations Responsible for Operation and Maintenance of Dams These are existing organizations responsible for the operation and maintenance of dams on which the project is directly dependent:, including county Water Conservancy Bureaus, Reservoir Management Bureaus, Township/Town Water Conservancy Stations. VII. Main Facilities for Operation and Maintenance of Dams The facilities to be provided for operation and maintenance should be appropriate to meet practicable needs consistent with economy. Existing facilities should be made full use of, supplemented by the acquisition of other necessary items. 1. Instrumentation for monitoring water level and rainfall Four water level stations should be established and equipped with staff gauges: one in front of the dam, one at the irrigation intake channel, and one each at upstream and downstream of the flood gate. A float-type water level recorder should be installed in the reservoir. In addition, one to three automatic rainfall recorders equipped with remote sensing device should be installed at the dam and in the reservoir area. In accordance with current requirements, dams must be included in the province-wide flood control network, and subject to unified reservoirs operation procedures during flood times. As such, an adequate set of automated water level and rainfall measurement equipment must be installed with the necessary authomated monitoring device. 2. Instrumentation for monitoring hydraulic structures The structures to be monitored include principally dams, spillways, irrigation canals. The instrutmentation and equipment required are as follows: (4) Settlement observation stations; (5) Ground level bench mark stations; (6) One set of high-precision theodolite and one set of high-precision level; (5) Steel-string type pore-pressure measuring instrument a/ or standpipe piezometers installed in the dam body and foundation; (6) Monitoring devices (various equipment such as MCU b/, ADAS c/, etc) _________________________________________________________________________ a/ Instrument used to measure seepage pressure in the dam. The membrane of the sensor head is acted upon by the pore-pressure, which is converted into frequency of vibration to be transmitted. b/ Data receiving system for monitoring equipment c/ Water level measuring instrument.  3. Space for monitoring activities Housing and office space for monitoring activities should be provided according to the need for reservoir operation and management. 4. Transport facilities During floods vehicles, boats, etc. should be made available for emergency and rescue operations according to the dam location and operational requirements 5. Communication facilities As telephone exchange facilities are susceptible to breakdown during floods (e.g., telephone lines may be destroyed by floods) resulting in communication disruptions, one transmitter- receiver set and one mobile telephone should be additionally provided for flood emergency operation work. VIII. Dam Operation and Maintenance Procedures Operation of dams should be based on hydrological forecast and to the extent possible operation for power generation should be combined with irrigation release. For dams with year-to- year carry-over storage, storing of water in the reservoir should be optimized provided flood control requirements are satisfied as a pre-condition.. All structures should be regularly inspected, maintained, and repaired. The operation, inspection, maintenance and repair of these structures and facilities should be carried out strictly in accordance with technical regulations and specifications. In particular, observation and monitoring of the dam, spillway, and other important structures should conform to the technical requirements and data collected should be compiled and analyzed in a timely manner. When problems are encountered, the cause(s) should be identified and remedial measures taken in a timely manner. Sudden draw-down of water level in the reservoir should be strictly controlled to prevent slip circle failures. For dams with hydropower function, power generation and irrigation release should be combined. Therefore, in addition to complying with relevant regulations of maintenance and management for hydropower generation, reservoir operation rules should be unified to satisfy irrigation requirements, to avoid the situation that the dam serves hydropower benefit at the expense of irrigation objective. A duty shift system with proper accountability for work done should be established. Personnel on duty should make entry of events and activities occurring during the shift and a record of these entries should be maintained. In summary, effective procedures, rules and regulations should be established for the operation of dams. Optimum reservoir operation procedures under various situations should be established to maximize irrigation, power generation, flood control and aqua-culture benefits. Such procedures should take into considerations the requirements of the departments involved, forecast of rainfall situations in the reservoir area and overall requirement for flood control, as well as both short term and long term objectives. In particular, reservoir operation during flood times should strictly conform to the operational plan and operation regulation approved by the upper-level government authority, in compliance with reservoir operation requirements of the higher level authority responsible for flood control, and taking into account rainfall and water levels forecast, to ensure safe operation of the facilities. IX. Operation and Maintenance of Monitoring System  The successful installation of dam safety monitoring system is merely the beginning of putting the system into operation. Its normal operation depends to a large extent on the maintenance of the system so that it can serve the purpose of dam safety monitoring. 1. Management of the system (1) Define responsibility: County Water Conservancy and Hydro-electric Bureau should be directly responsible for the day-to-day operation and maintenance of the system. (2) Establish full-time dam safety monitoring groups: monitoring groups should have the full complement of staff, including not only operators of monitoring equipment, but also persons responsible for operation and maintenance of the computer system and data checking and analysis. (3) Establish regular reporting system: monitoring groups should submit quarterly reports to county Water Conservancy and Hydroelectric Bureaus on the operation of the dam safety system. Quarterly reports should comprise two parts: (i) the performance of the dam based on the information and data obtained in the monitoring process and (ii) the operational conditions of the monitoring system so that county Water Conservancy and Hydroelectric Bureaus are informed of their status in a timely manner. (4) Strengthen the accountability of the monitoring groups: data collected should be checked by the persons responsible. Where there appears to be abnormality, the data should be double-checked; and if the data is found to be abnormal, the cause for this should be studied immediately and the automatic measuring equipment checked if its functioning is normal or otherwise. If the erroneous data found cannot be corrected or eliminated, this should be recorded, and a report lodged immediately to the superior officer. (5) Strengthen the recording and management of monitoring system operation: there should be a record of observations for all system operations. Proper data collection, compilation and analysis should be carried out. Where data abnormality occurs, a detailed record of the faulty equipment part, extent of faultiness, and results of rectification action should be made. Such records should be compiled at regular intervals. (6) Strengthen data collation, analysis and compilation. Apart from day-to-day collation and quarterly summary, annual data compilation should be carried out and completed at year end or the beginning of the coming year. And a monitoring system operation annual report should be prepared and submitted to the authority in charge. 2. System maintenance (5) Necessity for system maintenance: an automated monitoring system is an integrated system composed of various electronic parts and components and electric circuits. Damage of any of these will affect the operation of the whole system. As deterioration of electronic device is inevitable, the system cannot function well without proper maintenance. (6) Arrangement of maintenance fund: maintenance fund should be allocated as a separate item in the annual budget of county Water Conservancy and Hydroelectric Bureaus. The fund must not be used for other purposes. Spare parts should be provided as appropriate. Since the automated monitoring system serves directly dam safety purpose, system maintenance can be included as an item in the annual budget for dam  repair and maintenance. The annual provision should be about 1% of the capital investment in the automated system. (7) Training of maintenance personnel: during installation of the system, experts from the supplier should provide training. Training should cover the maintenance of instruments, computer, communication equipment, and the system and dam safety aspects, etc. (8) Strengthen relationships with relevant organizations: request these organizations to carry out regular maintenance (every year or every two years). Also request relevant organizations to assist in resolving major technical problems in a timely manner. X. Dam Safety Inspection (2) County Hydroelectric Bureaus should maintain annual or semi-annual regular dam supervision and site inspection during flood times. (3) Areas of supervision: (i) dam safety situations and operational conditions of the monitoring system; (ii) conditions of principal facilities for dam operation and maintenance; (iii) compliance with maintenance and monitoring procedures and the duty shift system and maintenance of shift record; (iv) preparedness for operation and provision of man power and materials during flood emergencies; (v) status of follow-up actions (including maintenance) and rectification of problems since the last dam inspection; (vi) use of funds and financial management; (4) Supervision method: briefings, site inspection, review of data and records. XI. Provision of operation fund It is necessary to have adequate funding support for proper operation and management of the facilities. As such provision of fund to meet operation and management expenditure is very important. Major items of expenditure include: (6) Salaries, insurance and welfare funds for O & M staff; (7) Maintenance and repair; (8) Materials used in maintenance and repair; (9) Energy; (10) Other costs. The funds required for operation and management should be rationalized according to the magnitude of the tasks involved and obtained from various sources: (i) Where a dam has a flood control function, the requirement should be partly met by the flood control fund (provided by finance bureau); (ii) Where a dam is operated for irrigation, the requirement should be partly met by part of the water charge collected based on the amount of water allocated for irrigation (irrigated area); (iii) Where a dam is operated for hydro-power and aquaculture benefits, the requirement should be partly met from the income derived from electricity and aquaculture; (iv) Except for major repair cost, for which fund should be consolidated from annual provisions for periodic spending on maintenance and repair, all other items of expenditure should be met from the current year budget.  Appendix 4 Changjiang/Pearl River Watershed Rehabilitation Project Guidelines for Emergency Preparedness Plan Background 1. Changjiang/Pearl River Watershed Rehabilitation Project includes 37 project counties. While the dams constructed under the project will be small (less than 10 meters in height), there are other existing dams or dams under construction (DUC) that on which the project is directly dependent The safety of these dam directly affect the safety of human lives and property downstream of these structures. It is therefore very essential that, in addition to dam safety review, an emergency preparedness plan is prepared for each dam. . Preparation of Flood Risk Maps 2. Flood maps should be available showing the probable extent of area subject to flood disaster based on the present flood protection standard, actual capacity of flood protection, and records of flooding. Flood risk analysis should also be carried out. 3. A flood risk map is prepared using composite information on geography, social and economic conditions and flood characteristics, and through research into the information collected, flood computations and processing and compilation of the results obtained. It is a visual presentation of the probable extent and depth of inundation for a certain area due to flood, whereby it is possible to know in advance and analyze and with this as a basis it is possible to analyze and predict the probable risks and dangers resulting from floods of different magnitudes. Using flood frequency analysis and information obtained from investigations into historical flood events, the flood frequency-flood water level profiles are estimated. The extent of area that will be inundated is then drawn on a map with the corresponding flood frequency and depths of flooding at significant places shown. 4. Two situations should be considered when preparing a flood risk map. One situation is that the dam does not meet the flood control standard and has serious deficiency problems, which affect the dam safety and may cause a dam failure. In such a situation, the flood risk map should be prepared based on a dam break analysis due to the occurrence of the design flood. The other situation is that the dam meets the flood control standard and existing deficiency problems would not significantly affect the dam safety. For this situation, the flood risk map should be prepared based on a dam break analysis due to the occurrence of the checking flood. For either situation, the downstream flood inflow into the affected area with the same frequency of occurrence as the inflow into the reservoir should be taken into account when drawing the extent of flooding and showing the flood depths on the flood risk map. Operational Strategies for Safety of Dam and Downstream Lives and Property 5. Identification of key protection targets. Survey and investigation of the basic conditions on both banks of the rivers downstream of the dam should be carried out. Key points for flood project should be determined by identifying areas which are susceptible to flood threats. Flood water level profiles at these points should be estimated. 6. Operational strategy to deal with floods equal or less than design flood magnitude. In the mountainous regions rainstorms occur with high intensities, flood peaks are high, and flood levels rise rapidly and also recede rapidly. In view of this and the characteristics of typical floods of different frequencies of occurrence, and also the fact that most storage dams in the project area serve mainly irrigation purpose and only additionally for flood control, in general the flood control effect of these storages is not significant. Reservoir operation procedure during floods should therefore be in accord with the functions of the storage dam, and the principle of reservoir operation is to see it that, subject to the prerequisite of dam safety, flood discharge from the reservoir is less than flood inflow into the reservoir in order to avoid releasing large quantity of water from the reservoir due to error of judgment. For dams not meeting the designed flood standards as stipulated by the state and also having serious deficiency problems which will affect the dam safety, measures should be taken to ensure their safety to avoid a dam failure. 7. In general, where dams are in relatively good shape, and where forecasting capability exists, reservoir operation should be subject to the unified operation direction of the flood control authority. Subject to the prerequisites that dam safety is assured and that irrigation and hydro- power interests are safeguarded, and provided that reliable hydro-meteorological forecasts are available, the procedure for pre-emptying the reservoir for flood storage may be adopted with the aid of the forecasting capability. That is to say, at the start of a rainstorm and before the arrival of the flood peak, water is released in advance from the reservoir to increase its flood storage capacity so as to reduce the magnitude of peak spillway discharge, to delay as much as possible the release of peak spillway discharge in order to reduce at key flood protection points the magnitude of flood peaks, and also to separate the arrival of the flood peak due to reservoir discharge and that due to inflow of flood downstream of the dam. 8. For dams basically meeting the designed flood standards as stipulated by the state and also having some deficiency problems, the storage level in the reservoir should be controlled or other measures taken during flood periods. 9. Operational strategy to deal with floods exceeding design flood magnitude. The basic principles to observe are: to give full effect of the system of administrative head taking responsibility; to rely principally on flood control facilities and combine this with flood rescue operations; to have an overall strategy while ensuring key protection points are secured; to put overall, majority interests above others and to unite all parties to combat floods; to have unified flood control direction and unified procedures for reservoirs operation; to combine engineering and non-engineering measures; and to mobilize all positive elements of the society to the extent possible. To deal with floods exceeding design flood magnitude, the following tasks should be properly carried out: (i) Improved heavy rain and flood forecast and warning. Existing meteorological and hydrological forecast systems and existing automated reservoir-based hydrologic monitoring and reporting systems should be fully made use of to improve on the forecasting and reporting of floods exceeding design flood magnitude. The length of lag time between the forecast made and the arrival of the flood is crucial in dealing with floods exceeding design flood magnitude. Once a flood warning is received, the flood control authority should immediately study how to deal with the situation, set out the measures to be taken, and direct unified operations. (ii) Strict flood control supervision. Establish a responsibility system to accountable for the completing of the form of certification of flood control safety inspection. (iii) Strengthening reservoir, river and dyke protection management and preparing operation plans for flood periods. Organizations responsible for reservoir management should comply with the Flood Control Regulations of the People’s Republic of China and Regulations on Management of Reservoirs and Dams Safety. To strengthen the management of dam safety, there should be staff designated to regularly carry out dam safety monitoring and inspection, analyze information and data collected in a timely manner, and at all times be fully aware of the performance and behavior of the dams. When an abnormal phenomenon or unsafe element has been discovered, a report should be lodged immediately with the superior authority and the flood control authority for timely measures to be taken. (iv) Establishing and improving computerized flood control network systems to ensure smooth and rapid transmission of meteorological forecast, rainfall and water level information, information on storage dams and flood warning. The speed with which flood information is transmitted is very important for the protection of human lives and reduction of damage to property. In order to better deal with floods exceeding design flood magnitude and to reduce to the extent of damage, the establishment and improvement of regional hydrological forecasting and reporting systems should be accelerated. For important large and medium-sized reservoirs, hydrological monitoring and reporting systems should be established and improved progressively. Experience gained should be summarized continuously. Meteorological quantitative forecast of heavy rain should be combined with hydrological forecast of flood peaks so that flood warning can be issued as early as possible, especially in the case of floods exceeding design flood magnitude the lead time of flood warning ahead of the flood arrival should be increased as much as possible. 10. Flood warning. Trouble-free transmission of flood warning minimizes loss of lives and damage to property. Where there are likely zones of inundation along the transmission route, a prior warning system should be established. Liaison and communication between reservoirs and the flood control department should be strengthened. Before the onset of the flood season, all communication facilities and equipment should be checked, tested and serviced to forestall communication breakdowns during the flood. Flood warning signals should be standardized and made known to all. Besides issuing flood warnings through TV and radio, in day time a yellow flag may be raised and a warning shot fired and during the night a fire may be lit and a warning shot fired. 11. Evacuation. Once water in a reservoir reaches a high level, and there is a need to increase spillway discharge, residents downstream of the dam should be notified, especially those living in low-lying areas to ensure that they are moved safety to higher ground, and damage to property is minimized. Evacuation of residents downstream of a dam should be organized by the local flood control command headquarters. The personnel responsible for directing evacuation operations, the order and procedure of evacuation, the routes to be followed during an evacuation, and the places to which the evacuees are to be moved, etc. must be pre-determined in advance. All these should be documented and publicized. 12. Once a danger situation arises, the local flood-control command headquarters should mobilize emergency man-power such as the army and others and facilities through the provincial flood-control command system to assist in rescue work. 13. Increase of financial provision for flood control. Flood control funds should be established and flood insurance taken out. The provision for flood control should be included in the local fiscal budget in accordance with the Flood Control Regulations of the People’s Republic of China. This is the best economic guarantee of protection against floods exceeding design flood magnitude.  Appendix 5 Changjiang/Pearl River Watershed Rehabilitation Project List of Project Dams Name. Province County Subwatershed Total Dam type Height Time of Downstream Recent dam saftey Actions dam needs Reservoir Related Capacity completion Populaton review( taken to further (10^ treat the review/streng m thening dam 6 m3 Time Result LongQin Yunan HeJieChong 0.22 Homogeneous 21.5 1982 900 1999 I Category gBa Muding Earth Dam DaZa Yunan HeJieChong 0.01 Homogeneous 11.6 1955 200 2001 I Category Muding Earth Dam YangBei Yunan HeJieChong 0.01 Homogeneous 11.0 1973 80 2001 I Category LongJingBa Muding Earth Dam ChaHeZha Yunan PaiFang 0.40 Homogeneous 18.3 1962 2500 2000 II Category Muding Earth Dam JinLongZha Yunan PaiFang 0.26 Homogeneous 18.1 2000 1500 2001 I Category Muding Earth Dam WangLong Yunan PaiFang 0.12 Homogeneous 15.0 1992 120 2000 I Category JingBa Muding Earth Dam BaiJieCh Yunan MiCun 0.10 Homogeneous 18.0 1959 650 2001 II Category ong Muding Earth Dam HuaYuan Yunan MiCun 0.16 Homogeneous 22.0 1976 2000 2001 I Category Muding Earth Dam  QingLongZha Yunan MiCun 0.24 Homogeneous 23.0 1987 2000 2001 I Category Muding Earth Dam YuanFengZh Yunan PuCun 0.10 Homogeneous 17.0 1960 1050 2001 II Category a Muding Earth Dam LeSheZha Yunan FengLe 0.30 Homogeneous 16.0 1986 1200 2001 I Category Muding Earth Dam LongWangZh Yunan FengLe 0.12 Homogeneous 18.0 1973 810 2001 I Category a Muding Earth Dam XiaoJiuLong Yunan GaoPing 0.60 Homogeneous 28.0 1960 2100 2001 I Category Muding Earth Dam XinCun Yunan BeiTing 0.15 Homogeneous 12.0 1958 1950 2000 I Category Muding Earth Dam ZhaoDaBa Yunan XinQiao 0.21 Homogeneous 16.0 1958 1846 2001 I Category Muding Earth Dam WeiXing Yunan XinQiao 0.24 Homogeneous 12.0 1971 480 2001 I Category Muding Earth Dam BanChongBa Yunan XinQiao 0.10 Homogeneous 18.0 1958 563 2000 I Category Muding Earth Dam YangPai Yunan Yao 40.00 Homogeneous 17.5 1955 100841 2000 II inner Category slope, An GanChongQing\Lon Earth Dam bottom gQuan\DaKangLang reinforced HuJiaSh Yunan Yao GuanZh 13.10 Composite Dam 39.0 1982 18700 2000 II Spillway Category re-built an An uang\GuanYinQing HongMei Yunan Yao GuanZh 15.92 Clay Core Dam 48.8 1997 20000 2000 I Category An uang\GuanYinQing  LiYuan Yunan Yao GuanZhuang 4.64 Homogeneous 20.0 1963 19000 2000 I Category An Earth Dam DaKangL Yunan Yao DaKangLang 2.18 Homogeneous 21.0 1957 12000 2000 I Category ang An Earth Dam YiHaiZi Yunan Yao LongMaQing 0.63 Homogeneous 18.0 1959 2000 I Category An Earth Dam LongMa Yunan Yao LongMaQing 0.11 Homogeneous 12.5 1990 1000 2000 I Category Qing An Earth Dam PaiShaH Yunan Yao LongMaQing 1.54 Masonry 12.0 1960 300 2000 I Category e An Gravity Arch Dam XiaoHeiB Yunan Yao LongQuan 0.46 Homogeneous 12.5 1964 1000 2000 I Category a An Earth Dam MaLiu Yunan Yuan 19.82 Clay Core Dam 55.8 1990 117677 1994 III seepage Category control Mou LongQuan\MoKe\L ongShan\JinLei\NiuJi eHe\MaoBieHe BingJian Yunan Yuan 17.84 Clay Core Dam 42.0 1982 2000 III reinforced Category Mou LongQuan\MoKe\L ongShan\JinLei\NiuJi eHe\MaoBieHe LaoBaSh Yunan SheDian 19.80 Homogeneous 20.4 1963 3440 2003 III Further Category strengthenin an Dayao Earth Dam g/dam County  DaPoBa Yunan XiaoHongShan 0.35 Homogeneous 12.0 1969 90 Dayao Earth Dam County LengShui Yunan XiaoHongShan 0.30 Homogeneous 10.5 1969 150 Qing Dayao Earth Dam County DaYaKou Yunan XiaoHongShan 0.25 Homogeneous 15.6 1981 78 further review/dam Dayao Earth Dam County WenCha Yunan PingDi 3.60 Homogeneous 15.0 1958 300 further review/dam ngGong Dayao Earth Dam County XiaoCun Yunan XiaoHongShan 0.48 Homogeneous 12.0 1959 600 Dayao Earth Dam County HeiGa Yunan PingDi 1.58 10.3 1959 289 further review/small YaKou Dayao dam County ShiBanQi Yunan PingDi 1.77 15.0 1959 150 further review/dam ng Dayao County XiaoXinJi Yunan PingDi 0.22 Homogeneous 11.2 1963 78 e Dayao Earth Dam County Yunan 12.25 Homogeneous 43.8 1996 6000 2004 I Category Yongshan Earth Dam ZaXi Yunan Weixin 0.14 Double-Arch Dam 44.0 2000 30000 2000 I Category MuLangHe Xingyi ShuangQiao 471 Concrete Double- 70.5 1999 19234 Under- further constructio review/dam Guizhou Arch Dam n XinXiHu Xingyi FengTang 272 Concrete Core 42.1 1957 150000 1999 III Reinforced Category Guizhou Earch-fill Dam  FaNi ChangErYing 122.5 Inclined clay dam 28.4 1995 900 further review/dam Guizhou Xingren HeJiaWa BaiTun 13.8 Homogeneous 16 1962 800 further review/dam n Guizhou Xingren Earth Dam TangBaC BaiTun 23.1 Homogeneous 16 1959 850 further review/dam hong Guizhou Xingren Earth Dam YangGua BaiTun 11 Homogeneous 20 1968 340 further review/dam nTian Guizhou Xingren Earth Dam QingShu ZheGuYuan 39.7 Homogeneous 29.5 1975 30000 2004 III Reinforced Category Zi Guizhou Xingren Earth Dam ShiZiTan Chong TiaoShi 1027.00 52.0 1956 30000 1995 I Category Qing Changshou Panel rock-fill dam ( Oblique wall of prevention of seepage of armored concrete ) LuoJiaQi Chong MaAnHe 5.52 Masonry Arch Dam 28.3 1979 1400 2003 I Category ao Qing Rongchang SanQiSi Chong ZhaoShiHe 13.90 Material dam of 23.6 1983 129700 2000 III Further Category strengthenin Qing Rongchang many kinds of soil g/dam HongMei Chong ZhaoShiHe 3.79 Homogeneous 17.0 1975 3000 2001 III Further Category strengthenin Qing Rongchang Earth Dam g/dam LiangCha Chong XiaoJiaWan 3.70 Composite Dam 44.3 1984 25000 2000 III T Category Qing Yubei he dam renovating  LouTan Chong YangShiPan 1.37 Homogeneous 15.0 1966 800 2001 I Category Qing Jiangjin Earth Dam HePing Chong YangShiPan 0.80 Homogeneous 12.6 1960 600 2002 II Reinforced Category Qing Jiangjin Earth Dam TianPing Chong YangShiPan 0.10 Homogeneous 12.0 1976 400 2002 III Reinforced Category Qing Jiangjin Earth Dam QingGan Chong SanPaoHe 0.11 Homogeneous 10.8 1971 200 2002 III Reinforced Category gLin Qing Jiangjin Earth Dam GuanYin Chong XianYu 0.15 Homogeneous 12.9 1958 300 2002 III Reinforced Category Miao Qing Jiangjin Earth Dam DaTong Chong ErXi 2.04 Homogeneous 13.3 1960 800 2001 II Reinforced Category Qing Jiangjin Earth Dam MaoGou Chong ErXi 0.19 Homogeneous 21.8 1979 600 2002 III Reinforced Category Qing Jiangjin Earth Dam MenKan Chong ErXi 0.36 Homogeneous 24.1 1957 500 2002 II Reinforced Category Tan Qing Jiangjin Earth Dam DaShan Chong ErXi 0.27 Homogeneous 10.6 1963 300 2002 III Reinforced Category Qing Jiangjin Earth Dam GaoTan Chong XianYu 0.60 Homogeneous 25.6 1978 400 2002 II Reinforced Category Qing Jiangjin Earth Dam SanCha Chong Gaozi 0.66 Homogeneous 22.4 1982 300 2002 III Reinforced Category He Qing Jiangjin Earth Dam ZaoJiaoP Chong ZhouJiaGou 1.07 Homogeneous 35.5 1989 180000 2004 III Reinforced Category ing Qing Kaixian Earth Dam County YouPuZu Hubei ZhaiGang 16.32 Clay core Dam 18.7 1965 1500 2004 II Reinforced Category i Xishui  YuJiaYan Hubei YuYanHe 34.50 Clay core Dam 18.7 1975 6400 2004 II Reinforced Category Xishui ShengJia Hubei DaoLiu 11.11 Clay core Dam 20.7 1964 1500 2004 II Reinforced Category Chong Xishui ShanDuX Hubei SanDuXia 56.40 Masonry 14.0 1964 25000 2002 III Reinforced Category ia Lichuan Gravity Arch Dam WuJinGo Hubei WuJinGou 10.20 Earth-fill Dam 24.0 1989 1200 further review/dam u Lichuan YanBaoD Hubei YanB 46.50 Clay core Dam 45.8 1971 30000 1981 III Reinforced Category i Hongan aoDi\YanDianHe ShiZiCho Hubei XiongHe 3.48 Clay core Dam 39.4 1958 10000 1989 II Reinforced Category ng Hongan