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REPUBLIC OF BOTSWANA
ANNUAL REPORT
OFTHE
GEOLOGICAL SURVEY DEPARTMENT
FOR THE YEAR
1974
PRICE: SO cents
Printed by the Government Printer, Gaborone) Botswana 1 GENERAL
1.1 Introduction The Geological Survey Department falls within the Ministry of Mineral Resources and Water Affairs. The department's headquarters are situated in Lobatse in southeastern Botswana, 76 km south of the capital, Gaborone. The fundamental aim of the Geological Survey is to assess both the mineral and the water potential of Botswana and to establish an inventory of the rock, mineral and underground water resources of the country. Therefore, it is necessary to study the rocks and geological structures of the whole country. Thus, regional geological mapping, and the publication of maps and reports describing the geology of Botswana, are a prime function of the Geological Survey. Some mineral survey and prospecting is conducted using geological, geophysical and laboratory techniques. The Geological Survey is responsible for the supervision of private sector prospecting activities in the search for economic minerals. Assistance is given to prospecting organisations and, wherever possible, interest in Botswana's mineral resources is stimulated. Development of underground water supplies and hydrogeological research is another major responsibility of the Geological Survey. Siting of water boreholes, chiefly by geophysical investigations, is followed by drilling on selected sites to the stage where productive boreholes can be passed to the Department of Water Affairs for equipping and maintenance. Borehole drilling is carried out by the Drilling Branch section of the Geological Survey, which has its headquarters in Gaborone. This is under the control of a Drilling Superintendent who is directly responsible to the Director of Geological Survey. Hydrogeological research continues to contribute to present knowledge of the nature and occurrence of underground water resources in Botswana. Besides these main activities, the Geological Survey undertakes investigations where geological advice is needed, and assists other Government Departments. The main costs of running the Geological Survey Department during 1974 were again borne by the recurrent budget. Mineral Exploration, Underground Water Development and Underground Water Research, were financed as Development Projects by United Kingdom Development Loans. The Driller Training Scheme was funded under a Swedish Development Grant.
1. 1.2 Summary of Year's work Dr. J. V. Hepworth continued as Director of Geological Survey until leaving at the termination of his secondment from British Government Service in November. Dr. R. D. Walshaw acted as Director to the year's end. The general supervision of the Department's work included the implementation of various important projects which had been planned in previous years. Much of the Director's time was devoted to direct supervision of the economic geology section, and in discussions with representatives of the private sector who were seeking Special Prospecting Licences, especially for diamonds, base metals and coal. Major concessions for coal (to British Petroleum, Shell and Anglo American) were signed in March. Supervision of the private sector prospecting activity continued to be an important part of the Survey's work and it became necessary to assign one geologist, on a part-time basis, to supervision and correlation of coal concession activities. During 1974 comparatively little regional mapping was achieved, owing to shortage of staff. This was due to termination of contracts and delays in overseas recruitment prior to the commencement of the field season, as well as a change of demand towards other priorities, particularly underground water, coal geology and geotechnical surveys. Had staff been available, however, the continued deterioration in the transport situation is such that great difficulty would have been fo.und in achieving further progress in. regional mapping. Throughout the year the emphasis upon underground water investigation and development steadily increased, the arrival in February of a Principal Geologist to head the Hydrogeological Division (UN OPAS) allowing the programme, with its raised target under the Accelerated Rural Development Programme, to rapidly get under way and to produce an unprecedented number of boreholes - 224 with 104 successful. A new, major project directed towards the evaluation of underground water resources of Botswana was planned and short term consultancies were undertaken by experta,tront two potential donor agencies under which ~11!l!;t.rm. of reference and technical specificatiolla~p~!,.:tI1. project were written and submitted to Gov.rum.nt. Meanwhile, the Survey's contribution . ,. ",,,"0- sponsored Okavango Project continu,lld ways: as representative on the ''''.,,'(llilJloI Committee, as instigator o.Xf.n:aLt~l!~~,lt study, and as adviser and j study the underground water Okavango Basin under which two' terms of reference. Extended discussions were held with Professor Howe who is retained by Government as a consultant on water policy. In September the Department's drilling capacity was greatly increased by the acquisition of a Schramm air rig, at a cost of some RIOO 000. A consultancy on coal undertaken by Powell Duffryn NCB was assisted in its enquiries. A relatively new departure in the Survey's work comprised two geotechnical studies for the extension of Lobatse township and the proposed new town at Sua planned for Makgadikgadi brine industry, and the second abattoir.
An Industrial Minerals geologist (UN ore) took up his post in August and work commenced on the special task of assessing the industrial minerals potential and establishing a mineral testing laboratory. Further contributions were made to the new Mines and Minerals Act and as a member of the Mineral Policy Committee to policy matters regarding mineral exploration and development. The last privately held mineral rights, in the Tati concession area, finally passed to the state, and considerable time was spent in dealing with companies who contemplated applying for a concession in the relinquished area, and in assisting the UN Regional Mineral Resources Adviser towards a possible similar undertaking. The Director is a member of the Natural Resources Technical Committee, but this body, which is the only means by which scientific departments can discuss and contribute their opinions to Government, was allowed to become moribund by the second half of the year. The Director visited Memorial University, St. John's, Newfoundland, to take part in a Workshop on Earth Science Aid and was elected to the Organising Committee of a new association concerned with the effective application of the earth sciences in the developing countries (AGID). A seminar was held in February at which over 40 persons from the Private Sector and other Government Departments were present. The results of work accomplished by the Department over the previous mapping season were presented and discussed. During the year the results of a National Gravity Survey of Botswana were presented in preliminary form. Botswana's participation in the ERTS-I project came to an end with the publication of a final report in May. The Geological Survey was the sponsoring agency in Botswana. The activities of the Department were demonstrated to the public in a display at the Gaborone Trade Fair in July. A start was made on improvements to the stores building, but these were not completed by the end of the year and it did not prove possible to carry out the re-organisation of the stores and equipment that so urgently needs to be done. A consultant from Canada paid a visit in October to attempt to finalise the specifications of the major, regional airborne magnetometer survey, but changes initiated by the donor agency (CIDA) has again delayed the implementation of this project.
1.3 Staff
1.3.1 Death of Mr. W. Burgoffer Mr. Worth Burgoffer died suddenly in Johannesburg on August 23, 1974. He died of a heart attack at the wheel of his car. Burgy, as he was known to his innumerable friends in Botswana, occupied the post of Senior Diamond Driller in the Survey from early 1965. As well as playing an important role in mineral exploration, he occupied a special place in both the organisation and in the affections of the staff. He spent a great deal of his time in remote areas and was adept at living comfortably in the bush. He was a metiCUlous craftsman and took a great pride in maintaining his fleet of vehicles to a high standard. His voice will long be remembered from the radio "sched" because on many occasions when conditions were bad, Burgy was able to provide a link between headquarters, the Drilling Branch and the men in the field. At the time of his death, Burgy had just terminated his final contract and was anticipating a less arduous life as a farm manager after his many years of bush life.
1.3.2 Staff Movements The senior staff position in 1974 was unsettled as a result of the termination of contracts of the many officers who had joined the department between 1971 and 1972. Dr. J. V. Hepworth, who had served three years as Director on secondment from the Institute of Geological Sciences, London, returned to Britain at the end of October.
4. Dr. C. R. Jones, Deputy Director, who was also on secondment from I.G.S., left in May. Dr. R. D. Walshaw, who had arrived in January on secondment from I.G.S. to take over the post of Principal Geologist (Field Mapping) was promoted to Deputy Director as from Dr. Jones' departure and was Acting Director from November until the end of the year. Dr. J. W. Baldock, Principal Geologist (8conomic Geology), was on leave from April to July. On his return, he was offered the personal appointment of Assistant Director pending establishment of the post. Mr. J. Wroblicki who was recruited under United Nation auspices was appointed as Consultant Geologist (Industrial Minerals) in August.
~lr. S. A. Holmberg, who was also recruited by U.N. took up the vacant post of Principal Geologist (Hydrology) in January. Mr. B. Motsete was promoted to Senior Geologist with effect from September 1973 and Dr. B. S. I. Marengwa was promoted to Senior Geologist with effect from December, 1974. Mr. J. F. T. Houston, Hydrogeologist, and . Mr. N. W. D. Massey, Geologist, who were both serving on secondment from I.G.S. left respectively in January and Hay. The vacancies caused by their departure were filled by the arrival of Mr. I. N. Gale in September and ~jr. A. C. Skinner in December, both from loG.S. Mr. J. Chilton, Hydrogeologist was sent out from I.G.S. from March to July to complete outstanding fieldwork incurred by Hr. J. Houston's return to U.K. on compassionate grounds. Mr. I. R. Walker, Geologist, Mr. C. V. Reeves, Geophysicist, and Mr. G. Stansfield, Geologist, resigned on termination or their contract appointments in April, July and September respectively. Mr. D. G. Hutchins, Geophysicist, returned from overseas leave in March for a further contract period. Dr. R. M. Key, Geologist, left Botswana on termination of his contract appointment in July. Mr. J. N. M. Coates was promoted to Geologist from Scientific Assistant with effect from September.
5. Dr. D. Gould, Geologist, was on overseas leave from October until the end of the year. At the end of the year, the Director's post was still vacant although Dr. C. R. Jones of 1.G.S. had been designated for the position. His arrival was expected in January 1975. There was one vacancy for Principal Geologist (Field Mapping) and 6 vacancies for Geologist/Senior Geologist. Mr. E. R. James, Chemist, left Botswana at the end of November on termination of his contract appointment. Mr. R. J. Malejane, who is on permanent establishment, arrived back in Botswana in mid December after successfully completing his studies at Bristol Polytechnic, U.K. He was promoted to Chemist with effect from the date of his return.
I Mr. D. J. Hunt and Mr. 8. Jessie, Scientific Assistants resigned their contract appointments in January and Mr. B. V. J. Brislin, Scientific Assistant, left in October. Mrs. D. B. Gaboutloeloe, Senior Personal Secretary, was transferred to the High Court in September. Her place was taken by Mrs. H. M. Isaacs. Mr. W. Burgoffer Senior Diamond Driller, died SUddenly one month after his retirement in August. Mr. S. Orora who had only just been promoted to Drill Foreman also died in 1974. Mr. C. 1-1. Kotze and Mr. D. S. Duke joined the drilling branch staff on contract as Drill Foremen. 6. Other Drill Foremen who resigned during the year were Mr. P. H. F. Moll, Mr. W. M. Bond and Mr. R. J. Hutchens. Mr. B. ~indgren was appointed as second Drill Instructor. He is sponsored by SIDA. At the end of the year there were nine outstanding vacancies for Drill Foremen. 1.4 Financial Summary The total Recurrent Expenditure for the financial year 1973-74 was R584 794; an increase of ten per cent over the figure for 1972-73. The estimated expenditure for the financial year 1974-75 was R811 740 which represents a considerable increase caused, not only by inflation, but also by further expansion in the activities of the Geological Survey. The number of Development Projects in progress during the year was reduced from nine in 1973-74 to eight in 1974-75 with the transfer of the Air Pollution Control Project to the Department of Mines. A total of R147 932 was spent on the projects of which four were continuation projects funded through United Kingdom Development Loans and four were smaller, finite projects funded from internal sources and from the Swedish International Development Authority. Towards the end of 1974 the planning of three additional major projects had reached an advanced stage. These were Evaluation of Underground Water (GS 10), Industrial Rocks Laboratory (GS 11) and Airborne Magnetic Survey (GS 12). Revenue collected by the Department during the financial year 1973-74 amounted to R28 672, considerably less than in the previous year because of the transfer to the new Department of Mines of responsibility for collecting all revenue accruing from mining activities. Financial statements of expenditure and revenue are given in Appendix 2 together with estimates for 1914-15. 1. 4 UNDERGROUND WATER DEVELOPMENT 4.1 Geological Survey Activities Dr. D. Gould continued to act as head of the Hydrogeological division until the arrival of Mr. S. A. Holmberg, a UN appointee, in February. Geological and geophysical surveys for groundwater supply were carried out in the following districts: Ghanzi District: Mr. J. Chilton, on a 3 month secondment from lGS, completed the hydrogeological survey begun by Mr. J. Houston for the Western State Lands Project. Dr. M. Litherland sited further boreholes in the area at a later date during his field mapping operation. Kweneng District: Geological siting was conducted by Dr. R. D. Walshaw and Mr. B. Motsete. N9waketse District: Geological and geophysical resistivity surveys were carried out towards the end of the year by Mr. I. N. Gale for the Western Ngwaketse Development Project. North-West District: Geophysical resistivity traverses were carried out by Mr. B. Brislin and Mr. J. Davies for a number of villages and the Roads department. North-East District: Geological siting was undertaken by Mr. B. Motsete and geophysical resistivity siting by Mr. J. Davies for the Roads department and a livestock project. Mr. S. Holmberg also carried out magnetometer sitings near Tutume. Australian Groundwater Consultants used geophysical resistivity methods for borehole siting in the Somerset West well field near Francistown. Central District: Tona Earth Resources Consultants undertook geophysical resistivity traverses along the Francistown-Nata-Dukwe road for the Roads department. Southern and South-East Districts: Mr. S. Holmberg carried out magnetometer sitings for villages and the Roads Department in these areas. On balance, sites selected by geophysical means give better results than those chosen purely by geological methods and more extensive use of geophysics is recommended. 19. 4.2 D,rilling Branch Activities During 1974, a total of 3960 metres was drilled by the Government Drilling Branch representing 104% of depth drilled during 1973. Most of the drilling was done with percussion rigs but a Schramm (down-the-hole-hammer) rig came into successful operation during the year. Three drillers left the service on completion of their contracts while two new drillers were recruited. Six drillers were in post at the end of the year. The trainee drillers began an active contribution to the government drilling programme. The drilling branch worked on 46 boreholes in 1974; 8 boreholes which had been started in 1973 were completed, 30 new boreholes were completed while 8 existing boreholes were cleaned out or re-tested. Two boreholes had to be abandoned for technical reasons. Of the 3 960 metres drilled by Government in new boreholes for water supply, 2 572 metres were drilled in successful boreholes. Excluding cleaned out and retested boreholes, the Government's success rate was 56%. Most of the new boreholes were drilled for Government or D~strict Councils. Four boreholes were drilled for private customers after which Government ceased drilling operations for private individuals. The trainee drillers expanded their active field experience in 1974. Borehole 2581 at Botswana Agricultural College, and borehole 2616 in the Drilling Branch yard at Gaborone were drilled under supervision, Borehole 2831 at Senamane in the Kweneng District was drilled entirely without supervision. Although the yield was only 9 litres per minute and was thus inadequate for a regular water supply, the work was quite satisfactory. Details of Government drilling operations are given in Appendix 5, tables (a) and (b). 4.3 Contract Drilling GS 09 The major contract drilling programme initiated in 1973 to cope with the backlog of borehole applications and the requirements of the Accelerated Rural Development Programme got under way in 1974. Eight contractors were engaged by Government who drilled a total of 186 boreholes. Production boreholes numbered 168 of which 76 were successful, a success rate of 43%. Nine boreholes were abandoned and 18 test boreholes were drilled at Francistown. Of the total meterage of 16 482 metres drilled by contractors, 7 412 metres were drilled in successful holes. Details of contract drilling are given in Appendix 5, table (c). 20. Appendix 4 provides a statistical analysis of total drilling operations. Boreholes for which pumping rates were not quoted are assumed to have been unsuccessful. 21. Analysis of the data is currently in hand at Lamont Doherty. A full report on the results and conclusions on the nature of seismic activity in the region is expected within the first half of 1975. 6.6 Miscellaneous Studies Geophysical techniques were widely used in the search for underground water, geotechnical studies and in a special feasibility study undertaken by J. N. M. Coates for Shell Hotswana (Pty.) Ltd. 6.7 Geophysical Equipment Design improvements to the departmental resistivity sets led to the development of model GS/D 74. Certain complexities in the previous models have been eliminated while reliability and versatility have been maintained. The major modification has been the replacement of the moving coil voltmeters and ammeters with Fluke model 800A-Ol digital multimeters. This set has proved extremely reliable in operations under severe conditions and results of a high standard have been obtained from surveys in the Maun, Letlhakeng and Western Ngwaketse areas. Delays in the delivery of other geophysical equipment have hindered other developments although by the end of 1974 the department had obtained two Sperry Land Navigators and one Hewlett-Packard model 9830A desk top computer. 27. 9 HEADWUARTERS WORK 9.1 Chemical Laboratory 'I jl 9.1.1 Introduction \ Chemical laboratory services continued to be developed during 1974. The routine analysis of waters, rocks and air has been facilitated by the purchase and installation of equipment and by a full establishment of professional staff. However, staff shortages at the higher technician level have proved a hindrance to progress. For the last two months of the year the laboratory extensions were being improved by the Public Works Department, in the hope that by early 1975 the laboratory complex will be completely rewired to safe specifications. The loss of power during the renovations affected the work output marginally with approximately 3 weeks lost due to power cuts and voltage reductions. Although output of water analyses was down on previous years, the advent of geochemical work kept all staff busy throughout the year learning new techniques and production line methods. 9.1.2 Rock Analysis Silicate rock analyses were undertaken by the professional laboratory staff. Details are given on next page. 9.1.3 Water Analysis Analysis of water borehole samples again formed a prominent feature of routine analytical work. This work is undertaken both as part of a long term programme of investigation into the composition and geochemistry of groundwaters in l~tswana, and also for the immediate assessment of the potability of supplies developed during underground water development work. Collaboration with the Nuclear l'hysics Research Unit of Witwatersrand University continued on research into ages and types of Hotswana groundwater. A field trip was made to the Western State Lands in October. Assistance was also given to Sir Alexander Gibb and Partners, Consulting Engineers, on their Mochudi and Molepolole water-supply contracts. A method for the determination of nitrates was developed by Hr. E. R. James. 32. Research was carried out into the field determination of water analysis and the change in pH, carbonate and bicarbonate content on storage. The water analysis methods were continuously improved and primary method sheets prepared by ».Jr. E. R. James; it is hoped that publication of the methods will be achieved in 1975. The number of samples increased towards the end of the year once the drilling programme in support of the Accelerated Rural Development Plan was underway. Details of the number of samples are as follows: No. of Samples Determinations Effluent Samples 53 159 Water Samples 525 6 300 Total 578 6 459 9.1.4 Air Pollution Analysis The Department of Mines holds responsibility for Botswana's Air Pollution Control l-rogramme. An expanding schedule of work has been undertaken by the Chemistry Division of the Geological Survey in the analysis of air pollution samples. Samples collected monthly by the Air Pollution Control Inspector are analysed for sulphur oxides and trace metals in dust fallout in the Chemical Laboratory. Analyses were undertaken on the atomic absorption spectrophotometer at the Veterinary Department, Gaborone, during November and December while workmen were in the chemical laboratory. Junior Staff in the laboratory have been trained in the analysis of the air pollution samples. Samples are now being analysed from the following locations: Selebi-Pikwe (7 sites), Morupule (2), Orapa (2), Gaborone (1), Sua Spit (2). The number of samples analysed are detailed below: No. of Samples Determinations Dust Fallout 151 1 057 Sulphur Oxides 128 128 Total 279 1 185 34. APPENDIX 4 Statistics ox Drilling Operations carried out by the Drilling Branch and Under Contract during 1974 N.B. Boreho1es xor which no pumping rate is quoted in Appendix 5 are assumed to be unsuccess£u1. M ... (/) (/) (/) M 'H QI QI QI (/) ;:s (/)'" '0 5 M M M 4> 'H (/) QI 0 0 0 M k IJ (/) QI a '0 .c: .c: .c: 0 0 4> 11) 0 0 QI QI QI 01 .c: (/) 'H s:l 01 0 '0 a '0 k k (/) k (/) QI 01 0 ::l a tG QI 0 OM Ok k M - - 0 (/) tI! 01 0. '0 .0 .0 .... .oQl O~ (/) '0 ::l s:l .0 M 0-- QI 0 S .8 .c: • Q1~ QI (/) ;:s tG 0 M4> ... M Ma MO 01 0 M(/) M QI ... 01 ::l M k ... o a M a a a (/) M 'H 'HO'" 'H(/)"' ... o 01 .c:o ...... 01 ~ E '" ~ ~ 0. (/) ... (/)U 'H .0 Q1(/) k~ ~ M '0 .... (/) a (/) (/)0(/) '" (/)'" a k tI! 'O(/) 'O(/) 'O(/) 'O(/) 0'0 S QlQI QI ... QI (/) MOl o QI QI QlQI QI QI QI QI .c:QI >.S 0 00 o 01 QI .ok .c:k Mk Mk Mk QI ... Mk g~ 0·... O+, 0 'H'" ....a ...... ri+, M+' M+' k(/) 0.4> (/) ;:s k 0 11) M 'OM p..QI .... QI .... 01 .... QI 04> p..p' +' 4> (/)QI '"(/) ...k '"(/) :>tI! Vl tG QI tI! k El k El k El .o+, ::l 0 M :> (/) 'rl (/) QI (/) a 0 .gs '0- '0- '0- (/)11) .... 0 'HO 'H 'rl 'Hk '" 0 O·rl a 'HQI• QI k .c: OC) 00 Op.. rl o a 'Oa MVl .c:Vl .c:(/) .c:(/) Ok kk ... QI tI! a.c: tI! QI ... QI ... QI ... QI 4> ... (/) k • k • k • k ... '"II)k >. tG 0 "'M p..M p..M p..M .'0 ... ·rl .... 00 00 00 0 a'O .QQI 00 QlO 4>0 oa tGrl 0 S Z'H Z'H Z'H f-c ;::J- <.:+' f-c.c: O.c: O.c: ~.8 Ztl! ~- Central 53 16 17 33 20 5 495 3 739 1 756 2 3 195 Ghanzi 9 5 1 6 3 1 105 736 369 327 Kga1agadi 9 2 3 5 3 1 914 641 235 38 332 Kgat1eng 8 2 2 6 761 76 685 4 91 Kweneng 47 7 8 15 26 6 5 238 1 912 3 326 315 2 1 359 North-East 35 1 13 14 20 1 2 342 791 1 551 ? 3 263 North-West 29 9 4 13 14 2 1 .274 697 577 115 1 363 South-East 13 3 4 1 8 5 1 .167 630 537 979 Southern 22 4 3 1 8 13 1 2 146 762 1 384 30 305 TOTAL 224 47 55 2 104 110 11 20 442 9 984 10 420 498 8 12 214 Drilled by Government 38 13 8 2 23 14 2 3 960 2 572 1 254 164 8 1 752 Drilled by Contractors 186 34 47 81 96 9 16 482 7 412 9 166 334 10 462 ''''-''''''''".,""" Official Locality D-istrict Customer Total Depth Static Pumping water Geology No. depth water water rate quality (m) struck level (l/min) (m) (m) 2755 Bog09obo Kgalagadi Council 39 31 7 41 '1'D5=905 Fresh Sand 2774 Letlhakeng Kweneng Roads 92 34 21 114 Fresh Karroo 2793 Midd1epits Kgalagadi Council 52 16 16 ? '1'D5=34090 Fresh Sand 2794 Ku1i-Ncojane Ghanzi L.P.M.U. 168 130 121 45 '1'D5=lOOO "Swartwater" 816 Fresh Karroo sandstones 2811 Motokwe KWQlleng Council 157 137 ? 91 Tools lost Abandoned Karroo sandstones 2825 Rappel's Pan Kga1agad1. Council 105 56 56 32 '1'D5=1600 Fresh Sand, Sandstone 2828 Pilane I Kgatleng Council 46 Elank Felsite 2829 Pilane II Kgatleng Council 180 ? 91 4 Fresh Gramte, Amphiboli te 2630 Mmoothate Kweneng Roads 138 128 68 114 '1'05=1877 Fresh Karroo sandstone 2831 Senamane Kgatleng Council 121 35 35 9 TD5=361 Fresh Waterberg sandstone 2838 !tIorwa Kgatleng Council 186 122 30 4 Granite 2839 Gakhibane Kga.lagadi. Council 94 74 100 TD5=1402 Fresh Shale 2855 Kbudumelapye Kweneng Private 36 Blank - Abandoned 2856 Motokwe Kweneng Council 128 Abandoned - Tools lost. 443 Lentsweletau. Kweneng Private 48 34 Cleaning Fresh Karroo 707 Let1hakeng Kweneng Private 73 4 Cleaning 64 Fresh Karroo 1509 Serowe Central Prisons 107 40 31 Cleaning 173 Fresh Karroo 1510 Sero.e Central. Prisons 122 47 27 Cleaning 91 Fresh Karroo 2784 Mochudi Kgatleng Water Mfairs 37 19 8 Pumptest TDS=457 227 Fresh Alluvium 2785 Moehudi Kgatleng Water Affairs 38 12 Pumptest 23 Fresh Alluvium 2786 Mochudi Kgatleng Water Affairs 42 20 6 Pumptest TDS=865 250 Fresh Alluvium 2787 Mochudi Kgatleng Water Affairs 65 12 Pwnptest 18 Fresh AlluviUDl ----======::::::::"~~~::::::--""'>~ ~ \i "\.,,,~,,"j (b) Details of tiOreholes sunk under contract to Government Official Locality l)istrict Customer Total Depth Static Pumping Water Geol.ogy No. depth water water rate quality (m) struck level (l/min) (m) (m) 2570 l 2626 CWaanyaneng Southern Council 116 TD5=5964 Sa.l.ine Calcrete, Granite 2627 Magoriapitse Southern Council 113 1 7D5=212 Granite 2628 Mmathetbe Southern Council 90 Bl.ank Granite 2629 Maelo Southern Roads 46 40 29 273 TDS=364 Dolomite 2630 Ramonnedi Southern Roads 94 85 20 59 TD5=715 Fresh Schi.sts 2631 Tsibanana Central Council 60 43 6 2 Sand 2632 Tha1_ Central Council 92 Blank Granite 2634 Monyatale Kweneng Council 107 32 33 14 TDS =400 Fresh Waterberg sandstone 2635 Molepolo1e Kweneng Water M:fairs 28 Abandoned Clays 2636 Thaaaga. Kweneng Water A:f£airs 62 Blank Granite 2637 K""pe Kweneng Council 82 Blank Diabase 2638 Moselele Kweneng Council 143 Blank Granite 2639 Tsibanana Central Cbuncil 57 47-53 24 32 TD5=1076 Fresh Sand, Sandstone 2640 Thaaaga Kweneng Water Mf airs 133 Granite 2643 Molepolo1e Kweneng Water Mfairs 79 18-21 0 114 TDS=l44 Al.luv1um, 52 Waterberg 2644 Molepolole Kweneng Water A:f£airs 60 5-16 3 227 TDS=944 Alluvium, Waterberg 2645 Molepolole Kweneng Water Af£airs 84 6 70 Alluvium 2646 Tbmaaga. Kweneng Water Af£airs 161 14 Gaborone granite 2650 Mathathane Central Council 46 9 5 278.8 TD5=656 748 Fresh Granite 2651. Platyan (Tuli Block) Central Customs 12 Blank Granite 2652 Pont Drift (Tuli Bl.ock) Central. CUstoms 91 24-58-91 13 377 TD5=268 Basalt 2653 Lentswelamoriti Central Council 164 18 14 18 TD5=4472 Sandstone 2654 Maun North-West ? 34 Blank Kalahari sand 2655 Maun North-West ? 23 3 3 150 Ka1ahar:l sand 2656 Medie Kweneng Council 153 40 30 11 TD5=560 Waterberg sandstone 2657 Botlhapatlou Kweneng Council 109 Blank Granite, Dolerite 2658 Maapaaroka Kweneng Council 62 Blank Doler:i.te 2659 Hubasanoko Kweneng Council 152 73 52 14 Granite 2661 Maun North-West 1 23 4 152 Sand 2662 Moeroela North-West Council 96 53-67 44" 16 Silcrete, Sandstone 2663 Kalkfontein Gbanzi L.P.M.U. 61 Blank OfHdal. i.oca.l.ity District Customer Total Depth Statie Pumping Water Geology No. depth water water rat.e quality (a) struck level (l/min) (m) (m) 2665 Platyan Central CastOlll.S 26 9 3 27 Granite 2667 28lal N.W. ToteDg North-West Agriculture 34 22 L7 76 Saline Sand, Clay 2668 24km N.W. Toteng North-West Agriculture 41 23 13 68 TDS=23953 Saline Sand and Clay 2669 Maalore Southern Roads 98 16-85 40 73 TDS=328 500 QuartZite, Schists 2670 Ranaka Southern Council 35 12 1 303 TOS=48 Al.luviua 2673 Molepolole Kwaneng Water M£a5.rs 69 5 Alluviwa 267. Francistown Francistown Water "Kate" North-East Supply 127 7 192 2675 Molepolole Kweneng Council 69 Abandoned Alluvium 2676 Francistown "Marion" North-Bast Council 126 24 114 2677 Franclstown O/A Saxah North-East Council 124 13 2666 Seaolale Centra1 Police 223 5-207 5 23 Fresh Granite 2678 FranelstOWD. O/A Sant1e North-Ra.st Council 122 15 2679 Francistown TS/12So.. North-East Council 122 20 2680 Francistown T6/11o. O/A .Sandy North-East Council 122 7 2681 Franeistown T7/44OIII. O/A Ellsabet North-Bast Council 76 7 2682 Franeistown T7/44C8 O/A: Tanya North.. East Council. 61 5 2683 Francistown T7/l8Oa PIA Lee North-East Council 30 7 306 2684 Francistown T7/20Qa O/A Gertrude North_East COuncil 121 13 2685 Francistown O/A Helen North-East Council. 122 14 2686 Francistown T8/1140 C/A Colleen North-East Council 122 25 2687 Francistown T6/3oa.. C/A Rosslyn North-East Council 31 9 Al.luviwa. ""','_-'i'»'"' __ """"~> __~-"'-""-'_-'w'-="'=-~'.''':''_ '~__ '_"""M;"";"';"'""""_"''-'"' '?"" _.",,,v;c-__ 'vW,"~y;,".4/i'"-v''''''''-'''_,-,~,._e_,,; __ .,,, .. ,-.,, nfficial Locality District Customer Total Depth Static Pumping Water Geology No. depth water water rate quality (m) struck level (l/min) (m) (m) 2688 Francistown T6/11~ O/A Anne North-East Council. 31 6 Alluvium 2689 Franci.stown T6.110lll. O/A Jane North-East Council. 46 9 168 All.uvium 2690 Francisto.-n TU/6_ O/A Sopbie North-East Council 31 5 Alluvium 2691 Francistown S/P 20 'PIA Lucy North-Bast Council 46 13 535 Alluvium 2692 Franci.stown B/P 20 O/A l:.u.cy North-East Council 36 13 Alluvium 2693 Francistown BP 14 'PIA Fiona Somerset West North-Bast Council 46 8 766 Alluvium 2694 Franeistown BP 14 O/A Fiona Scaerset West North-East Council 21 9 AlluvitllD. 2695 Franci.atown T8/87CD. North-East Council 46 24 229 Alluvium 2696 Franeistown T8/87~ O/A Ruth North-Bast Council 37 24 Alluvium 2697 Francistown Tb/800m O/A Judy North-East Council 33 12 229 Alluvium 2698 Francistown TlO/56Cb. PIA CilIa North-East Council 46 12 229 Alluvium 2699 Francistown 7101560:1. BP 16 O/A Cilla North-East Council 29 13 Alluvium 2700 Francistown North-East Council 5 TDS=8856 Alluvium 2701 Mogobane South-East Council 155 52 52 27 TDS=260 407 Quartzite 2702 Mogobane South-East Council 123 1 TDS=332 Fresh Quartzite 2726 Panda-Nata Road Central Grove International 51 32 32 61 Sand 2728 Nata Road Central Grove International. 124 40 35 76 Saline 2129 Nata Road Central Grave International 153 34 17 227 Sandstone Official Locality District CUstomer Total Depth Static Pumping Water Geology No. depth water water rate quality (m) struck. level (l/min) (m) (m) 2730 Nata Road Central Grove International 137 27 227 Saline Sandstone 2731 Nata-Kasane Road Central Grove International 76 21 20 76 Saline Sandstone 2732 Nata Road Central Grove International 84 5 5 53 Saline Sand 2733 Nata-Kasane Road Central Grove International 128 37 16 106 Saline Sandstone 2734 Nata-Kasane Road Central GrOVe International 64 15-34 11 30 Saline Sandstone 2737 Sehitwa North-West Council 42 25 15 76 Fresh Sand 2738 $ehitwa-Tsau Road (B848) North-West Roads 49 24 19 114 Fresh Sand, C1ay 2739 Nsbakasbokwe Central Council 68 Blank Granite 2740 Magapatona (Tutume) Central Roads 51 26 18 303 1.'D5=642 Fresh Granite, Pegmatite 2741 Magapatona Central Education 88 30 15 227 1.'D8=328 Fresh Granite, Pegmatite 2742 Magapatona Central Education 70 21 9 132 1.'D5=449 Fresh Granite, Pegmatite 2743 Magapatona Central Education 121 Blank Granite 2744 l.'embes Village (Tutume) Central Council 95 55 22 23 1.'D5=600 809 '" Fresh Quartzite 1" 2745 Mak.uta Central . Council 117 ? TDS=624 Granite 2746 Matobo Central Council 154 18 7 28 TDS=445 Quartzite, Granite 2747 Magapatona Central. Bducation 96 24 17 136 TDS=280 388 Granite 2748 Magapatona Central Council 94 21 18 53 1.'D5=796 1188 Granite 2749 Nshakashokwe Central Council 174 Blank Granite 2150 Mswazi Central Council 102 24 17 30 1.'D5=555 Fresh Gran:i.te 2751 Nshakashokwe Central Council 127 Blank Quartzite 2753 Sehitwa-Tsau Road North-West Roads 42 25 21 76 Saline Sand and Clay 2754 Sehitwa-Tsau Road North-West Roads 50 26 20 114 TD5=26548 Saline Sand 2756 Lekgolobotlo Southern Council 143 137 30 68 Fresh Granite 2757 Magoriapitse Southern Council 123 Blank Granite 2758 Magoriapitse Southern Council 157 Blank Granite 2759 Maathethe Southern Council 107 Blank Granite 2760 Leporung Southern Council 56 43 20 333 TD5=682 564 Fresh Granite __ ~~m~~m __" __ m' __ .... ______ Official Locality District Customer Total Depth Static Pumping Water Geology HO. depth water water rate quality (m) struck level (l/min) (m) (m) 2761 Abtond Hill South-East Council 161 52 52 1 Fresh Granite, Dolerite 2762 Mannyelanong South-East Council 136 94 72 45 TDS=390 Fresh Shales 2763 Sakhutswana South-East Council 113 24 11 16 TDS=287 Fresh Sha1es 2768 Mok.gomane Southern Council 101 Blank Granite 2769 TSaJaaya. North-East Council 128 81ank Granite 2170 Pole North-East Council 184 Blank Granite 2771 Siviya, North-East Council 56 21 13 114 Fresh Quartzite 2772 Makalellg North-Bast Council 50 20 20 114 TDS=200 Sand and Clay 2773 Jakalas No. 1 North-Bast Council 34 18 11 139 Granite 2775 Tsau-Toteng North-East AgriCulture 31 18 12 Water disappeared Sand 2776 Nshakasbokwe Central Council 99 Blank Quartzite 2777 Matsiloje North-East Poli.ce 32 18 10 152 Granite 2779 MJaamagofu South-East Council 153 Blank Granite 2780 1'8au North-West Roads 40 31 27 11 Sand 2781 Waterpits North-West Agri.culture 69 40 Water disappeared Boulders 2782 La miles N. Tsau North-West Agriculture 41 25 18 17 TDS=6353 15 Sand '"'" 2783 Thamaga Kweneng Water Af.fairs 153 11 12 11 Fresh Gaborone granite 2788 Gabane Kweneng Council 105 31 16 27 Granite 2789 Molepolole Kweneng Water Af.fairs 16 Abandoned Alluvium 2791 Molepolole Kweneng Water A.f:fairs 38 7 Abandoned A1.luvium 2792 Potsane South-East Council 80 40-75 15 40 TDS=416 Fresh Sehists 2795 Plmduhudu Kgalagadi L.P .M.U. 38 Abandoned Sand 2196 Kalkfontein Ghanzi L.P.M.U. 183 110-172 110 16 TD~2000 1124 Fresh Quartzite 2799 Ka.lk£ontein Ghanzi L.P.M.U. 189 Blank Quartzi.te 2800 Kalkfontein Ghanzi. L.P.M.U. 122 107 101 41 TDS=122l Sandstone 2806 Sa.sakwe Kweneng Council 43 Blank Granite 2801 Kgope Kweneng Council 30 Blank 2808 Sasakwe Kweneng Council 161 85 1 Granite, Felsite 2809 GabaDe Kwcmeng Council 55 Granite 2810 Gabane Kweneng: Council 50 31 23 21 Granite =2 Lentswelamoriti Centra1 Council 225 21 5 2 Granite 2813 lCobojango Centra1 Council 151 21-140 5 106 TDS=864 Fresh Sandstone Q£ficl.al. Locality District Customer Total Depth Static Pumping Water Geology No. depth water water rate quality (m) struck level (l/min) (m) (m) 2814 Tsau-Toteng Road North-West Agriculture 47 37 23 Fresh Sand 2815 Toteng-Nokaneng Road North-West Roads 46 34 20 Saline Sand 2816 1'sau North-West Agriculture 46 Blank Sand and Clay 2817 Tsau-Nokaneng Road North-West Agriculture 48 45 24 Running Sand Sand 2818 Nokaneng North-West Roads 49 40 34 Running Good Sand, Calcrete, Sand Clay 2819 Nokaneng-Xangwa North-West Council 61 Blank Sand 2820 Xgashe North-West Council 48 6 91 Good Gneiss 2821 Xangwa North-West Council 29 3 3 189 Gneiss, Dolerite 2822 Mogoditshane Kweneng Council 147 76 22 14 1'D5=1277 Fresh Granite, Dolerite 2823 Mogoditshane Kweneng Couocil 123 Blank Granite 2824 Kgope Kweneng Council 187 Blank Felsite 2832 Tlhareseleele Southern Council 30 Abandoned Felsite 2833 1'lhareseleele Southern Council 85 22 5 12 1'05=516 356 Fresh Felsite 2837 Kgomokasitwa Southern Council 148 Blank Granite 2840 Ramokgonami Central Council 71 40 39 0 Fresh Granite 2841 Seleka Central Council 93 52-64 49 11 TD5=266 Fresh Granite 2843 Nokaneng-Xangwa North-West Council 61 Abandoned Rising Sand Sand 2844 Gomare North-West Council 54 Abandoned Rising Sand Sand 2845 Gomare North-West Council 61 Blank Sand 2846 Gomare North.. West Agriculture 59 Rising Sand Sand 2847 1'sau North-West Agriculture 43 37 30 Rising Sand TDS=2775 Sand 2848 Thamacha North.. West Agriculture 100 64-88 48 63 1'D5=2775 Fresh Sand, Schists 2849 Gomare North.. West Agriculture 49 23 Blank Risind Sand sand 2851 Mahalapye Central Council 124 82 79 19 TD5=474 Fresh Waterberg sandstone 2852 Ramokgonami Central Council 97 27 18 109 Fresh Granite 2853 Seleka Central Council 172 122 4 45 1'D5=219 Fresh Granite 2854 Matebeleng Kgatleng Council 144 Blank Granite "~'W~''''''M''''''_='''',,,-,w=,,,,~_,, ~~ __""",~~~~._,_~""", (c) Details of Boreholes sunk by Private Contractors to Private Individuals !i:.!h Boreholes 2834 and 2835 were intended for minor irrigation and are accepted by owners as success:ful. Of':ficial Locality District Customer Total Depth Static Pumping Water Geology No. depth water water rate quality (a) struck level (l/min) (m) (m) 2834 Matasalalo Southern Private 142 80 61 13 TDS=70S 410 Fresh Granite 2835 RaJIlatlabama Southern Private 143 130 15 5 TDS=587 440 Fresh Granite 2836 Ditlbarapeng Southern Private 148 2 Fresh Granite