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<br />294 <br /> <br />The Problem of Subsidenc< <br />sated or minimized. The results may be broadly <br />summarized as Eollot.s: <br /> <br />Y <br /> <br />Figurc ?. <br />y <br />Figure 3. <br />emrr,rs-either in natural springs er in the shafts <br />er boreho(rs from which it is pumped (sx•r Fig. 4). <br />Vorrover, it is clear from the occcrrence eE peat <br />bed; in subsidence "callevs" that the dissolution of <br />the salt has been occurrin; naturalf~ for eons of <br />time, and it is a matter of opinion a, to whether <br />the deliberate pumping of natural 6-ine has either <br />caused or accelerated the process. It is therefore <br />clear that subsidence due to salt e~tractior: poses <br />special, if not unidue, problems-Both technical <br />and IrQ:tl. <br />Some [wo years ago, a survey teas made under <br />the aegis of the European Committer for the Study <br />of Salt, to investigate the extent of the problem in <br />tho~r areas of Europe in which salt i, extracted by <br />means which might br suspected ~< gicino rise to <br />enhanced subsidence, and to review the legal pro- <br />crdurrs by which subsidence damage is compen- <br />FRAM\"CE <br />Subsidence occurs in Lorraine, in the lieupci <br />series of the Nancy region, around Dombasle <br />Compensation is dealt with under Article 72 0 <br />the Code hlinier, and sometimes gives rise tr <br />protracted litigation. <br />CER.~l.4A'}" <br />The problem arises on the Obersalzberg, nea <br />Berchtesgaden, and also in the Upper and Lotve <br />Necker region, where salt is mined from Chic' <br />beds in the Limestone series. Compensation i <br />negotiated directly' with the mine owner, who i <br />held responsible. <br />HOLLAND <br />As brine is extracted only by controlled Solt. <br />lion, in defined cavities no subsidence problem <br />arise, but paragraph 1401 of the Dutch Civil Rr <br />sponsibility Code makes provision for compens: <br />tion iE cases should ever arise. <br />/TA L Y <br />Subsidence does occur to some extent in tl, <br />Volterra and Lungro districts but is not regarde <br />as a serious problem yet. There is no legal prow <br />lion fur compensa[ion, which is the subject c <br />private agreement with the complainant. <br />_..- Mnr I • M <br />Inich` ~ , 1 <br />~ ~ '•._ ' iuwrsn. s s I <br />I ~ ~ `• ~ <br />~u.~wr.. <br />u r.... r I <br />Q to t. <br />~-r r'~• ~ rdbrch ~ ~ ` ~\ <br />~ ~ ''- 'i ~ <br />~ ~' ~~ ~ ~~ I f~ <br />.~ <br />a ~n °' rr,..a ~ I <br />/ <br />/ <br />v ~l % <br />I ` I <br />~. <br />i <br />~ i <br />i ~ <br />-.i .. - ~-'-------•~-- <br />Figure 4. Distribution of major lin<u subsidences resulting fr <br />solution of th< l'pper lieuper Saliferous bcds, <br /> <br />