MONTESCLAROS VICEROY

INUNDATION

ALBARRADA. 177

the midst of civilization and hastened back to the capital to give a bad report of the country which in our day and generation has become the El Dorado of the world.

The Conde de Monterey, was transferred to the viceroyalty of Peru in 1603, and left the capital amid the general grief of a society whose cordial esteem he seems to have won and retained during his whole administration.

DON JUAN DE MENDOZA Y LUNA, MARQUES DE MONTESCLARos, X. VICEROY OF NEW SPAIN.

The advent of the Marques de Montesclaros to the viceroyalty of New Spain was distinguished by an unusual degree of tranquillity throughout the colony. During the preceding administrations most of the subjects of internal discontent were set at rest, and the aborigines who had been subjected to the yoke were now becoming accustomed to bear it. In 1604, the abundant rains in the valley of Mexico during the month of August, caused an inundation which greatly alarmed the population. The city and adjacent country were laid under water, and such was the general distress that the Marques solicited the opinions of skilful persons in regard to the canal of Huehuetoca, which had heretofore been spoken of as the only means of freeing the capital from destruction by the swollen flood of the lakes. The reports made to him, however, represented the enterprise as one of immense labor and expense, as well as requiring a great length of time for its completion. He therefore abandoned the project for the present, and merely repaired the albarrada or dyke which Velasco had already constructed. In addition to this precautionary measure he caused the calzadas, or raised turnpikes of Guadalupe and San Cristoval to be constructed, which, whilst they led to the open country beyond the city, served, also, as additional barriers against the waters. After the completion of these highways, he next directed his attention to those of San Antonio and Chapultepec, which were quickly finished, and merited the name of "Roman works," for the massive strength and durability of their construction. Various other useful municipal works, such as aqueducts and sewers, engaged the notice of the viceroy until, in 1607; and after the proclamation of the Prince of Asturias (Philip IV.) by order of the king, he was ordered to pass from Mexico to Peru where he was charged with the duties of the viceroyalty.

CHAPTER VI.

1607 1621.

SECOND ADMINISTRATION OF DON LUIS VELASCO -HIS GREAT

WORK FOR THE DRAINAGE OF THE VALLEY.

LAKES IN THE

HISTORY OF THE DEOPERATIONS OF THE ENGINEERS

MARTINEZ AND BOOT. THE FRANCISCANS.

COMPLETION OF

THE DESAGUE. -LA OBRA DEL CONSULADO. NEGRO REVOLT.

DON LUIS VELASCO,-THE SECOND, CONDE DE SANTIAGO and FIRST MARQUES DE SALINAS,

XI. VICEROY OF MEXICO. HIS SECOND ADMINISTRATION.

16071611.

DON LUIS VELASCO had been seven years viceroy of Peru since he left the government of Mexico, when he was summoned once more to rule a country of which he felt himself almost a native.1 He was tired of public life, and being advanced in years would gladly have devoted the rest of his existence to the care of his family and the management of his valuable estates in the colony. But he could not refuse the nomination of the king, and at the age of seventy, once more found himself at the head of affairs in New Spain.

The government of this excellent nobleman has been signalized in history by the erection of the magnificent public work, designed for the drainage of the valley, of which we spoke during the last viceroyalty. The results of Velasco's labors were permanent, and as his work, or at least a large portion of it remains to the present day, and serves to secure the capital from the floods with which it is constantly menaced, we shall describe the whole of this magnificent enterprise at present, though our description will carry us, chronologically, out of the period under consideration, and lead us from the seventeenth to the nineteenth century.

1 Velasco had been sent to Peru eleven years before, and after governing it seven, had returned to reside in Mexico, when he was unexpectedly reappointed viceroy.

LAKES IN THE VALLEY

DANGER OF INUNDATION.

179

The valley of Mexico is a great basin, which although seven thousand five hundred feet above the level of the sea, and of course subject to constant and rapid evaporation, is yet exceedingly humid for so elevated a region. No stream, except the small arroyo, or rivulet of Tequisquiac, issues from the valley, whilst the rivers Papalotla, Tezcoco, Teotihuacan, Guadalupe, Pachuca and Guautitlan pour into it and form the five lakes of Chalco, Xochimilco, Tezcoco, San Cristoval and Zumpango. "These lakes rise by stages as they approach the northern extremity of the valley; the waters of Tezcoco, being, in their ordinary state, four Mexican varas and eight inches lower than the waters of the lake of San Cristoval, which again, are six varas lower than the waters of the lake Zumpango, which froms the northernmost link of this dangerous chain. The level of Mexico in 1803 was exactly one vara, one foot and one inch above that of the lake of Tezcoco,' and, consequently, was nine varas and five inches lower than that of the lake of Zumpango; a disproportion, the effects of which have been more severely felt because the lake of Zumpango receives the tributary streams of the river Guautitlan, whose volume is more considerable than that of all the other rivers which enter the valley combined.

"In the inundations to which this peculiarity in the formation of the valley of Mexico has given rise, a similar succession of events has been always observed. The lake of Zumpango, swollen by the rapid increase of the river Guautitlan during the rainy season, forms a junction with that of San Cristoval, and the waters of the two combined burst the dykes which separate them from the lake of Tezcoco. The waters of this last again, raised suddenly more than a vara above their usual level, and prevented from extending themselves to the east and south-east, by the rapid rise of the ground in that direction, rush back towards the capital and fill the streets which approach nearest to their own level. This was the case in the years 1553, 1580, 1604 and 1607, in each of which years the capital was entirely under water, and the dykes which had been constructed for its protection destroyed."2

Such is a topographical sketch of the country accurately given by a careful writer; and to protect an important region so constantly menaced with inundation, the viceroy now addressed himself. Accordingly he commissioned the engineer Enrique Martinez, in 1607 to attempt the drainage of the lake of Zumpango, by the

1 The level of Tezcoco is now, according to Mühlenpfordt, five feet seven inches (Spanish) below that of the city of Mexico.

2 Ward's Mexico in 1827, vol. 2, p. 282 et seq.

180

HISTORY OF THE DESAGUE OF HUEHUETOCA.

stupendous canal now known under the name of the DESAGUe de HUEHUETOCA.

"The plan of Martinez appears to have embraced two distinct objects, the first of which extended to the lakes of Tezcoco and San Cristoval, while the second was confined to the lake of Zumpango whose superfluous waters were to be carried into the valley of Tula by a subterraneous canal into which the river Guautitlan was likewise compelled to flow. The second of these projects only was approved by the government; and the line of the canal having been traced by Martinez between the Cerro or hill of Sincoque and the hill of Nochistongo to the north-west of Huehuetoca, where the mountains that surrounded the valley are less elevated than in any other spot, the great subterraneous gallery of Nochistongo was commenced on the 28th of November, 1607. Fifteen thousand Indians were employed in this work, and as a number of air shafts were sunk, in order to enable them to work upon the different points at once, in eleven months a tunnel of six thousand six hundred metres in length, three metres five in breadth and four metres two in height, was concluded.

"From the northern extremity of this tunnel called la boca de San Gregorio, an open cut of eight thousand six hundred metres conducted the waters to the salto or fall of the river Tula, where, quitting the valley of Mexico, they precipitate themselves into that of Tula, from a natural terrace of twenty Mexican varas in height, and take their course towards the bar of Tampico where they enter the gulf of Mexico. An enterprise of such magnitude could hardly be free from defects, and Martinez soon discovered that the unbaked bricks, of which the interior of the tunnel was composed, were unable to resist the action of water, which, being confined within narrow limits, was at times impelled through the tunnel with irresistible violence. A facing of wood proved equally ineffectual, and masonry was at last resorted to; but even this, though successful for a time, did not answer permanently, because the engineer, instead of an elliptical arch, constructed nothing but a sort of vault, the sides of which rested upon a foundation of no solidity. The consequence was that the walls were gradually undermined by the water, and that the vault itself in many parts fell in.

“This accident rendered the government indifferent to the fate of the gallery which was neglected, and finally abandoned in the The metre is equal to thirty-nine thousand three hundred and seventy-one English inches.

OPERATIONS OF THE ENGINEERS MARTINEZ AND BOOT. 181

year 1623, when a Dutch engineer, named Adrian Boot, induced the viceroy to resume the old system of dyke and embankments, and to give orders for closing the tunnel of Nochistongo. A sudden rise in the lake of Tezcoco caused these orders to be revoked, and Martinez was again allowed to proceed with his works which he continued until the 20th of June, 1629, when an event took place, the real causes of which have never been ascertained."

"The rainy season having set in with unusual violence, Martinez, either desirous to convince the inhabitants of the capital of the utility of his gallery, or fearful, as he himself stated, that the fruits of his labor would be destroyed by the entrance of too great a volume of water, closed the mouth of the tunnel, without communicating to any one his intention to do so. The effect was instanta neous; and, in one night, the whole town of Mexico was laid under water, with the exception of the great square, and one of the suburbs. In all the other streets the water rose upwards of three feet, and during five years, from 1629 to 1634, canoes formed the only medium of communication between them. The foundations of many of the principal houses were destroyed; trade was paralyzed; the lower classes reduced to the lowest state of misery; and orders were actually given by the court of Madrid to abandon the town and build a new capital in the elevated plains between Tacuba and Tacubaya, to which the waters of the lakes, even before the conquest, had never been known to extend.

"The necessity of this measure was obviated by a succession of earthquakes in the dry year of 1634, when the valley was cracked and rent in various directions, and the waters gradually disappeared; a miracle for which due credit should be given to the Virgin of Guadalupe, by whose powerful intercession it is said to have been effected.

"Martinez, who had been thrown into confinement in 1629, was released upon the termination of the evils which his imprudence was said to have occasioned; and was again placed by a new viceroy, the Marques de Cerralvo, at the head of the works bywhich similar visitations were to be averted in future. Under his superintendence the great dyke, or Calzada of San Cristoval was put in order, by which the lake of that name is divided from that of Tezcoco. This gigantic work which consists of two distinct masses, the first, one league, and the second, one thousand five hundred varas in length, is ten varas in width or thickness

'The Calzada of San Cristoval was originally erected, according to good authority, in the year 1605. See Liceo Mexicano, vol. 2, p. 6.