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Transcriber's Note: Words in italics are indicated like _this_. Subscripts
are indicated like this: H_{2}O. The original publication has been
replicated faithfully except as listed at the end of the text.

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                           TABLE OF CONTENTS


          INTRODUCTORY.                                    475
          THE CONCESSION.                                  476
          GEOLOGY AND TOPOGRAPHY.                          476
          POPULATION, AREA, AND MORTALITY.                 479
          RAINFALL AND TEMPERATURE.                        480
          AVAILABLE SOURCES OF SUPPLY.                     484
          MATERIALS FOR CONCRETE.                          491
          ESTANZUELA SUPPLY.                               494
          SOUTH DISTRIBUTING RESERVOIR.                    506
          SAN GERONIMO GRAVITY SUPPLY.                     514
          DISTRIBUTING RESERVOIR AT OBISPADO.              525
          COMPARISON OF SOUTH AND OBISPADO RESERVOIRS.     530
          ANALYSES OF ESTANZUELA AND SAN GERONIMO WATERS.  532
          CITY WATER DISTRIBUTION SYSTEM.                  532
          MAIN SEWERAGE SYSTEM.                            539
          MAIN OUTFALL SEWER.                              542
          SEWAGE DISPOSAL WORKS AND IRRIGATION LANDS.      545
          QUALITY OF AND RATES FOR LABOR.                  552
          COST OF WORKS.                                   552
          TARIFFS AND SANITARY REGULATIONS.                553
          ENGINEERS, ETC.                                  556
          DISCUSSION.                                      557
          JAMES D. SCHUYLER.                               557
          DAVID T. PITKETHLY.                              559
          V. SAUCEDO.                                      563
          GEORGE T. HAMMOND.                               567
          RUDOLF MEYER.                                    576
          GEORGE ROBERT GRAHAM CONWAY.                     580




                   AMERICAN SOCIETY OF CIVIL ENGINEERS

                           INSTITUTED 1852

                             TRANSACTIONS

                            Paper No. 1193

                    THE WATER-WORKS AND SEWERAGE OF
                       MONTERREY, N. L., MEXICO.[1]

            BY GEORGE ROBERT GRAHAM CONWAY, M. AM. SOC. C. E.

     WITH DISCUSSION BY MESSRS. JAMES D. SCHUYLER, DAVID T. PITKETHLY,
         GEORGE S. BINCKLEY, VICENTE SAUCEDO, GEORGE T. HAMMOND,
             RUDOLF MEYER, AND GEORGE ROBERT GRAHAM CONWAY.




                              INTRODUCTORY.


[1] Presented at the meeting of February 1st, 1911.

Monterrey, the Capital of the State of Nuevo Leon, Mexico, is built on
the site of the old village of Santa Lucia de Leon, which was
established in 1583 by the Governor of the Kingdom of Leon, Don Luis
Carabajal. Four years later Carabajal was imprisoned by the Inquisition,
and the village of Santa Lucia was abandoned by its few inhabitants.

In 1596, Captain Diego Montemayor, a resident of Saltillo, in the
adjoining State, wishing to render a service to his king, Philip II of
Spain, assembled his friends, and on September 20th of that year,
proceeded to establish a town on the site of the old village on the
northern side of the principal spring at the place. The town was named
"Nuestra Senora de Monterrey" (Our Lady of Monterrey), after the Count
of Monterrey (Ojos de Santa Lucia y Valle de Extremadura), the ruling
Governor of New Spain, as Mexico was then called.

Monterrey is approximately in the center of the State of Nuevo Leon, 1 deg.
12' west of Mexico City, and in latitude 26 deg. 40' N. It is a distributing
railway center on the main line of the National Railroad, 270 km. from
the Rio Grande at Laredo, 1,022 km. from Mexico, and 520 km. from
Tampico by the Mexican Central Railway. It is the center of many large
industries, and is the second largest manufacturing city in the
Republic.




                            THE CONCESSION.


The works described in this paper were carried out under a guaranteed
concession granted by His Excellency, General Bernardo Reyes, Governor
of the State of Nuevo Leon, to Messrs. James D. Stocker and William
Walker, of Scranton, Pa. The concession is dated October 19th, 1904, and
is for 99 years from that date; the works for a complete water and
drainage system were to be finished in 3 years from the time of their
commencement. Before the works were designed and begun, the concession
was acquired by Mr. William Mackenzie, of the firm of Mackenzie, Mann
and Company, Limited, of Toronto, Ont., Canada, who, on May 4th, 1906,
organized the Monterrey Water-Works and Sewerage Company, Limited
(Compania de Servicio de Agua y Drenaje de Monterrey, S. A.), under the
laws of the Dominion of Canada, of which company he is President. Mr.
Mackenzie is also President of the Monterrey Railway, Light, and Power
Company, Limited, which was constructing the street railways of
Monterrey concurrently with the water-works. Under the provisions of the
concession, the Government appointed a Financial Interventor, who had
authority to examine and check the company's expenditures, and also a
Technical Inspector to examine and report on the construction. The