The Rio Grande station is located at the upper end of White Rock Canyon, and is the most important in New Mexico. It was established in February, 1895, and shows the great influence on the flow of the Rio Grande of the Chama, the Santa Cruz, Nambe, and other streams entering the river in its passage through the Espanola Valley. Its record is as follows:

The station at San Marcial has been maintained since 1895, but owing to the shifting bottom results have been obtained with difficulty. This station demonstrates the influence of the flood-water flow on the discharge of the Rio Grande, there being no permanent streams entering the river between Rio Grande Station and San Marcial, and the spring flow, where there is any, being very small. In 1895 the record covers only the months from February to August.

Estimated monthly discharge of Rio Grande at San Marcial, N. Mex.

At El Paso, Tex., the river has been gauged at varying periods, but unfortunately
the record is not continuous. This station is of as much or more importance than

any of the others, as the data obtained here will be of the greatest importance in the

adjustment of the conflicting water rights claimed by New Mexico, Texas, and the

Republic of Mexico.

I present herewith all the data available on this subject.