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, Leasburg Canal is first in the sequence; it is 13.7 miles long and had a capacity of 550 cfs in 1996. Twenty-five laterals are served through the Leasburg Canal, including the Picacho Main Lateral, which conveys water to the west side of the Rio Grande through the Picacho Flume. The Las Cruces and Mesilla Canals begin at a bifurcation at the end of the Leasburg Canal. The Las Cruces Canal is the higher of the two; it is 13.7 miles in length and had a capacity of 120 cfs in 1996. Eleven laterals receive water from the Las Cruces Canal. The Mesilla Canal is 11.9 miles long and had a capacity of 200 cfs in 1996. Sixteen laterals receive water from the Mesilla Canal. Both the Las Cruces and Mesilla Canals and several of their laterals discharge waste and surplus water into the East Side Canal. At the Mesilla Diversion Dam, water is diverted into the East Side Canal and the Del Rio Lateral on the east bank of the river and into the West Side Canal on the west bank of the river. The East Side Canal was constructed initially during 1914-15 and enlarged to its present configuration during 1918-19. It had a capacity of 250 cfs in 1996 and provides water for 9 laterals as well as supplying the Three Saints Main Canal. The Three Saints Main Canal supplies water to 13 laterals including the Three Saints East Lateral and Texas Lateral in Texas. The Del Rio Lateral is about 4 miles in length and supplies lands between the East Side Canal and the river. The West Side Canal was constructed initially during 1914-15 and enlarged to its present configuration in 1920. Its capacity was 600 cfs in 1996. In addition to supplying water to users through 18 laterals, it supplies water to the La Union Main Canal and the La Union East and West Canals. The La Union Main Canal supplies 4 laterals. The La Union East Canal supplies 12 laterals including the Canutillo and Montoya Laterals and several others in Texas. Water for the Montoya Lateral is obtained from the Canutillo Lateral and is siphoned under the Rio Grande to the east side of the river in the Montoya Siphon. The La Union West Canal supplies 11 laterals, including several in Texas. The drainage system in the Mesilla Valley is complex, involving several major drains and numerous spurs or branches. As for the drains in the Rincon Valley, these drains were developed primarily in the late 1910s and early 1920s. The Selden, Picacho, Del Rio, Santo Tomas River, La Mesa, East, West, and Montoya Intercepting Drains are the major drains that discharge into the Rio Grande. The Selden and Picacho Drain discharge into the river between the Leasburg and Mesilla Diversion Dams, with the Selden Drain discharging on the east and 2-11 r,' C.,." !.;~ 'I