Welcome to Aqua Sierra Controls, Inc. Aqua Sierra Controls Inc. is an Instrumentation and Electrical Contractor specializing in Process Control Automation for Industrial and Municipal Installations and a manufacturers representative for Data Flow Systems. Aqua Sierra Controls began operations on October of 1979 as a California Based (S) Corporation. Les Watson serves as the president and RME. We are located in Auburn, California, just above Sacramento in the Sierra Mountain Foothills. Aqua Sierra Controls services such as design engineering, construction, service, instrumentation, and electrical. Systems Integration, PLCs, SCADA, Custom Control Panel Fabrication. We provide these services for municipal, public works, industrial and co-generation plants throughout California.