Overview of Reservoir Release Improvements at 20 TVA Dams

Abstract

In 1987, the Tennessee Valley Authority (TVA) authorized a comprehensive review of reservoir operating priorities that had been followed since 1933. The purpose was to ensure optimum operation of the reservoir system, recognizing that needs, demands, and values change over time. The review resulted in a five-year, $50 million program to improve the quantity and quality of releases from 20 dams in the Tennessee Valley. TVA worked with state and federal resource agencies to define minimum flow and dissolved oxygen targets for each tailwater. Facilities and operating procedures were designed and installed to meet the target conditions. This paper describes the facilities, operating procedures, and performance of the reservoir release improvements. Alternative approaches, monitoring requirements, operational problems, and costs are discussed. Results from four years of operation are presented.