This is the second of three volumes comprising the Design of TVA Projects and is one of a planned series of special reports recording the experience of TVA in carrying out the major phases of its engineering and construction program. It undertakes to explain the engineering work involved in the design of electrical installations for primary water control stations of TVA, including switch-yards constructed at the generating stations but not transmission lines and substations.

The development from inception through initial operation of four major TVA water control projects in the upper or northeastern part of the Tennessee Valley - Watauga, South Holston, Boone, and Fort Patrick Henry, collectively designated Upper Holston - is presented in this technical report, The Upper Holston Projects. Improvement of the minor Wilbur project immediately below Watauga is included as an appendix. The manuscript was compiled from basic planning, design, construction and other development of the projects and comprises a record of the more important facts concerning the planning, design, construction, costs, and initial operations of these projects by the TVA.