The design of the track to control river channel directing flow to water intake point requires the solution of a number of issues. Including the magnitude of the deflection of the dynamic axes of flow contracted by control structures. The main goal of the work is to develop the design method for the deflection of the dynamic axes of flow unilaterally contracted by a combined dam with a through-flow part made of tetrahedrons. The task is accomplished using Varignon’s theorem and the equation of conservation of discharges written for sections where flow natural condition is maintained in the headrace and contracted section. The concept of flow around the coefficient is introduced as the ratio of incoming discharge to the discharge passing the through-flow part of the combined dam. Design relationships have been proposed to determine the relative deflection of the dynamic axes of flow specific discharge in the non-contracted section of flow carrying capacity of the through-flow part is evaluated through the coefficient of flow-around. Numerical methods carried out for Chirchik river conditions have shown satisfactory results.