Any such adjustments in the timing of flows which are proposed in such report shall be consistent with other project purposes and shall not have significant adverse effects on fishing or on any other form of recreation in Bluestone Lake or in any segment of the river below Bluestone Lake. The study shall assess the effects of such flow adjustments on the quality of recreation on the river in the segments of the river between Hinton and Thurmond and between Thurmond and the downstream boundary of the New River Gorge National River,