What is the responsibility of the federal study agency for a river identified for study under Section 5(d)(1) of the Wild & Scenic Rivers Act and found ineligible?

Once such a river segment has been found to be ineligible, the agency will manage the river and its corridor based on the underlying management direction in its programmatic plan and need no longer protect it as a potential wild and scenic river.

Source
Interagency Wild & Scenic Rivers Council