Why has condemnation been so rarely used by the federal government on wild and scenic rivers?

There are more appropriate and cost-effective ways to ensure resource conservation along wild and scenic rivers than using the Wild & Scenic Rivers Act’s condemnation authority. (Refer to Protecting Resource Values on Non-federal Lands (1996).)

Agencies may acquire properties using appropriated funds under the Land and Water Conservation Fund Act or other authorities. Owners are contacted in order to see if an exchange or voluntary purchase can be negotiated.

Source
Interagency Wild & Scenic Rivers Council