This paper examines the joint agro-wildfowl regulation of the Tule Lake National Wildlife Refuge in California. The area is jointly managed by the Bureau of Reclamation for both farming and wildfowl benefits. Production in both sectors has been declining recently, in farming due to nematode and soil pathogen buildup and in wildfowl production due to climax vegetation choking the lake. A novel spatial rotation plan has surfaced to solve both problems. We develop a simple model of the rotation option to identify critical variables and then we estimate some of these using data on lease bids.