Supplement to Water-Resources Investigations Report 99-4122, Lake-Level Frequency Analysis for the Waubay Lakes Chain, Northeastern South Dakota [open pdf - 5MB]
From the Abstract: "A supplement to a U.S. Geological Survey report was prepared to present lake-level frequency results for the Waubay Lakes Chain, northeastern South Dakota, incorporating a modified outlet between Rush and Bitter Lakes. The modification involved removal of two farm crossings from the drainage way between Rush and Bitter Lakes. The farm crossings were removed during July-August 1999 as a result of a court ruling. Water mass-balance and stochastic time-series models were revised to incorporate the modified outlet and also to change the starting lake levels to October 1, 1999."
Water-Resources Investigations Report 99-4251
U.S. Geological Survey: https://www.usgs.gov/