In 1989, inspection of the Lake Ilo dam found that critical maintenance was needed. A notch cut into the spillway lowered the water about 7 feet so the work could be completed. The exposed lake bed revealed remarkable discoveries and mysteries of . . . — — Map (db m153143) HM
Chelsey and Polly Dinkins played a major role in the construction and operation of this dam and National Wildlife Refuge known as Lake Ilo.
Chelsey Dinkins was the foreman of the Works Progress Administrations (WPA) crew that built the dam in . . . — — Map (db m152944) HM
On July 28, 1864, a U.S. military force, commanded by General Alfred Sully, attacked several groups of the Dakota, Nakota, and Lakota (Sioux) Nations camped at this location. Major Sioux leaders included Medicine Bear and Sitting Bull. Sully's force . . . — — Map (db m152945) HM