Chief Mahaska will remain. On the 100 year anniversary of the Chief Mahaska statue in the Oskaloosa Square, Mayor Dave Dixon, local historian Chuck Russell and others all paid homage to the Ioway tribe leader Tuesday evening. The statue was first dedicated May 12, 1909, and rededicated in 1999. At the time of the 1999 rededication, Chief Mahaska wasn’t in good shape, said Russell. He added, raising the funding for the statue’s restoration was not difficult.