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Missouri River Historical Development

Monson, 74, is the last remaining member of the original 1989 MRHD board. He was president from 2004 to 2017, and became the organization's first executive director in 2018. He will be retired by the end of February. 

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SIOUX CITY -- Missouri River Historical Development Inc. (MHRD) executive director Mark Monson will be retiring in December after 30 years wit…

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