The design shows Clark and two others sloshing through icy waters, a design that CCAC member Robert Hoge challenged even after it won 22 points out of a possible 29.
None of the 12 other designs drew more than six points.
Hoge, a numismatic researcher, charged that the three soldiers in the design are not properly armed. They don’t even have powder horns, Hoge noted.
U.S. Mint officials promised to recheck the soldiers’ arms.
The coin designs are scheduled to be shown to the Commission of Fine Arts Oct. 15.
After that, all recommendations will be sent to Treasury Secretary Jacob Lew, who has the final word on U.S. coin designs.