In 1920 Henry, wife and daughter were living in Melville, Grant Co., North Dakota.
Henry Maier, b. Russia, 33, immigrated 1906, pending papers for naturalization, general farmer.
Christine, wife, b. Russia, 27, imm 1909, alien.
Alma, b. ND, 6.
In 1942 Henry Maier
Born=9 Oct 1886, Russia
Residence=Route 1, Box 22, Rupert, MInidoka, ID
Occupation=farmer for C. A. Bailey, Rupert
Nearest Person=Ed Plocher, Rupert
Source=U.S. World War II Draft Registration Cards 1942.
I didn't find anything else for any of the family.
There is a volunteer in Minidoka Co. who looks up PUblic Records. Go to raogk.org
Scroll down to Minidoka Co.
Maybe Steve can find a death record or marriage record for Alma. Successful Searching!