Here is the 1940 US Census for Grace (Abbott) and Simon Jordal residing in Fall River county, South Dakota.
Simon was still working as a farmer. He was the son of Isabelle (Halvorson) and Lars Jordal and grandson of Sigri Gunnersdatter and Ole Larson.
Grace Jordal was the enumerator for the 1940 Census. You can see her name listed on the top right hand portion of the census.