In 1875 the school had 25 students; that year its first permanent building, with a cost of $5,000, opened; it was destroyed in a fire in 1913.
[2] In the 1950s the Walnut School building received an addition on its north side.
[4] From circa 2011 to 2016, of all Iowa district's, Walnut had the largest drop in the number of enrolled students.
[6] If the Walnut district did not merge, in the following school years its spending could have increased beyond the amount permissible under Iowa law.
[4] The vote was approved by 77% of the Walnut voters and 94% of those within A-H-S-T, with a combined total of 614 for and 74 against.