The size and capacity of the senior high school were determined by a review of the student population of 1952 and a projected six-year enrollment.

[citation needed] Construction began on February 10, 1964, of an approximate two million dollar addition to the original senior high building.

[citation needed] In October 1978, Hempfield Area High School was once again altered by an addition to the building.

Finally, a field house with new wrestling facilities, locker rooms and athletic offices was added in the north endzone of Spartan Stadium.

[citation needed] In March 2007, a 15-year-old student was mistakenly jailed for 12 days in a juvenile detention facility for allegedly making a bomb threat over the school district hotline, because school officials had overlooked daylight saving time while evaluating the calling records.

HAHS uses the services of Central Westmoreland Career and Technology Center in New Stanton for the students there who wish to choose a vocational or technical program.