The three-day project will remove the current building to make way for new, bigger facility is projected to open in fall of this year.
Crews started with the south side of the building just after 9 a.m. with an excavator destroying the south wall.
Demolition was delayed in order for fiber-optic cables to be identified and removed to avoid an interruption in service, Assistant Superintendent of Operations James Barfoot said.
The new 11,524 square foot building is nearly 4,000 square feet bigger to accommodate separate areas for the Farmington High and Piedra Vista football teams along with a larger weight room.
Each school will get a set of offices for its head and assistant coaches along with their athletic trainer and storage for equipment.
The original project began as a remodel to upgrade lockers and update interior work like paint and carpet but grew into a new building being constructed.
The increased scope of the project raised the original budget of $1.2 million to $2.2 million.
Keep reading Friday's edition of The Daily Times for more on this story.
Joshua Kellogg may be reached at firstname.lastname@example.org; 564-4627. Follow him on Twitter @jkelloggdt