PS1194 Specialty Contract-ALTA Survey and Site Elevations for Back of the Yards area High School-47th & Hoyne. Contract PDF: ALTA Surveyor Services – Back of the Yards HS Other Documents: Amendment 1 – ALTA Surveyor Services Awarded to: Chicago Guarantee Survey Company Board Approval Date: 12/07/2007 Related Projects Back of the Yards College Prep High School 2111 West 47th Street Ward 12 : New City