The engineers employed by Jack D. Gillum and Associates who had "approved" the final drawings were found culpable of gross negligence, misconduct and unprofessional conduct in the practice of engineering by the Missouri Board of Architects, Professional Engineers, and Land Surveyors.
Sejumlah insinyur/teknisi yang dipekerjakan Jack D. Gillum and Associates yang "menyetujui" gambar akhir dinyatakan bersalah atas kecerobohan berat, salah mengambil tindakan, dan tindakan tidak profesional dalam praktik teknik sipil oleh Missouri Board of Architects, Professional Engineers, and Land Surveyors.