This summer, Pattonville will enter its last phase of construction and upgrade projects made possible by a $19 million zero tax rate increase bond issue approved by voters in November 2006. -Read-More- A number of projects have been completed in the past two years, including replacing classroom trailers with permanent facilities, safety improvements to front entrances at some schools, replacing HVAC (heating, ventilation and air conditioning) and more. A list of the major work scheduled for the summer of 2009 is listed below by school:   Briar Crest Elementary Cafeteria upgrades Bridgeway Elementary Cafeteria upgrades Classroom flooring abatement Classroom flooring installation   Parkwood Elementary Cafeteria upgrades   Rose Acres Elementary Cafeteria upgrades Classroom flooring abatement Classroom flooringinstallation   Willow Brook Elementary Cafeteria upgrades Four-classroom building addition   Holman Middle School Science lab renovations   Pattonville Heights Middle School Science lab renovations Classroom HVAC upgrades   Pattonville High School Fire suppression system completion Corridor ceiling replacement Locker replacements -End-