The Manhattan-Ogden school board approved more than $500,000 in school capital improvement projects at its meeting Wednesday.

The board approved maintenance and facilities director Matt Davis’ four requests for projects affecting several schools.

Davis and his crews will replace the fire alarm and clock systems, which are original to the buildings, at Anthony and Eisenhower middle schools. The district had allocated $500,000 for the project, but Davis recommended a $307,000 bid from Torgeson Electric of Topeka. Each school’s system will cost about $153,500.

Maintenance also will finish upgrading the front doors at the Manhattan High School West Campus. Most doors are on electronic access control systems, but a few aren’t. The board approved a bid from CBS Manhattan LLC for $13,575.

The district also will replace Ogden Elementary’s rooftop cooling tower after hard water caused a problem. In the summer, the water softener system in the tower could not support both the HVAC system and the building domestic water system. The softener was replaced several years ago, Davis said in a memo to the board, which helped extend the life of the tower, but it now needs replacing as hard water deposit remover has impacted the tower. The board approved a bid of $61,750 from Central Mechanical Construction Company of Manhattan to replace the tower.

District maintenance crews also will work on replacing the epoxy coating in the restrooms and kitchens at Eisenhower and Anthony middle schools, six classrooms in Northview Elementary, a portion of the kitchen in Ogden Elementary, four classrooms at Lee Elementary and in four small restrooms in Theodore Roosevelt Elementary. The coating will be added from the floor to 5 feet up the wall for sanitary and cleaning reasons at Northview, Lee and Theodore Roosevelt. The project will cost $129,949 through Epoxy Coating Specialists of Kansas City.