With the 2014-15 academic year poised to start next week, some school building projects are winding down, while others are just getting started.

The school year begins for all students Thursday of next week, while teachers report Monday and sixth- and ninth-graders have orientation Wednesday.

The school district has a budget of $155.7 million in the current fiscal year for its eight elementary schools, three middle schools and two high schools, as well as an alternative school.

Total enrollment, according to the school budget, is projected at 10,251 students, with a staff of about 950 teachers and certified support personnel.

According to Sal Morabito, the district's manager of construction, security and safety, PCB abatement and some window replacements were done at Osborn Hill School over the summer vacation. "During the school year, the existing gymnasium will be renovated," said Morabito. The work is expected to be finished by next January. Osborn Hill students, meanwhile, will use a temporary gym, constructed out of portable classrooms.

The remaining windows and doors will be replaced next summer, and done in time for the start of the 2015-16 school year. The Osborn Hill project has a $4.19 million price tag, and includes the remediation of PCBs found in window and door caulking several years ago.

At Riverfield School, a $16.35 million project to construct additional classrooms and carry out renovations has begun, according to Morabito. He said three of the five portable classrooms at the Mill Plain Road school have been demolished and new sanitary sewer pipes and part of a storm water retention system has been installed. The rest of the project, which includes seven full-size classrooms, an additional serving line in the cafeteria, expanding the gym and renovating administration space, is now out to bid.

The third phase of a four-phase roof replacement project at Fairfield Warde High School is nearing completion, and a partial roof replacement at Mill Hill School was expected to be completed this week. A boiler replacement project is also underway at North Stratfield School, Morabito said.