Dean Snyder Construction said it is on track to finish a $7.35 million project at North High School in Des Moines by October. Besides constructing a 10,000-square-foot addition for a new administrative area, the contractor is remodeling 136,500 square feet of the school building at 501 Holcomb Ave. Dean Snyder Construction is also working to complete a 12,000-square-foot addition to Nevada High School as part of a renovation project that will create more classroom space and include geothermal heating and cooling systems.