The third and final phase of renovations at Lake Highlands High School are expected to begin in March, according to Richardson ISD. The RISD board of trustees approved a guaranteed maximum price of about $14.7 million for Phase 3 of construction at its Aug. 12 meeting. The project scope encompasses new classrooms, additional electrical and mechanical system work, and the addition of a city-mandated storm shelter, according to meeting documents.  “We are within the budget,” Assistant Superintendent Sandra Hayes said at the meeting. “We feel good about the project. We are moving forward.” Lake Highlands High School has been under renovation since December, a RISD spokesperson said via email. Initial phases of construction included construction of a new multipurpose activity center, a larger cafeteria, a new library, and mechanical and electrical system upgrades.  Work also includes construction of a connector building to join two classroom facilities currently referred to as the L Building and H building, according to the email.  Construction will continue through next year. It is expected to be complete by December.