Tetra Tech Rizzo , a Framingham engineering consulting firm, has been chosen to help study the feasibility of expanding the Boston Common Garage.
The Massachusetts Convention Center Authority awarded the contract for the garage, which has its entrance on Charles Street, directly across from the Public Gardens.
Tetra Tech Rizzo, a division of California-based Tetra Tech Inc., is also working with DESMAN Associates and Browne, Richardson & Rowe on the study.
Tetra Tech Rizzo also has offices in Braintree, Manchester, N.H. and Hartford, Conn.
