Four Seasons Calistoga

Four Seasons Calistoga is a substantial multi-purpose development of a 23-acre parcel that will include two inns, commercial space, a spa, swimming pools, a vineyard and wine cave, and a below-grade parking deck. Langan performed a geotechnical investigation and a limited environmental site assessment for the proposed development. As part of our services, we performed a hydrogeologic study to evaluate the potential flow discharge rate arising from the basement wall back drain and underslab drainage system during heavy rainfall.