Diversification and
Operation

The Mission Trails Flow Regulatory Structure II Project reached 50% completion by the end of June 2021. The project includes construction of a new 5-million-gallon underground covered water tank, flow control facility, and pipeline connections. The largest component of the project is the building of the underground tank called a flow regulatory structure (FRS II) which will be used to balance flows in the aqueduct system. The upgrade will increase water reliability for treatment plants that serve the central and southern sections of San Diego County.

Throughout the project, Water Authority staff and contractors worked with park rangers to keep trail users safe, by providing alternative trail routes, signage, and additional public outreach. Once complete in early 2022, the hill above the FRS will be leveled to its previous contours and revegetated with native plants – many seeded and grown from plants within the park itself. Mission Trails Park users will likely see no difference in the landscape because the project aims to blend into the park.