In all easements, the primary beneficiary (the City of Escondido) would have to issue a quitclaim deed in order to vacate the easement. The application process may take a month to three months.
I’m pretty sure the easement is not part of the San Diego Aqueduct. The easement in question is only 10 to 20 feet wide. The Aqueduct’s right of way is more than 50 feet wide.