NORTH
Northern City of Chula Vista Boundaries and/Second San Diego Aqueduct boundary east to Highway 125 South to Proctor Valley Road East the Upper Otay Reservoir.

EAST
South from Middle Upper Otay Reservoir south to the Middle of Lower Otay Reservoir to the San Diego County Line.

SOUTH 
An Imaginary line extended southward from the Lower Otay Reservoir west along the San Diego County line west to the extension of Highway 125 North.

WEST
North from the San Diego County and Highway 125 North to Telegraph Canyon Road West to Rutgers Ave. North on Rutgers Ave. to Corral Canyon Road north to an imaginary line on northern City of Chula Vista boundary/Second San Diego Aqueduct.