Coronado Bridge in San Diego is known as "Silvergate."
Look what's just north of San Diego: https://www.google.com/maps/place/2222+Mission+Ave,+Oceanside,+CA+92058/@33.2120042,-117.3587444,612m/data=!3m1!1e3!4m5!3m4!1s0x80dc702ae583d21f:0x1a62a7318ff9748!8m2!3d33.2117208!4d-117.3594212
Coordinates and Gematria: 33.21173063316039, -117.35944306026609
Lat reduces to 6. Long reduces to 66.